3,771 l3 Engineer jobs in the United Kingdom

About us

Charterhouse Group is a UK based, PE backed, value-added reseller providing a wide range of technology solutions across the Unified Communications, Cyber Security, LAN and Microsoft Teams spaces.

Our Values

• Bring your best self – Be honest. Be authentic. Be the best you can be.

• Do the right thing – For you and your team. For the whole team. For the Customer. Always.

• Take responsibility/own it – Do what you say. Find a way. Make it happen.

• Love what you do – Bring Passion to work. Take pride in what you do. Enjoy winning.

A Microsoft Solutions Partner for Modern Work and Security and Microsoft FastTrack Ready Partner – where award-winning excellence meets innovation and end-to-end service. We are specialists dedicated to finding new and better ways of working and help companies stay ahead of the curve by adopting Microsoft’s AI solutions where possible.

Our unique position as a specialist Microsoft partner means we are trusted by customers to deliver value-driven solutions – whether that’s by creating a single seamless communication solution for customers across all Microsoft products and MS ecosystems or through our business-led consulting services.

Role Purpose

As a member of the operational Support Team you will be working with other L3 Engineers to monitor, manage and support our clients Microsoft Teams Rooms and Audio Visual equipment in the clients Meeting Spaces environments for a portfolio of customers. The role requires teamwork to share knowledge within the team. Supporting each other to improve effectiveness and efficiency. Our clients are well known, large to enterprise businesses with a growing number of international offices to support.

The key purpose of the role will be to respond to client requests reactively and proactively identify issues using monitoring alerts both within our Response Service Level (SLA) and resolve them within our Resolution SLA to a high level of customer satisfaction to keep Meeting Spaces available and healthy.

Requirements

Duties and Responsibilities

• The role provides experience working in a team of experts, collaboration with cross functional teams, dedicated weekly self-development time with opportunities for on-site work, and staggered working shift times.
• Key Duties and Responsibilities
• Provide Incident, Request, Change and Problem Management support directly to our clients Service Desk teams.
• Take ownership of client’s incidents and requests, meeting SLA timelines for troubleshooting & resolution.
• Reasonable flexibility from time to time to meet the needs of critical incident resolutions and update tasks.
• Review monitoring and alerts to identify known errors, what needs suppression, and what needs an incident for investigation and resolution.
• Perform root cause analysis (RCA) for high priority Incidents and identified Problems /trends to reduce risk of repeat incidents.
• Provide technical input to develop Knowledge Articles, optimise processes and improve resolution time.
• Suggest Service Improvements. You will have influence in enhancing how the future of Support Service is delivered.
• Manage your own time effectively and efficiently, ensuring expectations are managed and communicated with clients and the internal team.
• Proactively keep others informed of your progress and escalate challenges or delays in a timely and professional manner.
• Where required, support new technology service/solution acceptance into support.
• Build and develop strong relationships between Charterhouse, our partners and our clients.
• Be available to provide expert advice, recommendations and guidance on systems and products supported by us to colleagues.
• Use Teams Call Quality Dashboard to analyse call quality and reliability to identify improvements that can be made.
• As needed operationally, perform remote and onsite software upgrades of supported equipment.
• Attend regular incident reviews looking at the status of open tickets with other engineers, regular 1-2-1 meetings with line manager and team and client meetings.
• As required operationally, working with our Projects to gain experience with new clients and technologies. Sharing learnt knowledge into the Support Team and bringing Support knowledge into the Project Team to help with alignment and collaboration between teams that will benefit the client, engineers and us.
• Occasionally providing planned on-site support for a client, where agreed in advance.
• Providing on call duties each month as part of a team rota.

Required Knowledge, Skills and Experience

• Minimum of 2 years’ experience supporting Audio Visual equipment within a Service Operations Support environment.

• Level 3 knowledge in Microsoft Teams Rooms and 2 or more of the following technologies (ideally at a support level):

• Yealink MTR related equipment

• Logitech MTR related equipment

• Lenovo MTR related equipment

• HP / Poly MTR related equipment

• Microsoft Surface Hubs

• Teams Desk phones (Poly, Yealink, Crestron, AudioCodes etc)

• Demonstrable competence and capability in a L2- L3 AV support role.

• Experience dealing with external customers delivering to SLAs.

• Capable of prioritising and managing high volume workloads from multiple sources, working to SLAs.

• Must be flexible and occasionally able to work outside of business hours.

• Excellent communication skills, both written and spoken English.

• Professional and positive, self-motivated and self-sufficient.

• Diligent, with great attention to detail. Good at problem solving.

• Ability to cope successfully under pressure and with shifting priorities.

• Excellent collaborator and team player. Able to work on own initiative.

• Assertive, adaptable, and creative.

• Must have the right to work in the UK. Must have or pass Baseline Personal Security Standard (BPSS) to work with the British Government.

• English speaking.

Desired Knowledge, Skills and Experience

Support experience with any of the following technologies:

• Crestron

• QSC

• Shure

• Sony, NEC, Samsung, LG Displays

• Speaker Phones (Audio Conference Rooms)

• Room Booking Panels

• Video Walls

• Digital Signage

• Microsoft Teams- Call Quality Dashboard

• ServiceNow

• Asset management systems (equipment /software management tracking)

Benefits

Join us, and your benefits and perks will include private healthcare, Medicash cashback, life assurance, workplace pension, cycle to work scheme, access to our employee assistance programme, savings discount, 20% EE discount that extends to your family and friends, a birthday gift voucher and day off, plus more.

Job Title: Level 3 GCP Support Engineer

Location: Hybrid in London (2-3 days)

Employment Type: 6 month FTC

Salary: Competitive

Start Date: Immediate

Industry: Enterprise MSP

An established consultancy delivering large-scale Oracle Cloud ERP & SCM solutions is seeking an experienced L3 GWS/GCP Support Engineer to deliver high-impact, mission-critical support for their internal customers. Sitting within the Managed Services team, this role is central to ensuring exceptional service quality, uptime, and customer satisfaction across our Commerce Engineering product portfolio.

You’ll be part of the Production Support department, handling diverse applications and systems that keep business operations running smoothly. They're looking for someone who is technically sharp, service-oriented, and thrives in fast-paced, dynamic environments.

L3 GCP Support Engineer – Key Responsibilities

• Provide advanced technical support and administration for the Collaboration Applications suite, including but not limited to:
• Microsoft Office 365, Google Workspace, Dropbox, Box, Lucidchart, Asana, Tableau, Slack, SurveyMonkey, and Quip
• Troubleshoot and resolve complex issues, partnering closely with end users and vendors
• Deliver training sessions on new and existing features
• Support and test application changes and releases
• Identify and analyze recurring issues or trends, propose solutions, and coordinate with engineering teams
• Migrate users from deprecated or legacy tools to new platforms, providing end-to-end support
• Monitor and optimize system performance, ensuring reliability and efficiency
• Maintain user and admin documentation through internal wikis and knowledge bases

L3 GCP Support Engineer – Key Skills Required

• 8+ years’ experience in System Administration and custom solution development focused on collaboration tools
• Deep technical hands-on experience with:

1. Google Workspace: Drive, Docs, Sheets, Slides, Sites, Forms, AppScripts, and integrations

2. Microsoft Office 365: All O365 apps including PowerAutomate, Exchange, integrations, and custom development

• Expertise in APIs, system integrations, and custom configurations for the above platforms
• Proven ability to consult on application features and manage new SaaS application requests
• Strong experience in exception evaluations, security assessments, and process improvements

Please apply now if this role is of interest.

Job Title: Level 3 GCP Support Engineer

Location: Hybrid in London (2-3 days)

Employment Type: 6 month FTC

Salary: Competitive

Start Date: Immediate

Industry: Enterprise MSP

An established consultancy delivering large-scale Oracle Cloud ERP & SCM solutions is seeking an experienced L3 GWS/GCP Support Engineer to deliver high-impact, mission-critical support for their internal customers. Sitting within the Managed Services team, this role is central to ensuring exceptional service quality, uptime, and customer satisfaction across our Commerce Engineering product portfolio.

You’ll be part of the Production Support department, handling diverse applications and systems that keep business operations running smoothly. They're looking for someone who is technically sharp, service-oriented, and thrives in fast-paced, dynamic environments.

L3 GCP Support Engineer – Key Responsibilities

• Provide advanced technical support and administration for the Collaboration Applications suite, including but not limited to:
• Microsoft Office 365, Google Workspace, Dropbox, Box, Lucidchart, Asana, Tableau, Slack, SurveyMonkey, and Quip
• Troubleshoot and resolve complex issues, partnering closely with end users and vendors
• Deliver training sessions on new and existing features
• Support and test application changes and releases
• Identify and analyze recurring issues or trends, propose solutions, and coordinate with engineering teams
• Migrate users from deprecated or legacy tools to new platforms, providing end-to-end support
• Monitor and optimize system performance, ensuring reliability and efficiency
• Maintain user and admin documentation through internal wikis and knowledge bases

L3 GCP Support Engineer – Key Skills Required

• 8+ years’ experience in System Administration and custom solution development focused on collaboration tools
• Deep technical hands-on experience with:

1. Google Workspace: Drive, Docs, Sheets, Slides, Sites, Forms, AppScripts, and integrations

2. Microsoft Office 365: All O365 apps including PowerAutomate, Exchange, integrations, and custom development

• Expertise in APIs, system integrations, and custom configurations for the above platforms
• Proven ability to consult on application features and manage new SaaS application requests
• Strong experience in exception evaluations, security assessments, and process improvements

Please apply now if this role is of interest.

• Provide advanced technical support (Level 2 and Level 3) for proprietary software applications and integrated systems.
• Diagnose, troubleshoot, and resolve complex hardware, software, and network-related issues reported by clients.
• Analyze incident logs, system performance data, and user feedback to identify root causes of recurring problems.
• Escalate unresolved issues to development teams or engineering with detailed documentation and reproduction steps.
• Develop and maintain comprehensive technical documentation, knowledge base articles, and troubleshooting guides.
• Collaborate with the Quality Assurance team to identify and report software defects.
• Assist in the testing and deployment of software patches and updates.
• Provide training and mentorship to Level 1 support staff.
• Manage client expectations and communicate technical solutions clearly and concisely.
• Participate in on-call rotation as required to provide 24/7 support coverage.
• Contribute to the continuous improvement of support processes and tools.
• Monitor system health and proactively identify potential issues.
• Work closely with account management and sales teams to ensure client success.

• Bachelor's degree in Computer Science, Information Technology, or a related field, or equivalent practical experience.
• Minimum of 4-6 years of experience in a technical support role, with a strong emphasis on L2/L3 troubleshooting.
• In-depth knowledge of operating systems (Windows Server, Linux), networking protocols (TCP/IP, DNS, HTTP), and database technologies (SQL).
• Experience supporting web applications, APIs, and cloud-based platforms.
• Familiarity with scripting languages (e.g., PowerShell, Python) is a significant advantage.
• Excellent analytical, diagnostic, and problem-solving skills.
• Strong verbal and written communication skills, with the ability to explain technical concepts to non-technical users.
• Customer-focused attitude with a passion for delivering exceptional support.
• Ability to work effectively under pressure and manage multiple priorities.
• Must be eligible to work in the UK and based within commuting distance of Portsmouth, Hampshire, UK .

Network & Infrastructure Engineer

Location: London / Hybrid

Salary: £40,000-£60,000

Overview

We are seeking an experienced Network & Infrastructure Engineer to design, implement, and support secure, scalable, and high-performing technology environments across our organisation.

This is an exciting opportunity to work at the cutting edge of Smart Building applications, IoT, IT/OT convergence to integrate building auto; HVAC, lighting, security and IoT with enterprise IT Systems.

This is a hybrid technical and stakeholder-facing role, combining hands-on engineering expertise with project delivery and business engagement skills. You’ll lead network and infrastructure initiatives end-to-end — from understanding user needs and translating them into technical designs, through to deployment, documentation, and optimisation.

The ideal candidate will have a strong grounding in network and security technologies, cloud infrastructure, and project management, with the ability to communicate effectively across technical and non-technical teams.

Key Responsibilities

Network & Infrastructure Design

• Design, deploy, and maintain network infrastructure including LAN/WAN, wireless, VPN, and firewalls.
• Configure and manage network segmentation, VLANs, and routing to support secure and efficient data flow.
• Oversee server, storage, and virtualisation environments (on-premise and/or cloud).
• Implement and maintain cloud connectivity and hybrid networking (Azure/AWS VPNs, ExpressRoute, etc.).

Security & Compliance

• Ensure network and infrastructure security align with organisational policies and standards (ISO27001, GDPR, etc.).
• Configure and monitor firewalls, intrusion detection/prevention systems, and endpoint security solutions.
• Support identity and access management, MFA, and secure network access policies.
• Conduct regular vulnerability assessments, patch management, and system hardening.

Project Management & Delivery

• Lead infrastructure and network projects from scoping through delivery, ensuring quality, cost, and time objectives are met.
• Define technical requirements and translate business needs into deliverable solutions.
• Develop and maintain project documentation including architecture diagrams, risk registers, and deployment guides.
• Manage vendors, suppliers, and third-party contractors to ensure aligned delivery outcomes.
• Apply structured project management methodologies (Agile, Prince2, or hybrid).

Stakeholder Engagement & Collaboration

• Act as a trusted advisor to internal teams and business units, gathering and translating technical requirements into actionable solutions.
• Collaborate closely with IT, Operations, Security, and external partners to ensure seamless integration and delivery.
• Communicate complex technical concepts in clear, non-technical language for diverse audiences.
• Provide updates and reports on project progress, risks, and mitigations to leadership and stakeholders.

Operations & Support

• Provide third-line support for network and infrastructure incidents and escalations.
• Monitor system performance and implement improvements to enhance reliability and scalability.
• Maintain detailed documentation of infrastructure, configurations, and changes.
• Participate in an on-call or escalation rota as required.

Qualifications & Experience

Essential:

• 5+ years’ experience in network and infrastructure engineering roles.
• Proven experience managing and delivering technical projects end-to-end.
• Strong knowledge of IP networking, routing, switching, VLANs, VPNs, and firewall configuration (Cisco, Fortinet, Palo Alto, etc.).
• Hands-on experience with cloud platforms (Microsoft Azure, AWS, or equivalent).
• Familiarity with Active Directory, Azure AD, DNS, DHCP, Group Policy, and M365 environments.
• Strong understanding of cybersecurity principles, access control, and encryption standards.
• Excellent communication, stakeholder engagement, and documentation skills.

Desirable:

• Relevant certifications (CCNA, CCNP, CompTIA Network+/Security+, Azure Administrator, etc.).
• Experience with infrastructure automation or scripting (PowerShell, Python).
• Knowledge of monitoring and observability tools (SolarWinds, PRTG, Grafana, etc.).
• Experience with ITIL practices and ServiceNow or equivalent ticketing systems.

Personal Attributes

• Technically curious, proactive, and solutions oriented.
• Confident engaging with technical and business stakeholders alike.
• Comfortable balancing hands-on technical work with structured project delivery.
• Strong organisational and time-management skills with a focus on quality and outcomes.

Why Join Us

• Be part of a forward-thinking technology function driving innovation and digital transformation.
• Work on diverse infrastructure and security projects with tangible business impact.
• Opportunities for ongoing professional development and certification.
• Supportive and collaborative environment where technical excellence is valued.

Network & Infrastructure Engineer

Location: London / Hybrid

Salary: £40,000-£60,000

Overview

We are seeking an experienced Network & Infrastructure Engineer to design, implement, and support secure, scalable, and high-performing technology environments across our organisation.

This is an exciting opportunity to work at the cutting edge of Smart Building applications, IoT, IT/OT convergence to integrate building auto; HVAC, lighting, security and IoT with enterprise IT Systems.

This is a hybrid technical and stakeholder-facing role, combining hands-on engineering expertise with project delivery and business engagement skills. You’ll lead network and infrastructure initiatives end-to-end — from understanding user needs and translating them into technical designs, through to deployment, documentation, and optimisation.

The ideal candidate will have a strong grounding in network and security technologies, cloud infrastructure, and project management, with the ability to communicate effectively across technical and non-technical teams.

Key Responsibilities

Network & Infrastructure Design

• Design, deploy, and maintain network infrastructure including LAN/WAN, wireless, VPN, and firewalls.
• Configure and manage network segmentation, VLANs, and routing to support secure and efficient data flow.
• Oversee server, storage, and virtualisation environments (on-premise and/or cloud).
• Implement and maintain cloud connectivity and hybrid networking (Azure/AWS VPNs, ExpressRoute, etc.).

Security & Compliance

• Ensure network and infrastructure security align with organisational policies and standards (ISO27001, GDPR, etc.).
• Configure and monitor firewalls, intrusion detection/prevention systems, and endpoint security solutions.
• Support identity and access management, MFA, and secure network access policies.
• Conduct regular vulnerability assessments, patch management, and system hardening.

Project Management & Delivery

• Lead infrastructure and network projects from scoping through delivery, ensuring quality, cost, and time objectives are met.
• Define technical requirements and translate business needs into deliverable solutions.
• Develop and maintain project documentation including architecture diagrams, risk registers, and deployment guides.
• Manage vendors, suppliers, and third-party contractors to ensure aligned delivery outcomes.
• Apply structured project management methodologies (Agile, Prince2, or hybrid).

Stakeholder Engagement & Collaboration

• Act as a trusted advisor to internal teams and business units, gathering and translating technical requirements into actionable solutions.
• Collaborate closely with IT, Operations, Security, and external partners to ensure seamless integration and delivery.
• Communicate complex technical concepts in clear, non-technical language for diverse audiences.
• Provide updates and reports on project progress, risks, and mitigations to leadership and stakeholders.

Operations & Support

• Provide third-line support for network and infrastructure incidents and escalations.
• Monitor system performance and implement improvements to enhance reliability and scalability.
• Maintain detailed documentation of infrastructure, configurations, and changes.
• Participate in an on-call or escalation rota as required.

Qualifications & Experience

Essential:

• 5+ years’ experience in network and infrastructure engineering roles.
• Proven experience managing and delivering technical projects end-to-end.
• Strong knowledge of IP networking, routing, switching, VLANs, VPNs, and firewall configuration (Cisco, Fortinet, Palo Alto, etc.).
• Hands-on experience with cloud platforms (Microsoft Azure, AWS, or equivalent).
• Familiarity with Active Directory, Azure AD, DNS, DHCP, Group Policy, and M365 environments.
• Strong understanding of cybersecurity principles, access control, and encryption standards.
• Excellent communication, stakeholder engagement, and documentation skills.

Desirable:

• Relevant certifications (CCNA, CCNP, CompTIA Network+/Security+, Azure Administrator, etc.).
• Experience with infrastructure automation or scripting (PowerShell, Python).
• Knowledge of monitoring and observability tools (SolarWinds, PRTG, Grafana, etc.).
• Experience with ITIL practices and ServiceNow or equivalent ticketing systems.

Personal Attributes

• Technically curious, proactive, and solutions oriented.
• Confident engaging with technical and business stakeholders alike.
• Comfortable balancing hands-on technical work with structured project delivery.
• Strong organisational and time-management skills with a focus on quality and outcomes.

Why Join Us

• Be part of a forward-thinking technology function driving innovation and digital transformation.
• Work on diverse infrastructure and security projects with tangible business impact.
• Opportunities for ongoing professional development and certification.
• Supportive and collaborative environment where technical excellence is valued.

Your new company
Join a forward-thinking public sector organisation committed to delivering innovative ICT solutions across Scotland. The company fosters a collaborative and inclusive culture, driving transformation and excellence in digital infrastructure.
Your new role
As a Network Engineer, you'll lead a high-performing technical team responsible for designing, building, and maintaining core ICT infrastructure. You'll play a key role in shaping strategic direction, solving complex problems, and ensuring the reliability and security of enterprise-wide systems across cloud, network, and communications platforms. The role offers flexibility to work from various ICT locations across Scotland, subject to availability.
What you'll need to succeed
Essential Qualifications & Experience:- Degree or relevant industry certification (e.g. Cisco CCIE) or extensive experience in a similar role.
- Proven expertise in ICT infrastructure support, including cloud, security, telephony, WAN/LAN, and remote access.
- Strong understanding of ICT automation tools and network security. - Experience with identity management systems (e.g. Active Directory, Azure AD, Radius).Essential Personal Qualities:- Ability to lead engineering teams without direct line management.
- Excellent communication and stakeholder engagement skills.
- Strong problem-solving capabilities under pressure.
- Adaptability and attention to detail.
- Experience managing enterprise-level infrastructure services.
Desirable:- ITIL Foundation Certificate.
- Experience supporting a live network across 500+ sites and 24,000+ users.
What you'll get in return - A dynamic and collaborative working environment.
- Opportunity to influence strategic ICT direction.
- Competitive Day Rate
- Exposure to cutting-edge technologies and transformation programmes.
- Flexible working location across Scotland's ICT hubs.
- Participation in a senior on-call rota and potential to deputise for the Infrastructure Manager.

What you need to do now
If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now.
If this job isn't quite right for you but you are looking for a new position, please contact us for a confidential discussion on your career.

Hays Specialist Recruitment Limited acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at hays.co.uk

Location:
Taunton (Hybrid, with potential for remote)

Clearance:
SC Cleared

Duration:
3 Months (Initial)

Day Rate:
£325

We're seeking an experienc
ed
Network & Firewall Engineer to join on a 3-month contract, supporting the delivery of secure, high-performance connectivity and resilience across a large enterprise environment.

This is a senior technical role where you'll act as the go-to authority on networking and firewall technologies, shaping and guiding the organisation's infrastructure strategy while also remaining hands-on in delivery.

What you'll be doing

• Leading on the design, configuration, and management of enterprise network infrastructure (LAN, WAN, VPN, SD-WAN).
• Overseeing firewall policies and network security zones (Cisco, Fortinet, Palo Alto or similar).
• Monitoring performance, resolving incidents, and ensuring service resilience.
• Supporting digital transformation projects by providing expert technical input.
• Mentoring and guiding engineers, setting standards, and driving best practices.

What we're looking for

• SC Cleared
  and available at short notice.
• Cisco CCNP-level knowledge and experience.
• Proven track record leading on enterprise networking and firewall management.
• Strong hands-on skills with network monitoring and diagnostic tools.
• Ability to influence and collaborate across technical teams and stakeholders.

Full Time, Permanent

The closing date for applications is 23.59 on 3rd October 2025

Interviews will be held: w/c 20th October

The University of Reading is an exciting and vibrant place to work where there are opportunities to get involved with a wide variety of work, from corporate systems to high profile research groups, and from the museums and archives to a working farm. The University offers a generous holiday allowance of 26 standard leave entitlement, 8 bank holiday and 6 closure days. We will provide a flexible, friendly working environment, good annual leave provision, training opportunities and the chance to work in an environment with a wide variety of challenges.

The Connectivity Team within Digital Technology Services (DTS) oversee the delivery and management of all secure, reliable and scalable network solutions across the campus infrastructure forming the foundation for all IT services across the University.

We are looking for a Network Engineer to join the team and help support the current infrastructure and assist in the delivery of our new network based on Juniper's IP-CLOS topology underpinned by Juniper Mist AI. Working with modern technology at an enterprise scale, this is a rare opportunity to learn and make a difference to the customers of the network

You must have the following to be considered for the role:

• Experience of working with network equipment at the edge, distribution and core.
• Associate Level certification or equivalent experience
• Knowledge of Network Access Control (NAC) products
• Experience of working with enterprise Wi-Fi

In addition, you should be able to:

• Demonstrate good working practices in a technical support environment.
• Experience of working within IT Service Management frameworks such as ITIL

You will have :

• Solid experience of working with enterprise networks
• Associate Level certification or equivalent experience
• Solid understanding of wireless networks and RF fundamentals
• Able to work on-site

The University is committed to having a diverse and inclusive workforce, supports the gender equality Athena SWAN Charter and the Race Equality Charter, and champions LGBT+ equality. We are a Disability Confident Employer (Level 2). Applications for job-share, part-time and flexible working arrangements are welcomed and will be considered in line with business needs.