8 System Admin jobs in London
Experienced/Lateral - Linux Systems Administrator
Posted 3 days ago
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Job Description
London
About Five Rings
Five Rings is a proprietary trading firm founded with a vision of combining strategy, innovation and technology to succeed in today’s global markets. With offices in New York, Boca Raton, London and Amsterdam, Five Rings trades in various domestic and international markets, both established and esoteric. Our team constantly seeks new opportunities, analyzes their risks and rewards, and creates strategies and tools to capitalize on them.
We have an open culture and encourage the flow of knowledge and ideas between all areas of the firm.
About the Role
We are seeking a hands-on professional for our growing systems administration team.
Systems Administrators are responsible for the workstations and servers of our rapidly expanding trading operations. In addition to all systems work both on the desktops and in the datacenters, Five Rings Systems Administrators frequently interact with users at various levels all across our organization.
We are a Linux shop both on the server side and the trader desktops.
Our firm runs Windows servers very rarely and Windows desktops as needed.
Skills & Attributes:
- Fluency in Linux administration is a must
- Experience in Debian/Ubuntu preferred
- A demonstrated ability to work tasks to completion and tolerate frequent context switches
- Experience with:
- BIND
- Ansible
- Linux KVM
- Zabbix
- Google workplace collaboration and productivity tools
- Some Windows administration skills are a plus, but not required
- Experience scripting in bash and python is preferred, SQL and Perl a plus
- Knowledge of cybersecurity tools including 2FA, iptable rulesets, Malwarebytes, fail2ban, etc.
- Ability to move and install equipment weighing up to 50lbs
- Preference to apply a breadth of experience towards varied responsibilities in a small-shop environment
- Comfortable with hands-on work, racking and stacking in datacenters is commonplace
Responsibilities include:
- Installations of workstations on our trading floors and in offices
- Installations of servers and networking appliances in data centers, sometimes requiring travel
Additional tasks include:
- Hardware maintenance
- Large-scale build-outs, sometimes requiring travel, both domestic and international
- Installations of office appliances such as printers, phones, televisions, etc.
This role will be fully in-person based out of London.
Applicants are able to apply to multiple positions, but we strongly encourage you to only apply to your top choice.
Apply for this job #J-18808-LjbffrSystem Admin Manager (HRIS)
Posted 3 days ago
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Job Description
Are you an experienced Systems Admin Manager seeking your next opportunity?
If so, our client needs you to focus on the ongoing Governance and maintenance of their PeopleXD/EVO Workspace, HR, Payroll, Learn and Talent cloud system. In addition, you will support with the implementations and development of additional functionality. This role is the first point of contact for the business, in relation to system access/Workflows, system amendments/changes, all reporting, all system interfaces and system queries.
Key Accountabilities:
- Workspace System Admin Management for timely and accurate system upkeep
- Manage system access, maintain security profiles and resolve access problems.
- Provide first line support and basic training to end users of the PeopleXD System.
- Trouble shooting basic issues and escalating more complex issues as appropriate to line manager.
- Maintaining the People XD system, specifically contributing to both system and data integrity and system upgrades, patching and associated approval, documentation and testing prior to implementation
- Maintain third party supplier relationships for integrating systems, upgrades, patching and testing.
- Manage all system Interfaces/integrations, scheduling and error reporting and associated error resolution for systems and other third-party interfacing data.
- Modifying software requirements ensuring consistency is maintained based on changing business needs through own system Design Authority.
- Providing system reports within agreed timescales.
- Performing data imports and exports into the system.
- Manage all post project outstanding defect resolutions through to implementation, along with managing the roadmap of project system upgrades and improvements.
About you:
- Previous experience working within either a Payroll, Workforce Management or HR People function, with minimum 1 year experience .
- Experience of working with cloud-based systems, ideally PeopleXD (previously CoreHR) and delivering basic system training
- Computer literate, including Microsoft applications - Word, SharePoint, Outlook, Office 365, Teams and PowerBI.
- Must possess Advanced Excel skills.
- Able to develop and maintains positive working relationships with others.
- A team player who is proactive at sharing ideas and information.
- Attention to detail - accurate, detailed and thorough approach to work and maintaining accurate records.
- Able to work under pressure, self-motivated and driven to achieve results.
- High customer service ethic, passionate about meeting the customer and wider business needs
Other:
The role will be office based, 5 days a week for the first 3 months then flexible thereafter - likely 3 days in the office.
37 hours per week, full time, Mon-Fri.
Free rail travel on certain networks
Rail travel discounts
Excellent pension scheme.
50173JR
INDHRR
Network Engineer / Systems Administrator
Posted today
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Job Description
Network Engineer / Systems Administrator
This is a varied role with lots of autonomy and is principally remote. It's with a long-standing client of ours who are a successful, innovative and award-winning VoIP service provider.
You'll be joining a small, geographically dispersed team of network engineers and systems administrators. You'll be looking after the running of the infrastructure that underpins the company's VoIP services. That entails as much time working on the Linux-based server estate as it will working on routers, switches etc (hence our hedging bets a bit with the job title!)
This is an exciting time to be in the VoIP industry, with changes (such as the PSTN switch-off) presenting plenty of opportunities and challenges. You'll get the opportunity to help introduce new technology and services as well as managing what's already there.
The company has a fully remote working model (with a standard 9-5:30 working day to ensure easy collaboration across time zones, as some of the team are overseas). This role will involve occasional visits to kit based at two London-based data centres (maybe once/month) but is otherwise fully home-based. With that in mind you should be in reasonably easy reach of London.
Network Engineer / Systems Administrator - responsibilities
- Deploying and maintaining physical servers and virtual machines
- Managing the core network and transit/peering connections
- Managing the access network and firewalls
- Deployment, configuration and updates of OS and software (internally developed or open source)
- Troubleshoot any infrastructure-related issues
- Travel to data centres when required
- Liaising with suppliers and co-ordinating remote-hands support when needed
- Writing and maintaining documentation
- Conducting regular audits
Network Engineer / Systems Administrator - requirements
- Linux systems admin - Ubuntu, GNU, KVM
- Scripting skills - bash/python
- Good knowledge of routers, firewalls & switches - preferably Juniper
- Strong networking skills: IPv4, IPv6, MPLS, QoS
- Good understanding of security
- VoIP/SIP experience would be very nice to have
- Any exposure to Microsoft Teams would be a plus
On top of a competitive salary, there's a great benefits package which includes: -
Uncapped company profit share
Performance-related bonus
Free Broadband and Telecoms
33 days holiday including bank hols
Holiday buy back scheme and extra day off for your birthday
Network Engineer / Systems Administrator
Posted 3 days ago
Job Viewed
Job Description
Network Engineer / Systems Administrator
This is a varied role with lots of autonomy and is principally remote. It's with a long-standing client of ours who are a successful, innovative and award-winning VoIP service provider.
You'll be joining a small, geographically dispersed team of network engineers and systems administrators. You'll be looking after the running of the infrastructure that underpins the company's VoIP services. That entails as much time working on the Linux-based server estate as it will working on routers, switches etc (hence our hedging bets a bit with the job title!)
This is an exciting time to be in the VoIP industry, with changes (such as the PSTN switch-off) presenting plenty of opportunities and challenges. You'll get the opportunity to help introduce new technology and services as well as managing what's already there.
The company has a fully remote working model (with a standard 9-5:30 working day to ensure easy collaboration across time zones, as some of the team are overseas). This role will involve occasional visits to kit based at two London-based data centres (maybe once/month) but is otherwise fully home-based. With that in mind you should be in reasonably easy reach of London.
Network Engineer / Systems Administrator - responsibilities
- Deploying and maintaining physical servers and virtual machines
- Managing the core network and transit/peering connections
- Managing the access network and firewalls
- Deployment, configuration and updates of OS and software (internally developed or open source)
- Troubleshoot any infrastructure-related issues
- Travel to data centres when required
- Liaising with suppliers and co-ordinating remote-hands support when needed
- Writing and maintaining documentation
- Conducting regular audits
Network Engineer / Systems Administrator - requirements
- Linux systems admin - Ubuntu, GNU, KVM
- Scripting skills - bash/python
- Good knowledge of routers, firewalls & switches - preferably Juniper
- Strong networking skills: IPv4, IPv6, MPLS, QoS
- Good understanding of security
- VoIP/SIP experience would be very nice to have
- Any exposure to Microsoft Teams would be a plus
On top of a competitive salary, there's a great benefits package which includes: -
Uncapped company profit share
Performance-related bonus
Free Broadband and Telecoms
33 days holiday including bank hols
Holiday buy back scheme and extra day off for your birthday
Infrastructure Specialist - System Administrator

Posted 9 days ago
Job Viewed
Job Description
At IBM CIC, we deliver deep technical and industry expertise to a wide range of public and private sector clients in the UK.
A career in IBM CIC means you'll have the opportunity to work with visionaries across multiple industries to improve the hybrid cloud and AI journey for the most innovative and valuable companies in the world. Your ability to accelerate impact and make meaningful change for your clients is enabled by our strategic partner ecosystem and our robust technology platforms across the IBM portfolio.
Curiosity and a constant quest for knowledge serve as the foundation to success here. You'll be encouraged to challenge the norm, investigate ideas outside of your role, and come up with creative solutions which impact a wide network of clients, whom may be at their site or one of our CIC or IBM locations. Our culture of evolution centres on long-term career growth and development opportunities in an environment that embraces your unique skills and experience.
We offer:
* Many training opportunities from classroom to e-learning, mentoring and coaching programs and the chance to gain industry recognized certifications
* Regular and frequent promotion opportunities to ensure you can drive and develop your career with us
* Feedback and checkpoints throughout the year
* Diversity & Inclusion as an essential and authentic component of our culture through our policies and process as well as our Employee Champion teams and support networks
* A culture where your ideas for growth and innovation are always welcome
* Internal recognition programs for peer-to-peer appreciation as well as from manager to employees
* Tools and policies to support your work-life balance from flexible working approaches, sabbatical programs, paid paternity leave, maternity leave and an innovative maternity returners scheme
* More traditional benefits, such as 25 days holiday (in addition to public holidays), online shopping discounts, an Employee Assistance Program, a group personal pension plan of an additional 5% of your base salary paid by us monthly to save for your future.
* Opportunity to work on cutting-edge AI projects and contribute to the development of our AI Lab platform.
* Collaborative and dynamic work environment.
* Professional growth and development opportunities.
If you're a motivated and experienced System Administrator looking for a new challenge, we'd love to hear from you!
**Your role and responsibilities**
We're seeking an experienced Infrastructure Specialist - System Administrator to join our AI Lab team. As a key member of our infrastructure team, you'll be responsible for designing, building, and maintaining our cloud-based platform to support the development and hosting of AI services. Your expertise will be crucial in ensuring the seamless operation of our applications, DevOps, middleware, security, and infrastructure components.
Key Responsibilities:
* Provide 24/7 technical support for cloud-based solutions, ensuring high availability and performance across various applications and infrastructure components.
* Design, build, and maintain infrastructure and configuration as code using tools like Ansible and Terraform.
* Administer Dev, Test, and Production environments hosted on Windows, Linux, and Unix servers.
* Ensure the security and integrity of our systems against cybersecurity threats.
* Troubleshoot and resolve technical issues involving APIs, application services, IaaS, PaaS, SaaS, microservices, containers, Kubernetes nodes, ICP management, middleware components, network, security, and infrastructure problems.
* Install and configure databases such as MYSQL, MSSQL, PostgreSQL, and others.
* Implement load balancing and CDN solutions using multiple cloud vendors (e.g., Azure Load Balancer and Application Gateway).
* Support the installation and maintenance of a logging cluster using Logstash, ElasticSearch, and Kibana.
* Perform initial analysis on incidents and escalate issues to the appropriate support level when necessary.
* Manage Application ID and provide cloud elasticity by auto-scaling resources based on business requirements.
* Ensure Disaster Recovery (DR) and manual redundancy failover capabilities.
* Provide regular service management reports to keep clients informed.
* Follow ITIL processes and Integrated Service Level Management best practices.
**Required technical and professional expertise**
* Strong experience in system administration, infrastructure management, and cloud computing.
* Proficiency in infrastructure as code tools like Ansible and Terraform.
* Experience with DevOps practices and tools.
* Strong knowledge of load balancing, CDN options, and cloud vendors (e.g., Azure).
* Experience with database administration (MYSQL, MSSQL, PostgreSQL, etc.).
* Familiarity with containerization (e.g., Docker) and orchestration (e.g., Kubernetes).
* Strong troubleshooting and problem-solving skills.
* Experience with ITIL processes and service management. Excellent communication and reporting skills.
**Preferred technical and professional experience**
* Experience with AI/ML workloads and infrastructure.
* Knowledge of cybersecurity best practices and threat mitigation.
* Familiarity with multiple cloud vendors (e.g., AWS, GCP, Azure).
IBM is committed to creating a diverse environment and is proud to be an equal-opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, gender, gender identity or expression, sexual orientation, national origin, caste, genetics, pregnancy, disability, neurodivergence, age, veteran status, or other characteristics. IBM is also committed to compliance with all fair employment practices regarding citizenship and immigration status.
Ecommerce System Administrator - Japanese Speaking
Posted 7 days ago
Job Viewed
Job Description
Vivienne Westwood is one of the most iconic British fashion brands, renowned for its heritage, innovative design, and commitment to culture and activism. We care deeply about our people and the environment, and our core values — Gaia, Quality not Quantity, Activism, Culture & Heritage — guide us daily. If you share our passion for creativity, sustainability, and innovation, we’d love to hear from you.
ABOUT THE ROLE
We are excited to offer an opportunity for a Ecommerce System Administrator - Japanese Speaking to join our Ecommerce team on a full-time basis for 12 months. This role will be based in our Merton office.
Overseeing the comprehensive enrichment, optimization, and management of digital assets and product data to guarantee precise, consistent, and robust data feeds across multiple online platforms and system environments, ensuring alignment with organizational standards and operational excellence.
KEY REPSONSIBILITIES
- Manage and oversee the B2C enrichment, and maintenance of digital assets across systems including PLM, DAM, PIM, SFCC platforms for B2C Japan locale and supporting APAC territories.
- Ensure the accuracy, consistency, and integrity of information across systems for digital assets,
- Develop and manage controls for seasonal and evergreen digital assets across category lines to ensure timely updates and strategic alignment with upload deadlines and website activities.
- Synchronise with the studio production team and Japanese stakeholders to manage publishing feeds and ensure timely updates and correct enrichment according to checklist and frequency.
- Monitor and manage digital assets across systems, ensuring proper organisation, tagging, and retrievability of images and other media. Carry out regular audits to ensure efficient version control
- Monitor system performance and troubleshoot issues related to product data and asset management, ensuring minimal downtime and efficient operation.
- Collaborate with cross-functional teams to gather requirements and integrate new product information, images, and assets into existing systems.
- Perform regular audits of product data and digital assets to maintain accuracy and compliance with internal standards. including images, coding, and text.
- Document system configurations, processes, and best practices for reference and team training.
- Stay updated with the latest trends and best practices in product data and digital asset management to enhance operational efficiency.
(Please note this is not an exhaustive list of duties and you may be required to perform additional duties to fulfil the requirements of the role)
PROFILE & KEY SKILLS
- Experience: 2 years in Asset Management and Data Input
Tools and Technologies:
- Product Lifecycle Management (PLM)
- Digital Asset Management (DAM)
- Product Information Management (PIM)
- HTML, XML
- SAP
- Excel
- Salesforce Commerce Cloud (SFCC)
- APIs
- Japanese (Mandatory) / Chinese (Preferred but not essential) / English (Mandatory)
BENEFITS
- Staff discounts
- Training
- Health & Wellbeing support (includes Private Medical Health Insurance, EAP, Gym Discounts, Access to Financial Planning Service, etc.)
- Perkbox membership: access to a wide range of perks, discounts, and wellness resources
- Cycle to work scheme
- Generous annual leave allowance
- Pension Scheme
- Opportunity to develop new skills and progress in your career
- Opportunity to work for a company that cares and believes in its people and the environment
Vivienne Westwood is an equal opportunity employer that is committed to diversity and inclusion in the workplace. We prohibit discrimination and harassment of any kind based on race, colour, sex, religion, sexual orientation, national origin, disability, genetic information, pregnancy, or any other protected characteristic as outlined by local government laws.
For our privacy statement please visit this link
Workday HRIS Analyst / System Administrator
Posted 7 days ago
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Job Description
Position: Workday HRIS Analyst / System Administrator
Location: Greater Slough (Predominantly in-office)
We're looking for a hands-on Workday HRIS Analyst / System Administrator to take ownership of our client’s Workday platform and act as the go-to expert across the business. This is a key role working at the intersection of HR and Systems, supporting day-to-day operations while driving system improvements and optimisations.
Role Responsibilities:
- Serve as the first point of contact for all internal Workday queries
- Own configuration and maintenance across core modules (HCM, Absence, Time Tracking, Talent, Payroll, etc)
- Manage internal support tickets and partner with external providers for escalations
- Collaborate cross-functionally to ensure data integrity and system efficiency
- Implement updates from Workday releases and enhance reporting/dashboard capabilities
- Uphold data security standards (e.g. GDPR) and manage user access
Ideal Candidate:
- Hands-on experience with Workday, especially HCM
- Strong troubleshooting, communication, and stakeholder management skills
- Experience working with external Workday/AMS partners
- A proactive, detail-oriented mindset and an understanding of HR data/processes
Nice to have experience:
- Experience supporting multi-functional or global Workday environments
- Familiarity with reporting, audits, and change governance
- Advanced Excel skills and Workday reporting experience
Ready to make a real impact in a fast-paced, collaborative environment?
Apply now or reach out directly to learn more.
We welcome applications from candidates of all backgrounds.
Please note that only candidates who are invited to interview will be contacted.
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