507 Security jobs in Heathrow

**Description**
**Cyber Security Engineer (T4)**
**Location: F/T Onsite to Farnborough, UK**
**Clearance Level: High - Developed Vetting (DV)**
At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers' success. We empower our teams, contribute to our communities, and operate sustainably. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community. Our Mission, Vision, and Values guide the way we do business.
**Are your ready for your next challenge?**
Leidos is seeking a Cyber Security Engineer with an extensive background as an infrastructure engineer, coupled with proven skills in coding. This role is designed for an individual who is keen on leveraging their technical expertise to fortify the security framework within a dynamic environment. The role will lead initiatives to integrate security at every phase of the development lifecycle, ensuring the robustness and compliance of our applications and infrastructure. In this role, you will be working across both infrastructure and security space reporting into the System Technical Lead and the Cyber Security Engineering Lead.
**Key Responsibilities:**
**COTS Application Updates:** Support the update process for Commercial Off-The-Shelf (COTS) applications, ensuring compatibility and security.
**Vulnerability Scanning:** Conduct regular assessments of environments to identify vulnerabilities.
**Security Definition Updates:** Manage and update security definitions across our platforms to protect against emerging threats.
**Vulnerability Analysis:** Analyse vulnerability assessment reports and implement necessary changes.
**Security Daily Checks:** Perform thorough daily checks of security components to ensure operational integrity.
**System Health Checks:** Conduct daily system health checks to ensure servers are functioning optimally.
**Capacity Checks & Reporting:** Monitor and report on local system capacity, suggesting improvements where necessary.
**Patching:** Support application patching to resolve security issues and enhance system performance.
**Log Management:** Oversee log archiving and deletion processes to maintain a streamlined log management system.
**Account Management:** Update local admin account passwords and manage account policies to maintain security.
**Resource and System Monitoring:** Implement and manage resource and system monitoring tools and practices.
**Backup Management:** Ensure local server backups are conducted regularly and effectively.
**Documentation and SOPs:** Review and update engineering and design documents and standard operating procedures periodically.
**Reboots and Preventative Maintenance:** Schedule and execute server and application reboots as part of preventive maintenance.
**Platform Health Check:** Perform full audits of all technologies for interoperability and patch compliance.
**PKI and Secrets Management:** Oversee the daily checks of Public Key Infrastructure and manage the lifecycle of secrets securely.
**Vulnerability Assessment:** Execute comprehensive vulnerability scanning on all applications and lead the analysis and triage of findings.
Code Review: Review code for potential security issues prior to production releases.
**Essential Process Skills/Experience**
+ Infrastructure hardening/maintenance/engineering
+ Working experience in one or multiple of the following disciplines:
+ Microsoft & Linux/Unix
+ Virtualisation technologies (VMWare)
+ Endpoint Security Products (e.g. Symantec, Trellix)
+ Network Security (Firewalls)
+ Vulnerability Scanning
+ Code Analysis (Java, PowerShell etc)
**Desirable Experience**
+ Experience working in both delivery and proposal environments.
+ Experience working in MOD or Home Office project environments.
+ Proven track record as a 3rd line infrastructure engineer
+ Solid experience in developing and automating processes.
+ Working knowledge of SecDevOps tools and methodologies.
+ Excellent analytical and problem-solving skills.
+ Strong communication and documentation abilities.
+ Hands on experience with SIEM solutions i.e. Splunk, ArcSight, LogRhythm
**Communication and Soft Skills**
+ Experience speaking to and working with leadership as well as ability to write reports and present in security working groups
+ Excellent verbal and written communication skills and works well in a team environment
+ Capable of developing and communicating reports to meet defined objectives for intended audience
+ A good level of commercial awareness and project disciplines
**Candidate Essentials**
British - Non-dual national - many of our projects have nationality restrictions
DV cleared or willing to go through DV Clearance
Are you ready to make an impact? Begin your journey of a flourishing and meaningful career, share your CV with us today!
Everything we do is built on our commitment to do the right thing for our customers, our employees, and our communities. Learn more about the values and culture that are the foundations of our business. Our work in the United Kingdom includes addressing some of the most complex problems in national security, defence, government, logistics and operations, transportation, and energy.
**What we do for you:**
At Leidos we are PASSIONATE about customer success, UNITED as a team and INSPIRED to make a difference. We offer meaningful and engaging careers, a collaborative culture, and support for your career goals, all while nurturing a healthy work-life balance.
We provide an employment package that attracts, develops and retains only the best in talent. Our reward scheme includes:
- Contributory Pension Scheme
- Private Medical Insurance
- 33 days Annual Leave (including public and privilege holidays)
- Access to Flexible benefits (including life assurance, health schemes, gym memberships, annual buy and sell holidays and a cycle to work scheme)
- Access to Flexi-time benefits
Commitment to Diversity:
We welcome applications from every part of the community and are committed to a truly diverse and inclusive culture. We foster a sense of belonging, welcoming all perspectives and contributions, and providing equal access to opportunities and resources for everyone. If you have a disability or need any reasonable adjustments during the application and selection stages please let us know, and we will respond in a way that best fits your needs.
Who We Are:
Leidos UK & EUROPE - we work to make the world safer, healthier, and more efficient through technology, engineering and science.
Leidos is a growing company delivering innovative technology and solutions focused on safeguarding critical capabilities and transformation in frontline services, our work in the United Kingdom includes addressing some of the most complex problems in defence, healthcare, government, safety and security, and transportation.
What Makes Us Different:
Purpose: you can use your passion and abilities at Leidos to keep the people you care about safe. We are at the forefront of machine learning, AI, cyber security and solutions. Using your skills in the technology frontline by helping to build a safer world. You can inspire change.
Collaboration: having flexibility to do your job is one of our core benefits, enabling you to become part of our extraordinary team. We have been empowering our people to work flexibly for years. Whether you work from home, the office or on customer sites, we will give you the digital tools and the flexibility to work smarter and align your needs and ours.
People: Leidos empowers people from every background to be themselves and gives you the tools to learn new skills by enabling growth whilst developing. We believe that extraordinary people need opportunities to grow, to be inspired and to inspire others. At Leidos, we invest in technical academies, career rotations and a career development plans that enhance your future.
Come break things (in a good way). Then build them smarter.
We're the tech company everyone calls when things get weird. We don't wear capes (they're a safety hazard), but we do solve high-stakes problems with code, caffeine, and a healthy disregard for "how it's always been done."
**Original Posting:**
For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
**Pay Range:**
£60,100.00-£77,000.00
The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.
REQNUMBER: R-
All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status. Leidos will consider qualified applicants with criminal histories for employment in accordance with relevant Laws. Leidos is an equal opportunity employer/disability/vet.

**The team you'll be working with:**
Flexible remote-working options
As a Security Consultant (Architecture) at NTT DATA, you will collaborate with clients and stakeholders to design, implement, and validate secure architectural solutions across infrastructure, cloud, and application environments. Leveraging your expertise in risk assessment and governance frameworks such as ISO 27001, NIST, or CIS, you will deliver cutting-edge strategies that address evolving threat landscapes while ensuring alignment with business objectives. This role provides a unique opportunity to guide clients in embedding security into foundational designs while supporting compliance and risk mitigation efforts.
**Please note that to be considered for this role, you must be eligible for SC clearance.**
**What you'll be doing:**
Core Responsibilities
Security Architecture and Delivery
+ Translate business and compliance requirements into practical, well-documented security architecture designs using recognized frameworks (e.g., ISO 27001, NIST, CIS).
+ Develop, document, and maintain consistent secure architectural patterns with an emphasis on cloud security (AWS, Azure, GCP).
+ Leverage threat modeling techniques to design and implement zero-trust architectures and defense-in-depth strategies, proactively addressing security gaps and enhancing system resilience.
+ Maintain alignment between security policies, enterprise architecture principles, and client expectations.
Risk and Threat Management
+ Conduct comprehensive risk assessments and threat modeling to evaluate existing or proposed architectures for vulnerabilities.
+ Provide actionable mitigation strategies informed by a risk-based approach and evolving threat intelligence data.
+ Participate in or support incident response initiatives, aiding in root cause analysis and the development of post-incident recommendations.
Client Engagement and Technical Leadership
+ Act as a trusted advisor to clients by engaging in technical discussions to inform strategic security decisions.
+ Collaborate cross-functionally with development, operations, and engineering teams to validate that security controls are effectively implemented across the development lifecycle.
+ Deliver technical insights in presentations, workshops, and reports tailored to both technical and executive audiences.
Security Compliance and Governance
+ Engage in audits, assessments, and reviews to ensure delivery meets strict alignment with industry frameworks.
+ Provide clients with guidance on the implementation and enforcement of technical standards and cloud-specific security policies.
+ Maintain up-to-date knowledge of regulations and frameworks such as NIS2 and DORA to address compliance risks and initiatives.
+ Recommend improvements in security policies based on compliance evaluations and evolving risks.
Continuous Improvement and Innovation
+ Contribute to the development of security roadmaps by delivering expert recommendations tailored to each client's security objectives.
+ Assess emerging technologies and threats, identifying opportunities to evolve architectural strategies through innovation and cutting-edge tools.
+ Participate as an SME in pre-sales activities, assisting in defining technical collateral that supports project delivery.
**What experience you'll bring:**
Required Qualifications
Expertise and Technical Knowledge
+ Minimum 5 years' experience in security architecture, compliance, and cloud security roles, working with frameworks such as ISO 27001, NIS/NIS2, or NIST CSF.
+ Deep understanding of cloud security principles including management on AWS, Azure, and GCP platforms.
+ Familiarity with IAM, CASB, SIEM, and container security solutions.
Professional Certifications
+ CISSP or SABSA certifications required.
+ Cloud-specific certifications preferred (e.g., AWS Security Specialty, Azure Solutions Architect).
+ Direct experience working in government, military, or intelligence organizations advantageous.
Professional and Interpersonal Skills
+ Proven ability to collaborate across diverse technical teams, influencing senior stakeholders in an advisory capacity.
+ Excellent communication and presentation skills for delivering complex technical concepts to non-specialist audiences.
+ Strong analytical thinking and the ability to rapidly assess risks in a given architecture framework.
Preferred Qualifications
+ A bachelor's degree in information security, Cybersecurity, or a relevant IT field (Master's degree preferred).
+ Previous hands-on experience in developing security frameworks and implementing architectural changes at scale.
+ Ability to conduct cloud security posture assessments to identify misconfigurations early.
Success Metrics (6-12 Months)
+ Deliver complete secure architectures for a minimum of five client engagements, with post-delivery client feedback exceeding 90% satisfaction.
+ Achieve measurable improvement in compliance alignment (benchmarked on project KPIs) and reduce risks for client infrastructure by 20%.
+ Facilitate at least three training sessions for stakeholder groups, ensuring baseline compliance awareness.
**Who we are:**
We're a business with a global reach that empowers local teams, and we undertake hugely exciting work that is genuinely changing the world. Our advanced portfolio of consulting, applications, business process, cloud, and infrastructure services will allow you to achieve great things by working with brilliant colleagues, and clients, on exciting projects.
Our inclusive work environment prioritises mutual respect, accountability, and continuous learning for all our people. This approach fosters collaboration, well-being, growth, and agility, leading to a more diverse, innovative, and competitive organisation. We are also proud to share that we have a range of Inclusion Networks such as: the Women's Business Network, Cultural and Ethnicity Network, LGBTQ+ & Allies Network, Neurodiversity Network and the Parent Network.
For more information on Diversity, Equity and Inclusion please click here: Creating Inclusion Together at NTT DATA UK | NTT DATA ( we'll offer you:**
We offer a range of tailored benefits that support your physical, emotional, and financial wellbeing. Our Learning and Development team ensure that there are continuous growth and development opportunities for our people. We also offer the opportunity to have flexible work options.
You can find more information about NTT DATA UK & Ireland here: are an equal opportunities employer. We believe in the fair treatment of all our employees and commit to promoting equity and diversity in our employment practices. We are also a proud Disability Confident Committed Employer - we are committed to creating a diverse and inclusive workforce. We actively collaborate with individuals who have disabilities and long-term health conditions which have an effect on their ability to do normal daily activities, ensuring that barriers are eliminated when it comes to employment opportunities. In line with our commitment, we guarantee an interview to applicants who declare to us, during the application process, that they have a disability and meet the minimum requirements for the role. If you require any reasonable adjustments during the recruitment process, please let us know. Join us in building a truly diverse and empowered team.
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Why work for us?
A career at Janus Henderson is more than a job, it's about investing in a brighter future together.
Our Mission at Janus Henderson is to help clients define and achieve superior financial outcomes through differentiated insights, disciplined investments, and world-class service. We will do this by protecting and growing our core business, amplifying our strengths and diversifying where we have the right.
Our Values are key to driving our success, and are at the heart of everything we do:
Clients Come First - Always | Execution Supersedes Intention | Together We Win | Diversity Improves Results | Truth Builds Trust
If our mission, values, and purpose align with your own, we would love to hear from you!
Your opportunity
Janus Henderson Investors' Information Security team strives to be on the cutting edge of technology and on top of the latest threats. As an Information Security Architect your contribution is invaluable to the team. You will be key to ensuring our business partners follow our best practices, while designing and helping implement cutting edge cloud security solutions.
+ Serve as the primary liaison with Information Security, the Infrastructure Cloud team, and the business.
+ You will collaborate with security engineers performing detailed analysis' in line with our current security standards.
+ Work closely with key stakeholders and technical teams in building essential relationships with strong communications across the organization while ensuring our business adheres to the security standards.
+ Document existing security architecture and relevant tools
+ Advise and support cloud security initiatives.
+ Plan, research, and design security architecture for new and existing Cloud systems
+ Represent and Contribute to Architectural Governance Community of Practice
+ Participate in the security solutions design and implementation for the information security team. Provide hands-on direction to develop efficient and scalable solutions that align with the company's business objectives.
+ Advise on mitigation for potential risks and ensure that designs comply with relevant laws, regulations, and standards through considering governance, compliance, and risk management.
+ Ensure consistent administration of information security policies, standards, procedures, and controls to effectively improve security posture.
+ Assisting developers and systems administrators in designing and evaluating secure solutions
+ Undertaking heightened threat modelling when required
What to expect when you join our firm
+ Hybrid working and reasonable accommodations
+ Generous Holiday policies
+ Excellent Health and Wellbeing benefits including corporate membership to ClassPass
+ Paid volunteer time to step away from your desk and into the community
+ Support to grow through professional development courses, tuition/qualification reimbursement and more
+ All-inclusive approach to Diversity, Equity and Inclusion
+ Maternal/paternal leave benefits and family services
+ Complimentary subscription to Headspace - the mindfulness app
+ All employee events including networking opportunities and social activities
+ Lunch allowance for use within our subsidized onsite canteen
Must have skills
+ Broad Microsoft Azure knowledge
+ 3+ year of information security experience
+ 5+ years of general IT infrastructure knowledge (servers, OS, networking, etc)
+ Excellent communication skills
+ 5+ years of infrastructure architecture experience
+ Experience working with various IT Teams and non-IT teams of various disciplines.
+ The ability to assimilate complex technical challenges and provide appropriate security advice that delivers the right business outcomes
+ Practical experience reviewing engineering designs and enhancing security solutions against company standards
Nice to have skills
+ Any Azure certifications
+ Any information security related certifications
+ 5+ years in IT Solution Architecting
+ Experience working in Financial Industries
+ Willing to Supervise if needed
+ 5+ years of information security experience
Supervisory responsibilities
+ No
Potential for growth
+ Mentoring
+ Leadership development programs
+ Regular training
+ Career development services
+ Continuing education courses
You will be expected to understand the regulatory obligations of the firm, and abide by the regulated entity requirements and JHI policies applicable for your role.
At Janus Henderson Investors we're committed to an inclusive and supportive environment. We believe diversity improves results and we welcome applications from all backgrounds. Don't worry if you don't think you tick every box, we still want to hear from you! We understand everyone has different commitments and while we can't accommodate every flexible working request we're happy to be asked about work flexibility and our hybrid working environment. If you need any reasonable accommodations during our recruitment process, please get in touch and let us know at
#LI-LN2 #LI-HYBRID
Janus Henderson (including its subsidiaries) will not maintain existing or sponsor new industry registrations or licenses where not supported by an employee's job functions (as determined by Janus Henderson at its sole discretion).
All applicants must be willing to comply with the provisions of Janus Henderson Investment Advisory Code of Ethics related to personal securities activities and other disclosure and certification requirements, including past political contributions and political activities. Applicants' past political contributions or activity may impact applicants' eligibility for this position. Janus Henderson is an equal opportunity /Affirmative Action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status. All applications are subject to background checks.