security clearance jobs in London

The RoleWe are hiring Full-Stack Data Engineers across multiple levels (Junior through Senior Manager) to design, build, and deliver secure, scalable data solutions for complex client environments.This is a hands-on engineering role where you will work across data ingestion, transformation, operational workflows, and decision-support systems. You’ll partner closely with client stakeholders to...

You will collaborate with cross-functional teams to drive innovation and deliver exceptional value to our customers.

You must hold active UK Security Clearance to be eligible for this role.

About the Role Senior Director, National Security Space & Advanced Programs. As our Senior Director of National Security Space & Advanced Programs, you will lead efforts to define and execute Sierra Space's National Security Space growth strategy, oversee key customer interactions, and drive business development activities critical to accelerating the company's presence in this dynamic market....

A global Defence & Security company is seeking a Principal Hardware Engineer based in Surrey, UK. This role involves designing bespoke RF devices from concept to release, requiring expertise in schematic capture and eligibility for UK Security Clearance. The successful candidate will work onsite and may benefit from private healthcare, flexible lifestyle discounts, and a 10% bonus. Candidates...

A data-driven technology firm is seeking a UK Defence Sales Director to lead their strategy in the National Security and Defence sector. The ideal candidate will have a strong consultative sales approach, a proven track record in selling Enterprise software, and the ability to nurture client relationships. This role is key in expanding the company's presence within the public sector, working...

Position Description: Trusted to see the whole picture If you’re ahead of the game on cyber security, systems and operations risk we can secure your career ambitions. Our Security Architects are trusted to work closely with a wide range of clients from all sectors on exciting projects with real-world purpose and impact. Whether you're a self-starter looking to test your talents, or want the...

A security management firm in Luton is seeking a Site Security Controller for a 6-month contract. The role requires managing access for staff and visitors to a secure facility, ensuring compliance with security policies, and performing regular inspections. A high level of UK Security clearance is essential. Ideal for candidates experienced in security management within sensitive environments,...

You will be part of a culture that values trust, accountability, and shared success where your work truly matters.

You will work firsthand with our valued customers to address their complex post‐sales concerns where an in‐depth evaluation of many factors is required. You'll be a critical thinker in understanding the methods, techniques, and evaluation criteria for achieving results.

Contract Technical Pre Sales Cyber Security Healthcare Outside IR35 Contract | UK Remote | Healthcare Focus Existing SC clearance is required. Overview Seeking an experienced Technical Pre Sales Cybersecurity Consultant is required to deliver advisory and uplift services across complex healthcare organisations. This Outside IR35 contract operates on a consultancy basis, focused on improving...

A specialist talent acquisition consultancy is seeking a Site Security Controller in Southampton on a 6-month contract. The role involves managing secure access, ensuring compliance with security policies, and providing excellent customer service in a high-security environment. Candidates must have experience in similar roles and be eligible for UKSV DV Security Clearance. The position offers a...

A leading digital intelligence firm in London seeks a Senior Security Consultant (AI) to enhance national security through AI/ML systems. The role involves security assessments, advising on AI risks, and designing resilient architectures. Ideal candidates have strong cybersecurity backgrounds, experience with AI security, and relevant certifications. This position offers flexible hours, 25 days...

Lead Technical Account Manager (SC Security Clearance) Constantly go above and beyond to serve our customers and be a shining, standard-setting example of our Core Values. Triage, diagnose, and provide solutions to most complex configuration issues with Dynatrace solutions and non-Dynatrace integrations. Strategize on the overall technical objectives and long-term goals of the team. Provide...

A defense contractor is seeking an Information Systems Security Manager (ISSM) to support DoD cloud-based systems. The role requires active Top Secret clearance and involves implementing the Risk Management Framework to ensure systems' security. Ideal candidates will possess a Master's degree, IAM Level III certification, and extensive experience (15 years, 5 in DoD). This position offers...

A cybersecurity software firm seeks a High‐Integrity Software Engineer in Cheltenham to design innovative products and enhance existing solutions. Responsibilities include driving engineering processes and mentoring junior staff, requiring strong expertise in C and C++, alongside a Developed Vetting security clearance. The role offers comprehensive benefits, including health, financial support,...

Infrastructure Engineer (DV Security Clearance) Join to apply for the Infrastructure Engineer (DV Security Clearance) role at CGI . Secure Innovation is part of CGI's Space, Defence and Intelligence business unit, focused on the delivery of contemporary and innovative technical solutions for the client's most challenging problems. Our teams work alongside clients to help them understand how to...

Position Description: CGI’s Space, Defence, and Intelligence business unit is dedicated to delivering cutting-edge technical solutions that address the most complex challenges faced by government agencies. Our mission-critical systems are custom-built to ensure security, reliability, and innovation, helping our clients protect the nation and its people. We are currently seeking a Tech Lead to...

You will either hold a higher level clearance or be willing to obtain it. Any individual without security clearance is welcome to apply and will always be considered for this or wider opportunities in CGI, where appropriate. Your future duties and responsibilities:

Technical Architect (DV Security Clearance) CGI's Space, Defence, and Intelligence business unit is dedicated to delivering cutting-edge technical solutions that address the most complex challenges faced by government agencies. Our mission-critical systems are custom-built to ensure security, reliability, and innovation, helping our clients protect the nation and its people. We are currently...

You will either hold a higher level clearance or be willing to obtain it. Any individual without security clearance is welcome to apply and will always be considered for this or wider opportunities in CGI, where appropriate. Your future duties and responsibilities:

You will either hold a higher level clearance or be willing to obtain it. Any individual without security clearance is welcome to apply and will always be considered for this or wider opportunities in CGI, where appropriate.

You will be required on site in London 5x per week.