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...

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,...

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...

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...

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...

Responsibilities 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 advice and guidance as the subject...

A leading security firm is looking for a Site Security Controller in Luton for a 6-month contract. The role involves managing access, ensuring adherence to security policies, and coordinating with various teams regarding security-related matters. Candidates must have experience in a high security environment and be eligible for UKSV DV Security Clearance. This position pays up to £88 per hour,...

You will collaborate with cross‐functional teams to drive innovation and deliver exceptional value to our customers. Interview process - 4 stage Discovery conversation with our Talent Acquisition team.

You must either hold active SC or be eligible for SC: British Passport or ILR

You will assist in maximizing value for all parties through a deep understanding of legal, business, and commercial risks.

You will work closely with sales and delivery teams throughout the entire contract lifecycle, providing high-quality advice and support for negotiation, drafting, and ongoing management of client contracts.

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.

You must either hold active SC, or be eligible for SC: British Passport or ILR

You will own the relationship with one or more strategic accounts, manage projects from migration to platform engineering and AI enablement, and ensure Appvia becomes a trusted, long‐term strategic partner.

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...

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:

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. This position is located in London, working predominantly on the client's site.

Talent Acquisition Specialist @ CGI | Recruitment Strategy At CGI, you'll play a key role in advancing the secure, high‐performance platforms that support mission‐critical Space, Defence and Intelligence programmes. As a DevOps Engineer, you'll enhance automation, modernise delivery workflows, and strengthen the reliability of complex on‐premise systems that enable our clients to operate with...