About STS Defence

STS Defence are specialists in mission-critical communications and intelligent systems. We focus on customer value and satisfaction, working in partnership with customers to deliver solutions that make a difference.


STS Defence is a wholly-owned subsidiary of Key Technologies Ltd, a UK based specialist engineering Group, focused on two core market sectors: Defence and Homeland Security.

At a glance

150 staff based at facilities in Gosport and Great Yarmouth
Over 6,000 m2 of secure facilities
Quality measures consistently greater than 99.8%
First company in Europe to gain Nadcap accreditation for both circuit card and cable
Building Typhoon fighter aircraft cockpit assemblies for more than 20 years
Manufacturing electronic guidance components for the world’s most widely used anti-tank missiles
Design authority for the tallest structure on the Royal Navy Type 45 Destroyer

Supporting you across the life-cycle

Wherever your project is on the development lifecycle, you can access our expertise and resources at other stages, adding further value and creating the best possible outcome.

Our values

Customer Focus

We develop strong relationships with a clear understanding of our customers’ needs that enable us to go above and beyond.


We empower our staff and teams to be accountable and responsible to complete the job to the best levels of quality, time and cost.


Our workforce develops through experience, teamwork and training. We value diversity, openness, equality, respect and passion.

An assured service

We want to ensure that you always get a consistently high standard of service. In addition to our other accreditations, we were the first company in Europe to gain NADCAP certification for both AC7120 (Circuit card assembly), and AC7121 (Cable & Harness).
  • Armed Forces Covenant Employer Recognition
  • AS9100D – Quality Management in aerospace sector
  • Cyber Essentials Plus – Cyber Security
  • ISO14001:2015 – Environmental Management
  • ISO9001:2015 – Quality Management System
  • NADCAP AC7120 – Circuit Card Assembly
  • NADCAP AC7121 – Cable & Harness
  • OHSAS 18001:2007 – Occupational Health & Safety Management

Meet some of the team


Max is part of our Business Development team, specialising in developing training solutions.


Paul is part of our training team, and is currently delivering training to the nuclear sector.


Nathan is one of our Research Engineers, currently working on R&D projects.


Currently Engineering Coordinator, Dierk has been with us for just over 30 years.

Work with us

Wherever you are in your career, STS Defence is a great place to work. We offer a competitive benefits package and a career development programme that will let you reach your full potential.

Working with us also means enjoying life outside of the office. With facilities in Portsmouth and Great Yarmouth, you and your family can enjoy great amenities, schools and fantastic surroundings.

Opportunities for apprentices and graduates

We work very closely with universities and colleges. Part of this relationship is in providing opportunities for students currently studying and those who have recently graduated to work in industry, developing their knowledge and applying their skills to real-world applications.

Register your interest

Current opportunities

Installation Fitter

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The purpose of this role is to undertake the electrical/mechanical fitting of a broad range of electrical equipment, predominantly to maritime platforms and MOD establishments, within the UK and abroad....
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Integration Design Engineer

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Work as part of the Integration Design Team in the Design Department. The Integration Design Engineer produces Installation Solution’s (ISs), Equipment Guidance Package’s (EGPs), Installation Guidance Information (Level 1, 2...
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Project Engineer

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The primary purpose of this role is to act as a customer-facing Project Engineer in various sites (including military establishments), providing subject matter expertise and technical support to the customer...
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Project Manager

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The Project Manager (PM) is responsible for the successful delivery of a variety of engineering Projects, as delegated by the Programme Manager. The PM provides disciplined, repeatable Project Management output,...
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Systems Engineer

By | Vacancies
The delivery of Engineering Support to contracts including Maritime Multi Media (MMM) and UHF SATCOM equipment installed on Royal Naval ships, submarines and shore establishments to agreed timescales and budgets,...
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Interested in working at STS Defence but haven’t seen a role that takes your fancy? If you think you have the skills and the passion to be part of our team then send us your CV today.