STS Defence Ltd

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STS Defence Ltd is a UK-based engineering and technology company in Gosport, Hampshire, part of the international Cicor Group, specialising in mission-critical secure communications, electronic warfare and control and instrumentation systems for the naval and air defence markets. The company offers full design services spanning electronic, electro-mechanical, software and systems engineering, alongside UK-based manufacturing: three SMT lines plus conventional through-hole assembly, aerospace wiring looms and subsea cable and connector solutions, sheet-metal fabrication, and box build through to sub-system integration. Testing spans AOI, X-ray inspection and environmental stress screening, and the company also provides integrated logistic support, installation and training services to the Ministry of Defence.

Box Build Assembly Cable & Wire Assembly Design & Engineering England Hampshire

PCB Assembly Prototyping & NPI

Certifications

AS9100 ISO 9001 ISO 14001 ISO 45001 ISO 27001 Nadcap JOSCAR IPC A-610 IPC J-STD-001 IPC/WHMA-A-620 Cyber Essentials

Services

Assembly Design Turn-key PCB Assembly Box Build Cable Assembly Fabrication PCB Testing Conformal Coating Obsolescence Management

Assembly Type

Surface Mount Thru Hole

Soldering Type

Leaded Solder Lead-Free (RoHS) Wave Soldering

Testing

Automated Optical Inspection (AOI) X-Ray Inspection Environmental Testing Visual Inspection

Package Type

BGA

Order Type / Volume

Prototype Low Volume Medium Volume

Box Build Capabilities

Electro-Mechanical Assembly Panel/Cabinet Build Final Product/System Test

Cable & Harness Assembly Capabilities

Wire Harness Assembly Discrete Cable Assembly

Industries Supported

Aerospace and Defense Marine

Component Sourcing / Procurement Model

Turnkey (Full Supply)

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Mumby Road, Gosport, Hampshire, PO12 1AF

Last Updated

2026-10-02

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Company Registration Number 03193298

Companies House URL

RSS Feed URL RSS Feed URL

Verification History

2 Oct 2026 — Scheduled verification (Lite). No changes.

23 Sep 2026 — Scheduled verification (Lite). Added Visual Inspection.

21 Sep 2026 — Scheduled verification (Regular). Added Cyber Essentials Plus certification renewal for 2026.

17 Sep 2026 — Scheduled verification (Max). No changes.

17 Sep 2026 — Listing added to EMS Directory, pending verification checks.

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