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Developing, delivering, and supporting advanced, open, and cost-effective defence solutions that make our world safer

Engineered to Protect.

SEA is part of the Cohort Group

We are SEA. Together, through teamwork, collaboration and innovation, we’re delivering operational advantage to our customers while building a more sustainable future for all.

What we do

Type 23 Frigate 1 Frigate Icon Ship & Fleet Protection
Astute Submarine 4 Submarine Icon Undersea Battlespace
Type 23 Frigates X2 Advanced Technology Integrated Maritime Systems
SEA April 22 2025 275 (1) Future Thinking Maritime Support & Services

Latest News

Five Minutes with Lynne Goodman 01 Oct 2026 Five Minutes with Lynne Goodman We caught up with Lynne Goodman, HR, to learn more about her work, her professional development, and the value she places on supporting people. Read more
SEA Provides Additional Hydrophones for Oshen C-Stars, to Enable Enduring Wide Area Acoustic Sensing Capability 30 Sep 2026 SEA Provides Additional Hydrophones for Oshen C-Stars, to Enable Enduring Wide Area Acoustic Sensing Capability Supporting the development of a scalable, affordable, and low-signature sensor network. Read more
Vice Lord-Lieutenant of Somerset Presents SEA with King’s Award for International Trade 17 Sep 2026 Vice Lord-Lieutenant of Somerset Presents SEA with King’s Award for International Trade The King’s Award for International Trade recognises UK businesses that have demonstrated exceptional growth in overseas earnings and commercial year-on-year growth over a period of three or six years. Read more
Five Minutes With Eryk Marczak 26 Aug 2026 Five Minutes With Eryk Marczak We checked in with Systems Engineer Eryk Marczak to find out more about his role at SEA. Read more

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Head Office Address
Systems Engineering & Assessment Ltd,
Beckington Castle, 17 Castle Corner, Beckington, Frome, Somerset BA11 6TA

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