Cohort is the parent company of five innovative, agile and responsive businesses providing a wide range of services and products for British, Portuguese and international customers in defence, security and related markets.

Cohort was founded on the principle that SME-size businesses can prosper by being part of a larger group, where they can benefit from financial oversight, management support and the exchange of information and practices. We aim to achieve this while preserving the high growth potential of innovative independent businesses. We aim to add real value through the experience and contacts of our senior team while providing a light-touch but effective governance framework to our subsidiaries. Our objective is to deliver value to shareholders through our five operating subsidiaries: Chess, EID, MASS, MCL and SEA.

The headquarters of the Cohort Group are in Reading, Berkshire and in total we employ around 950 core staff there and at our other operating company sites across the UK and in Portugal.

Our mission

To build and operate a group of companies applying advanced technology in defence, security and related markets and combining the innovation and responsiveness of smaller, independent businesses with the stability, shared knowledge, wider market access and lower funding costs of a listed group to provide enduring benefits to customers, employees and shareholders.

Our Businesses 


Chess is a leading supplier of electro-optical and electro-mechanical systems to the defence and security markets.


EID designs and manufactures advanced communications systems for the defence and security markets.


MASS is a data technology company serving the defence and security markets.


MCL designs, sources and supports advanced electronic and surveillance technology.


SEA delivers products and services into the defence, transport and offshore energy markets using systems, software, acoustic, and electronics engineering.

Armed forces Covenant 

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