Bill Thomas is the Chairman of the Royal Navy and  Royal Marines Charity. He is also the Chairman of Spirent Communications plc and Node4, a PE owned IT Services firm. He serves as a NED on the Co op Bank plc and is also a member of the International Advisory Board of FireEye Inc.

He has previously served as a NED on the boards of GFI Sarl, XChanging plc, Balfour Beatty plc and VFS Global.

Under Ed Miliband he assembled Labours defence advisory board comprising former 4 star officers. He chaired the Labour Party's Small Business Taskforce and its Independent Review into Defence Procurement. He also served on the Labour Party's Skills Taskforce.

He chaired the International Advisory board of Cranfield School of Management and as Alumni President, serves on the Cranfield University Council.

As Senior Vice President and General Manager of Hewlett Packard he led HPs EMEA service business and served for 9 years on the President's committee of the CBI.

Together with Julie, he is the joint proprietor of Hopton Estates in Derbyshire.