He will travel with the Colchester squad for Saturday's League One match with Cheltenham, although former Wales international Kit Symons, who has been caretaker manager while the club sought a replacement for fellow Welshman Williams, will take charge of team affairs for one final time.
As a player Lambert won 40 caps for Scotland and had spells with Celtic, St Mirren, Motherwell and Borussia Dortmund.
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.