At the £50m turnover privately-owned family business, Shepherd will strengthen and implement strategic business change.
Shepherd spent nearly five years at Kier Northern, before that working as pre-construction director at GMI Construction Group for four years and Allenbuild for eight years before that.
Established for almost 30 years, Britcon directly employs 95 people on its project sites across the UK.
Britcon CEO Shaun Hunt, said: “Nick’s appointment comes at an exciting time for the business as we move towards our 30th year of trading.
“With plans to focus on specific sectors whilst maintaining traditional markets, Nick is a fantastic coup for the Britcon business and has all the right attributes and credentials to build upon its success and implement Britcon’s future growth strategy.”