The contractor has merged its sustainability, environment and energy division with its health and safety department.
Balfour Beatty health and safety director Heather Bryant will head up the merged team in the newly created role of health, safety, environment & sustainability director.
Mr Toyne exited the business at the end of May as a result of the changes.
In a statement emailed to staff last month, Balfour Beatty group HR director Paul Raby said: “This move recognises the clear links between what we do to ensure the health and safety of our colleagues, customers and members of the public, and the activities we undertake to support and protect the communities and environments in which we work.
“It provides a great opportunity for the teams to collaborate relentlessly and take forward the strong work we’ve already seen in both areas – and clearly supports our Build to Last goals of lean, expert, trusted and safe.”
He added: “As a result of this change, Paul Toyne, director of sustainability, will leave the business at the end of May, following a handover with Heather.
“Paul leaves with our thanks for his valued contribution to this business and with our best wishes for the future.”
My Toyne had been with the company for three years, according to his LinkedIn profile.
He sat on a number of industry groups including the green Construction Board’s Carbon Infrastructure Working Group. He also chaired the Constructing Excellence Sustainability Group.