Mr Simcoe held the position of State Secretary of the Builders Labourers Federation (BLF) in Queensland for 18 years, prior to his retirement in late 2010. He was one of the longest serving State Secretaries of BLF Queensland.

His current positions include Chairman of the Building Employees Redundancy Trust, Chair of the Construction Income Protection Fund, Chair of the Construction Skills Training Centre, Director of BUSSQ (Super Fund), Director of the Queensland Construction Training Fund, and Vice President of CFMEU Construction and General Division.

He has also been a Trustee Member of the Australian Institute of Superannuation Trustees, Branch Secretary of the Construction, Forestry, Mining and Energy Union (CFMEU) Construction and General Division.