Cullum McAlpine

Sir Robert McAlpine Enterprises Ltd. operates as a holding company. The company was founded in 1978 and is headquartered in Hemel Hempstead, GB.

Newarthill Ltd. provides building construction and civil engineering services. The company was founded on April 21, 1972 and is headquartered in Hemel Hempstead, the United Kingdom.

Part of Sun Life Financial, Inc., Blary Hill Energy Ltd. is a British company that provides wind electric power generation services. The company is based in Hemel Hempstead, UK. Founded in 2015. Blary Hill Energy was acquired by The Renewables Infrastructure Group Ltd. on March 31, 2020.

Part of Partnership Accumulation Ltd, Abacus Projects Ltd. is a UK construction and civil engineering company founded in 1869. The company is based in Hemel Hempstead, UK. Abacus Projects designs, develops, builds, and preserves some of the UK's most iconic buildings.

Partnership Accumulation Ltd operates as a private equity firm. The company was founded on February 25, 1999 and is headquartered in Hemel Hempstead, the United Kingdom.