This Glasgow-based company became independent in 2015 after demerging from the Denholm Group. It provides services such as maintenance, fabrication and decommissioning to energy companies from its bases in the UK, Middle East, Caspian Sea and America. Led by chief executive Michael Beveridge, 54, it offered deep cleaning services to clients in lockdown. Profits grew 92% to £28.6m last year, on sales of £191.2m.