Norman Walker Drummond

Denholm Oilfield Services Ltd. provides oil and gas services. The firm offers asset maintenance, decontamination, decommissioning, energy logistics, electrical and installation, heavy and light fabrication, metrology and calibration, precision engineering, machining and welding, valve sales, management, repair and maintenance services. The company was founded in 1866 and is headquartered in London, the United Kingdom.

Denholm 9SJ Ltd. provides logistics services and solutions to shipping industries. Its services include integrated logistical solutions, port and marine services, ship agency, freight forwarding, container transportation and management. The company is headquartered in Glasgow, the United Kingdom.