Operational assurance consultants to the global energy industry

Douglas Hay founded ADC in 1986 to challenge what was deemed acceptable in the offshore industry.  His vision was to make the industry safer, cleaner and more efficient by providing independent assurance to Energy companies hiring rigs and vessels.

Douglas’ vision remains at the heart of what we do and is applied to rigs within the Oil and Gas sector, Geothermal or CCUS, in addition to the specialist vessels used to build wind farms of the future. Today our team of over 60 professionals are committed to driving safety, operational and environmental performance – supporting the majority of the world’s leading Energy companies.

Challenging The Status Quo for Over 38 years

Renewables at ADC


Providing operational assurance on complex vessels used in offshore wind farm construction and rigs used in Geothermal Drilling and Carbon Capture and Storage projects.


Operational Sectors

Renewables at ADC

Oil & Gas

Providing rig inspection and audit services of drilling rigs throughout the entire lifecycle. Specialising in drilling & marine equipment, BOP & well control equipment, cyber control systems and HSE management systems.


Global Client List

ENI Total Energies Cnooc Conoco Phillips New Fortress Energy Petronas Carigali PCSB Tullow Oil
Beach Ithaca  Energy Harbour Energy Seadrill EnQuest Wintershall Diamond Offshore
Stena Drilling Exceed Noble Vaalco Woodside OSRL Azule Energy


DNV GL Quality System Certification - ISO 9001:2015 SEQual