IMCA is the international trade association representing offshore, marine and underwater engineering companies.

With membership as at June 2008 standing at over 490 companies in more than 50 countries, IMCA has grown fourfold since its establishment in 1995 in terms of both members and geographical spread.

Membership is open to companies and organisations active in the offshore, marine and underwater engineering industries. Separate categories of membership exist for contractors; suppliers of equipment and services, consultancies, training providers and personnel agencies; and non-voting, corresponding members including oil and gas companies, government agencies and other associations.