Our Subsidiaries
CSA International, Inc.
CSA International, Inc. (CSA) CSA International, Inc. (CSA) specializes in marine sciences and services, with business lines focusing on the following industries:
- Energy Industry
- Coastal Permitting
- Coastal Restoration and Mitigation
- Coastal and Ocean Sciences
- Navy
- Marine Services
- Planning
Technology Systems Corporation
Technology Systems Corporation (TSC) provides unparalleled marketing solutions for the ocean industry through two specialized trade magazines and three focused conference/exhibitions. In addition to publishing and conferences, TSC has an online store called Sea Catalog that offers hundreds of marine-related books and products for sale to the industry.
- Ocean News and Technology Magazine
- Offshore Source Magazine
- Book and Merchandise Sales
- Offshore Communications Conference
- EnergyOcean Conference
- Offshore Positioning & Mapping Conference
- Seminars
Ocean Specialists, Inc.
Ocean Specialists, Inc. (OSI) provides services to clients in the ocean industry ranging from project consulting for development of offshore telecommunications systems and undersea technology to corporate management and marketing services. OSI’s clients range from oil and gas producers to telecommunications providers, as well as government and scientific interests.
- Ocean Engineering Support Services
- Strategic and Market Planning
- Product/Technology Development
- Market and Technical Studies
- Mergers and Acquisitions, Management Consulting

Continental Shelf Associates, Inc. (CSA Group) is a multidisciplinary U.S. corporation established in 1970. Dedicated to the ocean industry worldwide, it services the offshore oil & gas, submarine telecom, and scientific markets as well as Federal, State, and local governments. The following are wholly owned subsidiaries under the CSA Group umbrella.