Noble, Denton & Associates Inc., Houston, marine consultants and ocean engineers, a subsidiary of Noble, Denton & Associates Ltd. of London, recently announced the appointment of John C. Trickey as vice president. Mr. Trickey transferred from the London office where he was manager of engineering, and in his new role shall be responsible for all areas of the company's engineering activity. Mr. Trickey has been extensively involved in the offshore industry since 1973 in engineering, construction, and operations.