Mongoose Atlantic Inc. | 36 followers on LinkedIn. Established in 1999, Mongoose Atlantic is a part of a global advertising sales agency with offices in New York, London, Mumbai and Kuala Lumpur. Our New York office represents a number of renowned publications including Newsweek Magazine, the Learning Network including Questia.com, HighBeam.com, and Encyclopedia.com, and The Kaplan "How to Get into College" Guide.