Kenneth Seropian, Ryan Campagna and Jeffrey Bernier were appointed to new positions at Sentinel Benefits Group Inc., Wakefield, Mass. Messrs. Seropian and Campagna will be consultants; Mr. Bernier, investment consultant. Mr. Seropian was director of investment services at Cook & Co., Marshfield, Mass., which is seeking his replacement. Mr. Campagna was an account representative at Grigsby & Smith Financial Advisors, Pittsfield, Mass. Mr. Bernier was an intern with HarbourVest Partners, Boston.