CHARTWELL REINSURANCE CO. (Stamford, Conn.) - Bruce L. Kessler joined as vice president in the Specialty Treaty Department.

Mr. Kessler most recently worked for Nac Re as an assistant vice president in the Treaty Underwriting Department. He was involved in the production and underwriting of property and casualty reinsurance.Before he worked for Nac Re, Mr. Kessler served as an assistant vice president for General Reinsurance Corp. in the Casualty Facultative Department.

LLOYD'S OF LONDON (London) - Isabel Hudson was appointed European manager with the international department of the Corp. of Lloyd's, effective Oct. 11. She will be responsible for the development of Lloyd's business within the European Community.

Mrs. Hudson joins Lloyd's from Royal Insurance Group where she held a number of positions in the United Kingdom, Germany and Italy. Most recently, Mrs. Hudson was the European development manager of Royal Global, where she prepared a business plan for Europe and identification of opportunities including creation of a network of underwriting offices.

ROYAL GROUP INC. (Charlotte, N.C.) - James F. Noonan was named senior vice president of Royal Insurance and will assume the title of chief investment officer of Royal when Laurance E. Masters retires in 1994, no specific date was given.

Mr. Noonan is currently senior vice president and chief investment officer of Royal Maccabees Life Insurance Co. and president of Royal Investment Management Co., both units of Royal Financial Services in Southfield, Mich. He will retain those titles.

Mr. Noonan joined Royal's life operations in Southfield, Mich., in 1989 when he returned from London, where he was managing director of Chase Investors International.