In addition to working with current clients, Sherry will help handle public relations for clients of other MacManus units like D'Arcy Masius Benton & Bowles Communications and Clarion Marketing and Communications.

The account, when it included fewer assignments, had been divided between Clarion Marketing and Communications, a D.M.B.& B. unit in Greenwich, Conn., and Ketchum Advertising San Francisco.

Constructed between 1969 and 1978 on 23 acres, its nine buildings were the headquarters of Anaconda Wire and Cable, Phelps Dodge, Continental Can, Clarion Marketing and United Parcel Service, among others.

The account had been handled on a project basis by Clarion Marketing and Communications in Greenwich, Conn., a unit of D'Arcy Masius Benton & Bowles.

She had held a similar post at Clarion Marketing and Communications, Greenwich, Conn., a unit of the McManus Group.

Miss Grossman, 28, is a vice president and a management supervisor at Clarion Marketing and Communications in Greenwich, Conn.

The two shops were selected after a review that also included Clarion Marketing and Communications of Greenwich, Conn., and the Pacific Marketing Group of San Francisco.

Clarion Marketing and Communications in Greenwich, Conn., owned by D'Arcy Masius Benton & Bowles, has acquired International Sports and Entertainment Strategies in Atlanta for undisclosed terms.

LEAD: * Ted Colangelo has announced his retirement as chairman of Clarion Marketing and Communications, an independent subsidiary of D'Arcy Masius Benton & Bowles.

Mr. Ellis is a management supervisor for Clarion Marketing and Communications in Greenwich, Conn.