New positions
* Duron Inc., Maryland-based makers of paints and wall coverings, announced the appointment of Thomas K. Schwartzbeck as chief operating officer and executive vice president.
* Baltimore International Culinary College appointed Daryl Burchfield food and beverage director of its Mount Vernon Hotel and Washington Cafe. Named assistant innkeeper at BICC's Government House was Dawn Welsh.
* Catholic Charities selected Gayle V. Economos director of communications.
* Historic Inns of Annapolis named Tina Lutzi manager of the Treaty of Paris Restaurant.
* Classic Catering People has chosen Jeff Karlin as coordinator of operations.
* ExecuStay Inc. announced the following additions to its staff: Rachael Carter, office manager; Christine Miranda, corporate housing consultant and Marla Cohen, marketing assistant.
* ESSROC Materials named Alan P. Ombrello plant manager of its Frederick cement manufacturing facility.
Advertising and PR
* Eisner & Associates announced that Alyson Hallberg joined the Baltimore agency as art director.
* Hanlon & Partners appointed Joe Gorman production supervisor.
* Hartt & Co. named Amanda L. Katz a public relations account executive.
Professional
* Stegman & Co. appointed Wayne William Spencer client development officer and Garrett G. Parks a senior accountant assigned to the Towson offices.
* C. W. Amos & Co. named Margaret Ann Hunter a senior consultant and David J. Lambdin manager. Both are assigned to the management advisory services division.
* Communications & Systems Specialists, based in Columbia, has chosen John Gilbert vice president of engineering.
Legal and insurance
* HMS Insurance Associates announced that Thomas A. Welsch has joined the staff as a senior account executive.
* Morgan Financial Group has added Craig R. Nusinov to its financial staff.
Health care
* Northwest Hospital Center, located in Randallstown, selected Connie Gibbons nurse manager and Kathleen Buck assistant nurse manager, critical care services.