Nestor Traffic Systems Inc. of Providence, R.I., has appointed Zev Fogel and Robert Kerr to the company's executive management team. Fogel is vice president of business development and Kerr is vice president of administration. They will work at the company's Southern California office.

Michael J. Sheehan is the vice president of federal sales for ECCS Inc. of Tinton Falls, N.J., and will head the company's Falls Church, Va., offices.

TRW Inc. of Reston, Va., has named Christopher B. Welker vice president of marketing and business development for TRW Global Enterprise Solutions.

At PlanGraphics of Frankfort, Ky., Michael L. Bober is a systems analyst and Edward Williams is a geospatial analyst.

Tom Quinly is vice president of business systems and chief financial officer at DY 4 Systems Inc. of Kanata, Ontario. He will also keep his position of general manager at the company's wholly owned subsidiary, Ixthos Inc. in Leesburg, Va.

Grant Thornton of Washington has announced that Chris Mattingly has been appointed practice leader of and will manage the company's government contracts business services practice.

Robert W. Riland III has joined DISC Inc. of Milpitas, Calif., as the company's vice president of marketing and business development.

Vasco Data Security International Inc. of Oakbrook Terrace, Ill., has appointed vice president Dennis D. Wilson chief financial officer.

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