EXECS ON THE MOVE: Plastic tray supplier Associated Packaging Technologies, Chadds Ford, Pa., announced three hirings. They include Richard Schwarz, named director of R&D; Jeffery Lucash appointed national sales manager, Food Service and Distribution; and Ron Skotleski, named as a marketing analyst. . . .  Multisorb Technologies, a Buffalo, N.Y., supplier of oxygen absorption media in packaging, hired Jeff Brown as Food & Beverage market business development leader. . . . Norwood Marking Systems / Allen Coding Systems, Downers Grove, Ill., said it hired Randy Roberts as regional account manager, to serve several Southern states from Florida to Texas.