Ronald F. Foerster has been named president of AT&E Laboratories Inc., a subsidiary of AT&E Corp. of San Francisco. Foerster has held senior technical and managerial positions with several technology companies, including Northern Telecom Inc. and CXC Corp. Robert S. Martin has been appointed vice president and controller. Martin previously was chief financial officer of TXL Corp., a leasing and finance company. Stephen C. Jones, formerly AT&E's chief financial officer, has been named president of AT&E's Receptor North America Inc. subsidiary. Jones will also continue to serve as a vice president and director of AT&E.