Middlesex Sciences, of Foxborough, Mass., has named Thomas J.Facklam vice president of research and development.Pharmagenesis Inc., of Palo Alto, Calif., has named Robert Tidwellvice president and general manager of the Pharmagenesis U.S.operation.Ribogene Inc., of Hayward, Calif., has appointed Thomas Preston vicepresident, business development; Vincent Miles vice president,research; and Susan Simmons, director of finance and controller.Oncogene Science Inc., of Uniondale, N.Y., has named Ann Rosecorporate vice president.

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