Houston-based Parker Drilling Co., a global drilling contractor and service provider, has appointed Philip Schlom as chief accounting officer and corporate controller, and Jon-Al Duplantier as vice president and general counsel.

Schlom most recently worked for Shared Technologies, where he served as vice president and corporate controller. He will join Parker on Sept. 8, and report to chief financial officer W. Kirk Brassfield.

Duplantier joins Parker from ConocoPhillips, where he served in several legal and executive roles from 1995 until this year. He will join the company Sept. 14, and report to Chairman and CEO Robert Parker.