David J. Denham Hired To Lead HR Initiatives For Tri-State Petroleum Corp. October 17, 2010 No Comments on David J. Denham Hired To Lead HR Initiatives For Tri-State Petroleum Corp. Post View 1 The Tri-State Petroleum Corporation has hired David J. Denham to head HR projects for the more than 200 employees. Tri-State Petroleum is a family-owned business…