Job Details. Job#: 2020936. Job Description. Apex Systems is looking for a Vendor Performance Manager for a client in the Kansas City area. The position would be a contract to hire and the expectation is that the candidate would come onsite 3 days a week to their Overland Park, Kansas location. Requirements. 7-10 years: Telecommunications/Wireless Industry - experience in the areas of Engineering, Finance or Carrier Management desired or equivale...