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Donn Greiner is a partner at Altaworx, LLC since 2011, where Donn focuses on providing SIP services and Hosted VoIP services. Donn is also an independent telecommunications consultant at Greiner Group, LLC, and a real estate and start-up investor. With a background in telecommunications that spans from Southwestern Bell Telephone to USAA, Donn has a wealth of experience in the industry. Donn holds a BA from The University of Texas at San Antonio and an MBA from the University of the Incarnate Word with an emphasis in Telecommunications Management.