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Rick Mace

Rick Mace serves as TPx’s CEO where he’s responsible for the company’s overall strategic direction and priorities. Mr. Mace has led several companies as CEO and brings deep technology and transformation experience to TPx. An executive partner with Siris Capital since 2011, he developed a passion for accelerating change while leading mid-size, growth stage private companies.

With more than 30 years of experience spanning a wide range of technology and telecommunications companies, Rick has held executive leadership positions at Bell Atlantic Corp (now Verizon), PacketExchange, Tekelec Corporation, Steleus Corp and PakNetx Corp.

Rick is a member of the Board of Directors of Digital River. He was previously a board member at TNS, Tekelec, Steleus Corp, Wireless Telecom, Kentrox Corporation and PacketExchange. Rick earned his bachelor’s degree from The Wharton School of the University of Pennsylvania.

Don Joos joined TPx as CEO in 2020 following the company’s acquisition by Siris Capital LLC. In this role, he leads the company’s continued strategic evolution, capitalizing on its successful transformation into the premier managed services provider. Joos brings more than 20 years of experience in the technology industry with a strong track record of transforming high-tech companies in the software as a service (SaaS) and unified communications as a service (UCaaS) space.

Most recently, Joos was the CEO of PGI, a cloud-based communications and collaboration provider and Siris Capital portfolio company. Previously, he served as President and CEO of ShoreTel from 2013 until its sale in 2017. In that capacity, he drove the strategic transformation of the business to a subscription-based SaaS model. While at ShoreTel, he also served as Senior Vice President of Business Operations and Vice President of Global Services. Prior to that, Joos held executive roles at Avaya, including Vice President of Global Services, Vice President of Global Implementations and Vice President of Global Customer Care. Earlier in his career, he was Vice President of Services and Strategic Customers at SiteStuff. Joos earned a Bachelor of Science degree from Springfield College in Massachusetts.