Leading With Purpose Text

John McKenna

Chairman +
Chief Executive Officer

John has led ConvergeOne since 2008 through a number of acquisitions and substantial growth. Previously, he served 8 years as CEO of Siemens IT Solutions and Services, CEO of ENTEX Information Services and Sr. EVP at JWP Inc. He got his start at IBM, where he rose to oversee one of the largest branch operations in New York City.


Tamara Shaw

Vice President,
Transformation + Integration

Tamara has more than 25 years of industry experience successfully leading teams in business, operational, financial and productivity improvement and organizational change. She joined ConvergeOne from Atos International where she was the Vice President, North America Service Operations.   Tamara holds a BBA degree from University of Houston, C.T. Bauer College of Business and an MBA from Texas A&M University – Commerce and has been both PMP and Six Sigma Green Belt certified.

D. Martin

Field Organization

D. has more than 20 years of leadership experience in the technology industry. He joined ConvergeOne in 2020 and previously held executive roles at Red Hat, VCE and Cisco. Martin holds bachelor’s degrees in economics and political science from Queens College and is a member of Business Executives for National Security.


Services Organization

Omar Bhatti has more than 15 years of leadership experience in the professional services industry. He joined ConvergeOne in 2022 and previously held executive roles at GDIT, CSC, and Accenture. Omar holds a bachelor’s degree in finance from George Mason University, actively supports community STEM initiatives, and has a history of growing public-private partnerships that create resilient talent ecosystems across a full range of next-generation IT services.

Colleen Haberman

Vice President,
Human Resources

Colleen brings more than 25 years of experience in human resources to her role. She previously held executive roles at Univita Health Inc., BioScrip, Express Scripts and Prudential Home Mortgage (now Wells Fargo Home Mortgage). Colleen holds a bachelor of arts degree from the University of Minnesota.

Mark Langanki

Chief Technology Officer

As CTO, Mark spearheads our innovations in technology solutions and services. He spent 25 years as the Chief Operating Officer at Spanlink Communications, which we brought on board in 2014. A graduate of the University of Minnesota, Mark has been an instructor there since 1996 and in 2014 assumed the role of Associate Program Director.

Jeff Nachbor

Chief Financial Officer

Jeffrey manages all aspects of our financial planning, assessment and reporting. He previously served at Leap Wireless and at H&R Block. A certified public accountant, Jeffery holds a bachelor’s in accounting from Old Dominion and an MBA from the University of Kansas.

Paul Maier

Executive Advisor

  • Paul is a senior executive with 30+ years of experience in the IT and telecommunications industry and extensive product management and business development knowledge. Paul previously held the role of Managing Director, Services Organization, and is now serving as Executive Advisor. His expertise in deploying managed and cloud-enabled services and emerging technology solutions and his passion for customer satisfaction and motivating teams help ConvergeOne deliver exceptional solutions, value, and experience to our customers.


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