C1 is transforming the industry by creating connected experiences that make a lasting impact on customers, our teams and our communities. More than 10,000 customers use C1 every day to help them build meaningful connections through innovative and secure experiences. Our NPS of 80, placing us in the World Class category for the fourth consecutive year, is a testament to our ability to provide customers with the highest level of customer satisfaction, responsiveness, and deep domain expertise. C1 collaborates with most of the Fortune 100 companies along with other key global industry partners to deliver solutions with a total lifecycle approach. C1 holds more than 5,600 technical certifications across thousands of engineers throughout North America, including three Customer Success Centers.

Enterprise Software

Telecommunications

Technology

IT Services

C1's headquarters in Bloomington, MN, United States

Jeffrey Russell

D. Robert Martin

Candace Holt

Pete McGuinness

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Joseph H. Bleichert Jr.

Julie Wilson

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Mark Langanki

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