Team Bios

Meet the leaders

It is our people that make the difference. Call One’s executive leadership team brings deep experience in diverse disciplines.

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Founder and

Chairman of the Board

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President and

Chief Financial Officer

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President of Call One Services

and Chief Revenue Officer

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Mark Malosh

Chief Operating Officer

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Chief Customer
Experience Officer

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General Manager of

Call One Carrier Services

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Vice President of
Finance

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Vice President of
Customer Solutions

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Vice President of
Channel Sales

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Margie Greenbaum

Director of Carrier Relations

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Anna Klemm

Director of Margin Improvement

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Michael McDaniel

Director of Service Delivery

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Director of Core
Network Engineering

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Alex Sondgerath

Director of Account Management

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Kristin Syoen, PHR

Director of Human Resources