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About Us

TSG helps enterprises modernize with intent by aligning technology initiatives to business outcomes and turning investment into sustained operational performance. We work alongside you to improve how work gets done, decisions are made, and value is delivered so progress holds long after implementation.

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Trusted leader in modernization for over two decades

Since 1999, TSG has partnered with organizations navigating constant change. As technologies evolve, risks shift, and priorities reset, we help leaders ensure their investments translate into real improvements in how work gets done, decisions are made, and value is delivered.

Our approach is grounded in people as much as platforms. We work side by side with client teams to modernize systems, strengthen capabilities, and build the confidence needed to operate in new ways. Rather than handing off strategy to execution, we stay engaged from idea through adoption so progress happens while change is underway. 

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How we show up for you

The way we work is as important as what we deliver, grounded in trust, ownership, and the determination to see complex challenges through to real results.

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Trust
 
We earn your trust through consistency, transparency, and follow-through. It is the foundation of every partnership we build.  
 
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Service
 

We take ownership of your outcomes, not just your deliverables. Your priorities become our priorities.  

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Grit
 
We stay focused when things get hard. Grit is how we turn complexity into progress and challenges into results.  

Meet our senior leaders

Our team is made up by innovative thinkers, trusted leaders, and collaborators who push the edge of what’s possible.

Eric Castorina
Eric Castorina

Sr. Director, Learning Performance + Optimization

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Whitney Dannecker
Whitney Dannecker

VP, Technology

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Becca Denslow

Sr. Director, Service Delivery

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Byron Dunn
Byron Dunn

Vice President of Delivery

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Zach Earls
Zach Earls

Chief Revenue Officer

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Fletcher Emery
Fletcher Emery

Sr. Vice President, Client Development

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Ben Hampshire
Ben Hampshire

Sr. Director, Solution Development

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John Hamrick
John Hamrick

Vice President, Financial Services

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George Karakostantis
George Karakostantis

President Chief Executive Officer

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Mari Orr
Mari Orr

Controller

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Tony Perry
Tony Perry

Chief Financial Officer

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Dustin Sandoval
Dustin Sandoval

Vice President, Consumer + Industrials

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Abby Shackelford
Abby Shackelford

Vice President, General Counsel

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Pete Spangenthal
Pete Spangenthal

Vice President, Healthcare + Communications

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Brezny Weening
Brezny Weening

Vice President, People

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Tom Whitely
Tom Whiteley

Chief Operating Officer

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Kristen-van-Wijngaarden-500x500
Kristen van Wijngaarden

Vice President, TSG Federal 

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Ross Witte
Ross Witte

Vice President, Energy + Utilities

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Sheldon Wolitski
Sheldon Wolitski

Founder, Chairman of the Board

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