GTCR Forms Gov’t Defense/Security Platform

GRCR has formed Six3 Systems Inc., a Fairfax, Va.-based government services acquisition platform focused on national security and defense intelligence. No financial terms were disclosed. Six3 Systems will be led by Robert Coleman, former CEO of government contractor ManTech International (NYSE: MANT).


GTCR, one of the nation’s leading private equity firms, today announced it has entered into a partnership with Robert Coleman to form Six3 Systems, Inc. (“Six3 Systems”). The new company, headquartered in Fairfax, Virginia, will focus on building a leading government services platform specializing in national security and defense intelligence. Mr. Coleman will serve as Chief Executive Officer of Six3 Systems.

Robert Coleman is the former President and Chief Operating Officer of ManTech International (NYSE: MANT), a federal contractor strategically focused on national security programs. During his tenure as President and COO of ManTech, Mr. Coleman helped reposition the company as a provider of high-end, mission-critical solutions through a series of targeted acquisitions and significant organic growth, increasing revenues from $827 million to over $1.8 billion during this period. Prior to joining ManTech, Mr. Coleman founded and served as the President and CEO of Integrated Data Systems, a leading provider of technology and cybersecurity solutions and services, from 1990 through 2003.

“I look forward to building a business strategically focused on solving some of our nation’s toughest national security challenges,” stated Coleman. “The current political and technological environment offers a unique set of challenges and opportunities. GTCR has a history of building successful companies in the government services space through both organic growth and strategic acquisitions. We believe this is an attractive time to build a presence in our targeted markets.”

“We are thrilled to be partnering with Bob,” said GTCR Principal Craig Bondy. “We view Bob as the leading executive in the national security space given his extensive experience and industry relationships. His track record coupled with attractive dynamics in the intelligence and cybersecurity sectors make this an exciting investment opportunity. This is another great example of GTCR’s strategy of partnering with proven management teams to build companies in attractive industries.”

“As the government continues to fight evolving asymmetric threats both domestically and abroad, specialized providers of intelligence and cybersecurity solutions will play a critical role in protecting the nation,” added Lawrence Fey, a Vice President at GTCR. “We look forward to working with Bob to build a business on the leading edge of these industries.”

GTCR’s investment in Six3 Systems will be made from GTCR Fund IX LP, a private equity fund with $2.75 billion of committed capital.

About Six3 Systems

Six3 Systems, headquartered in Fairfax, Virginia, is a company focused on acquiring government services providers with a focus on national security. For more information about Six3 Systems email

About GTCR

Founded in 1980, GTCR Golder Rauner, LLC is a private equity investment firm and long-term strategic partner for outstanding management teams. The Chicago-based firm pioneered the investment strategy of identifying and partnering with exceptional executives to acquire and build companies through a combination of acquisitions and strong internal growth. GTCR currently manages more than $8 billion of equity capital invested in a wide range of companies and industries. More information about GTCR can be found at