Chief Executive Officer

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Our founder and CEO, Walt was a career Navy Master Bomb Technician and deep sea diver supporting US Special Operations globally. He also provided operational support to the FBI’s Hostage Rescue Team and related countering weapons of mass destruction missions throughout the US government as well as her Allies. In founding Tier Tech International, Inc. (TTI), Walt’s vision to bring agile thinking and a ‘no-fail’ attitude to private- and public-sector clients with daunting challenges has been realized through persistence, hard work, and focusing on the core capabilities where TTI excels.

When not running TTI, Walt can be found traveling the world with his family or undertaking offshore activities in the open ocean off the magnificent Gold Coast of south Florida.


Executive Vice President

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Our Executive Vice President, Mike brings the seasoned perspective of a Navy Bomb Technician whose career spanned more than 30 years and a diverse spectrum of must-succeed missions including Combatting WMD, underwater Mine Countermeasures, Advanced Weapons Research and Development, Special Operations and Humanitarian Assistance.

He is a recognized thought leader and renowned problem solver and is the architect of most of our SDA tools. Mike is an ultramarathon cyclist and backcountry skier, as both give him plenty of time to think.


Director of Operations

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Katie Sandow, our Director of Operations, has been with TTI since 2018. She is an Old Dominion University graduate. Previously she was licensed agent for the Virginia Dept of Criminal Justice services for 15 years.

When she is not working Katie enjoys working out, gardening, and spending time with family and friends.


Director of Business Development

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With over 20 years of national security experience in the government and private sector, Mary-Gardner Coppola has a proven track record of delivering innovative solutions to complex challenges. 

Prior to TTI, Mary-Gardner served as a U.S. Diplomat and specialized in the geopolitics of the Indo-Pacific region. She later spent four years as a strategic advisor to the U.S. Marine Corps, including an appointment to the Commandant’s senior staff to implement a generational shift in the design and delivery of the future force. In the private sector, Mary-Gardner helped to launch a strategic risk advisory firm that managed exposure to complex markets, with a particular focus on China.

 Mary-Gardner is an avid runner, accidental gardener, and enthusiastic fan of her three kids’ many sports teams.

Justin losh

Director of Information Technology

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Justin Losh, our Director of Information Technology, has been with us since 2016. By day, he is wrangling servers, and saving the future by preventing disasters at night.

In his free time, he enjoys attending concerts, smoking meats, and spending time with friends and family.

John Kerr

Senior SDA Lead

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John Kerr joined the TTI team in 2020 as a Senior Advisor to the Strategic Design Approaches (SDA) program. John brings deep experience in developing tailored and collaborative approaches to complex problem solving for a variety of national security customers. His professional background spans multiple sectors of government and commercial industries to include the military, the pharmaceutical industry, and consulting services.

Interested in joining the TTI team?

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