Technical Excellence With Heart

We are a family with a common purpose: to glorify God in all that we do, to display technical excellence in our work, to support our war fighters, and to sustain a creative, supportive, constructive work place for our employees.

Our People

SimVentions is a company of individuals built on a strong culture of talented, engaged employees focused on delivering high quality solutions to our customers while maintaining a positive environment. That is why we built SimVentions from the ground up with people, family, and the community in mind.

Founded in 2000 by four experienced leaders in technical support of the U.S. military, today SimVentions is headquartered just south of Washington D.C. in Fredericksburg, VA.  Our company continues to be focused on technical excellence and customer and employee satisfaction.  We are consistently thinking, working and succeeding together.  Because of this SimVentions is a thriving small business supporting the Navy, Marine Corps, Army, other joint Department of Defense (DoD) agencies, non-profits and commercial businesses.

We exist to help you succeed. We work hard to understand the challenges you are facing and provide innovative solutions that go beyond the expected.  Our dedicated service teams are here to help you with your most pressing needs and reaching your long term objectives.

We’re here for you — today and tomorrow. Learn about our values or contact us today to find out more.

Meet The Team

SimVentions has a full and seasoned leadership team. Highly experienced in their respective fields, they pride themselves in the work they do and the people they lead.

Larry Root, CEO

Executes the mission, vision, and values of SimVentions and implements the direction of the Board of Directors.

George Hughes, President

Provides direction, support, and guidance for the SimVentions executive leadership team.

Joe Caliri, COO

Oversees the day to day operations of SimVentions utilizing over 28 years of management experience.

Bob Duffy, BD

Coordinates all Business Development efforts and sets the goals for the company’s strategic plan.

Paul Gustavson, CTO

Oversees development and integration of technological capabilities and processes.

Steve Goss, CFO

Ensures financial support to the US Government and compliance with IRS and DCAA regulations.

Herb Kaler, Sr. VP

Oversees Strategic Initiatives for SimVentions using his extensive Navy and DOD Contractor experience.

Mary Beth Roberts, HR/Security

Responsible for planning, development, organization, and implementation of the company's human resource function.

Paul Gatanis, CIO

Oversees equipment upgrades, supervises IT team members, and presides over IT-related projects.

Matt Wilson, Vice President

Oversees the development of tools and technologies for the company and leads the Technology Solutions Group.

Buddy Chandler, Chief Engineer

Provides management and technical direction in the field of systems engineering practices.

Robert Fidler, Vice President

Provides leadership and management for the Electronic Warfare and Combat Systems Group.

Troy Sizemore, Contracts Administrator

Responsible for leading and managing the SimVentions contracts and purchasing department.

Jason Doering, Vice President

Provides leadership, management, and engineering support for the Asymmetric Warfare Group.

Megan Shepherd, Vice President

Oversees the Cybersecurity Engineering team while also assisting with direction of company operations.

Jake Johnson, Vice President

Supports all SimVentions work in the Marine Corps market as VP of the Marine Corps Group.

Jennifer Conway, Controller

Responsible for day-to-day management of all finance functions within the company.

SimVentions. Built for Your Success.


Your Success is Our Honor.  These five simple words express our culture: to deliver solutions that go beyond the expected. Centered around customer and employee satisfaction we believe it can only be accomplished by understanding our customers’ needs, providing innovative solutions and doing what it takes to ensure your success.



Our culture helps foster imagination, creativity, exploration, and discovery. This has helped us build a dedicated team with passionate hearts and unmatched capabilities, as evidenced by referrals from existing customers, positive employee feedback, and numerous awards including being one of Virginia’s best places to work.



SimVentions is not only committed to excellence in our work, but to serving the surrounding community as well. We believe is it an honor and a responsibility to use our time and talents to serve in both the business and public sector, which we do through local fund-raising events, as well as international missions and service projects.



SimVentions’ leadership team is comprised of a core group of experienced professionals who know how to effectively communicate, connect with, and lead others. We leverage our experience to enable innovation and foster a corporate culture which yields positive change by bringing ideas and concepts to life.


Be a part of something greater.

Explore Careers with SimVentions