About Us

Open System Technologies Corporation believes in the power of experience and expertise. That is why we are certified in a broad spectrum of capabilities to better serve our diverse clientele with flawless execution and exceptional client relationships.

At OST, we are proud to have assembled an experienced team of driven professionals who strive to keep us meeting new heights of performance. We encourage you to read about our visionary management team below.

Diana E. Truitt, Managing Partner

DianaFrom day one, Mrs. Truitt has been involved with the development and growth of the company. As Treasurer and Chief Financial Officer, she helped secure, staff, and manage the first home office in Frederick, Maryland. She was instrumental in relocating our corporate office to Virginia in February 1998, and securing the necessary financial capital to operate the fiscal activities of the company. She was promoted to President in February 1999 and held that position to December 2004. She currently holds a bachelor of Arts in Education from the University of Maryland and resides in Gainesville, Virginia.

Thomas R. Truitt, Managing Partner

Tom_PianoMr. Truitt founded the company in July 1996 and served as the company’s first President. In December 2004, he once again assumed the responsibilities as President. He was instrumental in evaluating, recommending, and procuring the products necessary to build the corporate technology infrastructure. He has over 25 years of Information Technology experience and has worked in many technical management capacities for the following companies and government institutions: Citibank, Freddie Mac, Fannie Mae, T. Rowe Price, IBM, MBNA America, Lockheed Martin, LORAL, Westinghouse, Northrup Grumman, SAIC, General Dynamics, NASA, Air Force, Federal Aviation Administration, Federal Bureau of Investigation and Health Care Financing Administration. He currently holds a Bachelor of Science in Electrical Engineering from Virginia Tech and resides in Gainesville, Virginia. He has completed graduate studies in the area of Digital Signal Processing at Johns Hopkins University.

Our affiliations and certifications include:

  • Certified Information Systems Security Professional (CISSP)
  • Certified Information Security Manager(CISM)
  • CompTIA Advanced Security Practitioner (CASP)
  • Security+ CE
  • Certified Ethical Hacker (CEH)
  • CA Certified Professional
  • Oracle Certified Professional (OCP)
  • Oracle Database Administrator 11G/12c Certification
  • Oracle Java Certification
  • Red Hat Certified Architect
  • IBM Security Identity Manager Certification
  • IBM Security Access Manager Certification
  • Tivoli Certification

Primary NAICS Codes: 541330, 541511, 541519, 541611, 541618, 541690, 541990
CAGE Code: 3W9B7
DUNS # 96-669-5348
Organization: ā€œCā€ Corp.

Contact Us

Do you want to learn more about the OST team? Contact us via our web form or call us directly at 301-305-7790.


Our mission is to provide technological solutions superior in quality and performance to our clientele. We strive at all points to make our services accessible, affordable and intelligible, regardless of complexity. We aim to make our clients successful on all levels through innovative practices and transformative results.


Our Services

  • Cloud Computing
  • Cybersecurity
  • Data Center Monitoring
  • Application Performance Monitoring
  • Expert Programming

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