GGS - Key Persons


Dennis Dolin

Job Titles:
  • Director of IT Delivery
Dennis brings more than 25 years of experience in IT projects delivery. Responsible for sales engineering, deployment, and contractor relationships, his passion is to develop and deliver technology-driven business services and solutions without sacrificing outstanding customer service. Prior to joining the team, Dennis was the CEO of two successful telecommunications contracting companies, Quinn Communications and Northeast Telecom. He has extensive experience with successful deployment of nationwide projects, including the delivery of industrial and enterprise fiber, copper and wireless networks, and telecommunications and data network hardware and software deployment. Dennis has delivered successful IT rollouts, for large customers including United States Department of Veterans Affairs, the Federal Emergency Management Agency, the Federal Bureau of Investigation, Dupont Chemical Corporation, and Clearon Corporation.

Nathan Johnson - COO, CTO, VP

Job Titles:
  • COO
  • CTO
  • Vice President
Nathan has over 20 years of information technology and operational experience. He worked several years in the National Weather Service and Department of Defense before shifting to the commercial arena. During his career he's worn multiple hats both in the government as well as in large companies such as Owens Corning during the bankruptcy exit and EnerVest Oil & Gas through massive growth/reduction. He's been involved in all levels of software development, hardware lifecycle support, hardware/software implementations, project management, and operational management. Nathan holds Bachelor of Science degrees from West Virginia University Institute of Technology in Computer Science, Electrical/Computer Engineering with a Mathematics minor.

Nina Shell

Job Titles:
  • Director of Growth and Business Development
Nina has 17 years of experience leading growth in the IT service industry, an education in leadership and technology management, and project management certification. She has a passion for understanding the needs of the customer, linking mission objectives with technology initiatives, and maintaining long term relationships built on trust. Most recently, Nina directed the sales department for a value-added reseller and managed service provider growing team-generated revenue 180% over four years, increasing customer retention and developing into new geographic regions. She understands the importance of scaling the business manageably, structuring process to ensure repeatability and consistency, including examples such as employee performance evaluation, lead intake, opportunity discovery, account planning, project management initiation and closure. In 2019, Nina was awarded The State Journal's Generation Next (40 under 40), attesting to her early successes in business and community development efforts.

Scotty Johnson - CEO, President

Job Titles:
  • CEO
  • President
Scotty has more than 20 years of information technology and information security experience. He served in the United States Navy from 1992 to 1998 as a Cryptologic Technician. Following his time in service he served in multiple leadership positions within the Department of Veterans Affairs and as the Deputy Chief Information Security Officer for the state of South Carolina. Scotty holds a Bachelor of Science degree from Mountain State University.

Sean Cooper

Job Titles:
  • Director of IT Projects
Sean comes to Greenbrier with over 20 years of Operational and Project management experience in the Energy and Communications sectors, with a customer-centric focus towards meaningfully moving teams and technology forward. This has been demonstrated through the oversight of international deployments while with Schlumberger, to Energy Trading platforms development and support with Sequent Energy Management, to most recent opportunities as the Vice President of IT at EnerVest Oil and Gas. Throughout his career, he has held a variety of engineering, governance, financial, and mentoring roles - all with an eye to leveraging the strengths of teams and technology on behalf of the business.