The Team

Todd Vikan


Todd Vikan is the President for TACG. He joined the company in January 2009. Mr. Vikan is responsible for establishing operating policies and guidance for the company. Mr. Vikan also works closely with TACG directors and project leads to ensure timely and accurate engagement execution. Todd Vikan earned his Bachelor of Science in Biology from the University of South Carolina in Columbia, South Carolina, and his Masters of Systems Management from the Air Force Institute of Technology at Wright-Patterson Air Force Base in Ohio.

Erika O Hora

Chief of Staff

Erika O Hora is the Chief of Staff for TACG and is responsible for growing and maintaining TACG’s extensive portfolio of partner companies. She joined the company in January 2013 after serving as Scheduler for United States Congressman Steve Austria. During her tenure on Capitol Hill, Erika was responsible for managing relationships between her boss and other members of Congress, committee members, and various high level political and military figures. Ms. Luth earned her Bachelor of Arts in Political Science from Miami University in Oxford, Ohio.

Erin O’Brien Chamish

Mrs. O’Brien Chamish joined the company in April 2012 after serving as an Interoperability Support Engineer for Copper River IT, a Certified Tribal 8(a) firm. Prior to her tenure at Copper River, Mrs. Chamish provided consulting services for the Naval Research Laboratory’s custom-built Oracle financial management system. Mrs. Chamish earned her Bachelor of Arts in English and a minor in History from Washington College in Chestertown, Maryland.

Joel Schell

Mr. Schell joined the company in February 2009. With over 15 years of professional experience in supply chain and logistics, as well as business operations and program management, Mr. Schell’s career has included leadership positions across multiple sectors and diverse assignments. Additionally, Mr. Schell served in various logistics assignments as a decorated Active Duty Army Logistics Officer Army officer after graduation from the United States Military Academy – West Point.

JD DuVall

Mr. DuVall joined the company in December 2019. He served as an Air Force Logistics Readiness Officer and Cyberspace Officer in various assignments before retiring after 20 years of service in 2013. He has held positions of increased responsibilities in the Aerospace and Defense market from subcontract manager, program manager, defense management consultant, and manager of Business Development and Customer Outreach. Mr. DuVall holds a Bachelors of Science in General Sciences from West Virginia University Institute of Technology, College of Engineering and Sciences, a Master of Arts in Management Information Systems, a Master of Business Administration from Webster University, St Louis, Missouri, and a Master of Arts in National Security and Strategic Studies from the Naval War College, Newport, Rhode Island. Since 2010, Mr. DuVall has served as the Chief Operating Officer, Logistics Officer Association, a 501c3 non-profit, that is focused on the professional development of military and civilian Logistics professionals.

Jon Selvaraj

Mr. Selvaraj joined the company in September 2010. He has over 20 years of experience in providing results-oriented Information Technology and business solutions in the government sector. His expertise includes Program/Project Management, Requirements Analysis, Enterprise Architecture, Master Data Management, Business Process Re-engineering, System Integration, Enterprise Resource Planning (ERP), IT Portfolio Management, and Statutory / Regulatory Compliance. Mr. Selvaraj earned his Bachelor of Art in Psychology from West Virginia University, with a Master of Science in Industrial and Organizational Psychology from Wright State University.

Keith Harvey

Mr. Harvey joined the company in June 2010. Mr. Harvey has over 30 years of experience providing Information Technology (IT) solutions and services for customers in both the government and commercial sectors of the market. His experience spans the entire Program Management Lifecycle (PMLC) and Software Development Lifecycle (SDLC) phases supporting numerous IT programs and projects. Keith earned his Bachelor of Science in Computer Science from Wright State University, Dayton, Ohio.

Kevin Sampels

Mr. Sampels joined the TACG team in December 2019. Mr. Sampels is responsible for developing and executing the corporate strategy to grow the TACG Logistics and Sustainment portfolio in the Department of Defense and across the entire Federal market. He is a highly experienced logistician bringing over 35 years of expertise in logistics operations including: systems acquisition, requirements planning, supply chain design, storage operations, global distribution, organizational, intermediate and depot level maintenance, and material disposition. He is certified by the Department of Defense in both Lifecyle Logistics and Program Management. Mr. Sampels is a retired Air Force Colonel, successfully delivering logistics support services to the Air Force and Joint Warfighters around the world. He has served at all levels in the Air Force, commanded multiple organizations, and deployed in support of numerous operations and exercises around the world. He is currently serving on the boards of the Logistics Officer Association, the National Defense Industrial Association Logistics Division, and the Defense Logistics Agency Foundation.

Ramona Vikan

Mrs. Vikan joined the company in October 2007. Ms. Vikan was a graduate of the 2014 Leadership Dayton program and was a 2014 Forty Under 40 honoree. Ms. Vikan’s career includes managing and delivering work in the Department of Defense and Health and Human Services. Ms. Vikan’s experience includes project management, acquisition support, financial management, risk management, technical and process analysis, business operations, and maintenance and sustainment.

Russell Koch

Director of Human Resources
Mr. Koch joined the company in June 2015 as an HR Specialist/Recruiter. He has over 10 years of experience in the federal sector having previously worked as a Staffing Consultant and as a contractor at the U.S. Army Research Laboratory. Mr. Koch is a certified SHRM-CP Human Resources professional and is a licensed Everything DiSC facilitator. He received his Bachelor of Science in History from Towson University.

Steve Green

Director, Strategic Operations
Steve Green is the Director of Strategic Operations for TACG and is
responsible for providing strategic leadership long-range and short-term
planning for the areas of reporting, data analysis, system and technology
enhancements. He drives the operational cadence of the various businesses
and drives the definition, measurement, and tracking of the key strategic and
operational initiatives along with the company’s certified ISO 9001:2015
Quality Management System. He joined the company in August 2015 after 29
years with the Air Force where he most recently served as the Course
Director and Lead Instructor for the Air Force’s Lean Six Sigma Blackbelt
course. Steve has held various logistics positions within the Air Force and
brings over 25 years of process improvement experience to TACG.