Dr. Daren Timmons, Chair

Dr. Daren Timmons is University of South Carolina- Aiken’s Provost & Executive Vice Chancellor of Academic Affairs. Timmons previously served as Dean of the College of Sciences & Engineering at USC-Aiken.

Before coming to USCA, Timmons was the John C. Allen ’62 Institute Professor of Chemistry and head of the Chemistry Department at Virginia Military Institute in Lexington VA. He received his bachelor of science degree in chemistry from Duke University in Durham NC and his doctorate in chemistry from Texas A&M University in College Station TX. 

Steve Sheetz, Vice-Chair

Stephen O. Sheetz is a mechanical engineer from Georgia Tech with over 35 years of experience in the nuclear industry. He was actively involved during the construction and early test operations of the Defense Waste Processing Facility and has supported the Savannah River National laboratory by marketing technologies to the Department of Defense. Steve also supported a multi-lab program called the Advanced Fuel Cycle Initiative/Global Nuclear Energy Partnership.

He retired from SRNL in 2015 and is now providing consulting services on tritium and pit programs for SRNL.  He has also been providing strategic planning support to domestic advanced nuclear reactor teams. 

Steve was a founding member of CNTA and has served on the Board of Directors and chaired the speaker’s bureau. 

Dr. James Marra, Executive Director

Dr. James C. Marra is a veteran in the nuclear industry. He began his nuclear career at the Savannah River National Laboratory (SRNL) as a Senior Engineer and progressed to the level of Advisory Engineer. He also spent time as a Senior Scientist for the U.S. Department of Energy’s Office of Environmental Management (DOE-EM).

Marra has a Bachelor of Science degree in Ceramic Science and Bachelor of Arts degree in Mathematics (Alfred University, Alfred, NY); a Master’s degree in Materials Engineering (Worcester Polytechnic Institute, Worcester, MA); and a Ph.D. in Ceramic and Materials Engineering (Clemson University). 

Charlie Hansen, Treasurer

Charlie Hansen is a retired contractor and federal senior executive who served for 46 years in the Naval Nuclear Propulsion Program, commercial nuclear power generation, and in US Department of Energy (DOE) waste management programs. Most recently he was a Vice President of Parsons Corporation, from 2005-2013, where he was responsible for business development, and project controls and risk management for construction of the Savannah River Site Salt Waste Processing Facility Project (SWPF)

Hansen earned a BS in chemical engineering from Tufts University in 1967. Charlie and his wife, Lyddie, have resided in Aiken since 1998 and are active in their community; they are both avid ballroom dancers. 

Board Members

Dr. Jeff Allender

Jeffrey S. Allender is Advisory Scientist and Program Manager at Savannah River National Laboratory (SRNL). He first joined in 1978 and has since been researching radioactive waste disposal, evaluating geologic repositories for long-term disposal, developing technologies for reactor fuel fabrication and recycling, and materials management. 

He earned a B.S. in Physics from Davidson College and Ph.D. from Cornell. 

Roger Burnett

Roger R Burnett is a Chief Project Controls Specialist at Parsons.  Currently he oversees a broad portfolio of environmentally-based contracts nationally and internationally for Parsons. He moved to Aiken, SC in 2010 to support Parsons’ efforts on the Salt Waste Processing Facility at the Savannah River Site. 

He was born and raised outside of Boulder, CO and is a graduate of the University of Colorado. He holds a BS in Business Administration with dual-emphasis in Accounting and Finance.


Byron Bush

Byron N. Bush is currently working as the Director of Business Development for Empowered Global Solutions, Inc. (EGS, Inc.).  Byron is currently responsible for federal, state, and commercial development for staffing and recruiting, innovative solutions, and public relations.. Before becoming Director of Business Development, Byron was the Director of Southeast Operations for EGS, Inc. 

Mr. Bush graduated from South Carolina State University.

Dean Campbell

Dean Campbell is the Director of Public Affairs and Project Communications for Savannah River Remediation, the liquid waste contractor at the Savannah River Site (SRS). He focuses on external and internal communications; government affairs at the local, state and federal levels; community relations; and media relations. 

Mr. Campbell joined Westinghouse Savannah River Company in 1989 and has held a number of positions of increasing responsibility in the Public Affairs field at SRS.

Wyatt Clark

Wyatt Clark is the Senior Vice President of Environmental Management Operations for SRNS. He is responsible for the safe execution of all environmental management operations at SRS. 

Clark has 31 years of management experience in the areas of project management, operations, engineering, and maintenance within complex, high-hazard nuclear chemical facilities.

Dr. Paul Cloessner

Paul Cloessner is the Vice President, NNSA Chief Business Officer for Savannah River Nuclear Solutions (SRNS). He is responsible for leadership of the NNSA programs, projects, finance and business services.

Dr. Cloessner received his Bachelor of Science degree in Chemistry from Louisiana State University and his Doctorate in Nuclear Chemistry from The Florida State University.

Mark Davis

As the Deputy, Vice President of NNSA Operations and Programs, he is responsible for the Country’s sole source of tritium products supplied to the warfighter. He retired from the Navy in 2017. 

He received his commission through the NROTC program, graduating as the outstanding student in his department from San Diego State University with a Bachelor of Science in Civil Engineering. He received a fellowship to the Massachusetts Institute of Technology, graduating in 1992 with a Master of Science in Ocean Engineering degree.


Dara Glass

Dara V. Glass heads up the BWXT Aiken office as regional director, managing daily operations for the company. Ms. Glass directs BWXT’s regional and local community outreach efforts and has been with BWXT nearly seven years.

Prior to BWXT, Ms. Glass worked in economic development for 16 years promoting Commonwealth of Virginia communities to corporate executives around the world, creating jobs and capital investment.

Joyce Hopperton

Joyce Hopperton is Director, Environment, Safety, Health, and Quality Assurance for Centerra – Savannah River Site. Her responsibilities include ensuring that Environment, Safety, Health, and Quality Assurance programs meet the Code of Regulations, Department of Energy Orders, and any other regulatory agency requirements.

Fred Humes

Fred Humes is Director of the Aiken/Edgefield Economic Development Partnership. He attended and graduated from North Greenville Junior College. Later, he was awarded a B.S. in Business Administration from the University of Tennessee and an M.S. in Business Management from Troy State University. 

Humes was in the Air Force from 1962 to 1983, had a career in television, and has been a part of the Economic Development Partnership.


Dr. Carol Jantzen

Dr. Carol M. Jantzen retired from the Savannah River National Laboratory (SRNL) after 37 years of service. She received her Ph.D. in Materials Science and Engineering with a specialization in glass chemistry. She developed the statistical process control models for the Defense Waste Processing Facility (DWPF) at SRS.

During her career, she authored over 250 publications and was awarded 11 U.S. patents. She is the recipient of numerous awards and honorary degrees, served as Past President of the American Ceramic Society, and taught as an adjunct professor. She was the recipient of the CNTA Distinguished Scientist award in 1997.

Sue King

Sue King graduated from Virginia Tech with a Bachelors of Science in Chemical Engineering. She has worked in the nuclear industry since 1982. King started at the Charleston Naval Yard refueling nuclear submarines and has since worked for the Department of Energy at SRS and Pantex.

In 2006, she joined the MOX project and recently retired as Vice President of Operations at CB&I MOX Services. 

Sunny Lunka

Sunny Lunka is from Denver, Colorado and holds a Bachelor of Science Degree in Chemical and Biological Engineering from Colorado State University. She currently works for Savannah River Nuclear Solutions (SRNS) as a Shift Technical Engineer in H-Canyon.

Sunny has been involved with CNTA since August 2016 and has been chair of the Young Professionals Committee since it was officially formed in January 2018.

Karl Lutterloh

Karl G. Lutterloh is Vice President and Trust Officer at Security Federal Bank. He is a graduate of the University of South Carolina School of Law and holds a Master of Laws in Taxation from the University of Florida. He is an active member of the South Carolina, Aiken, and Richland County bars as well as the Aiken Young Professionals. 

Dr. Forest Mahan

A native of South Carolina, Forest E. Mahan has spent more than 20 years in the South Carolina Technical College System. He is currently the 5th president at Aiken Technical College.

Mahan received a bachelor’s degree in history from the College of Charleston and a master’s degree in history and a Ph.D. in higher educational administration from the University of South Carolina.

Jesus "Zeus" Mancilla

Jesús “Zeus” Mancilla, PE is an Operations Manager in H-Area, SRS. He provides overall direction and oversite of facility operations to ensure compliance with the safety envelopes while executing Department of Energy directives.

Zeus received a BS from Caltech in Chemical Engineering. Processing experience includes Plutonium, Uranium, and Neptunium.  He switched to Operations after 23 years of increasing responsibility in Engineering, is now very much enjoying the change of pace. 

Matthew McCoy

Matthew McCoy is an Engineer with Savannah River Remediation, supporting the Saltstone Project. He is a former Nuclear Submarine Officer and Lead Project Manager with experience in nuclear power plant operations and management. He is a graduate of the U.S. Naval Academy. 

Craig McMullin

Craig W. McMullin has more than 40 years of experience in the commercial nuclear power industry and at various Department of Energy (DOE) site locations. He retired in 2019 as a Senior Program Manager of Special Projects at the Savannah River National Laboratory (SRNL) for Savannah River Nuclear Solutions (SRNS), LLC.

Mr. McMullin is a graduate of the Massachusetts Maritime Academy with a Bachelor of Science degree in Marine Engineering. He also received a Master of Business Administration from Western New England College.

Nick Miller

Nick Miller is the Facility Manager for the HB-Line Facility at Savannah River Site, the only chemical processing facility of its kind in the DOE complex. He is responsible for the overall safe operation of the facility while meeting DOE missions and directives. 

Miller is the former Operations Manager of L-Area Spent Fuel Basin at SRS. He also served as Construction Supervisor and Engineering Manager for Shipboard and Dockside Nuclear Facilities at Newport News Shipbuilding, supporting the Refueling and Complex Overhaul of A4W Class Aircraft Carriers. 

Chuck Munns

Charles L. Munns is a Commissioner at the South Carolina Commission for Higher Education. Currently the President of Munns Advisement, LLC, Admiral Munns was President and Chief Executive Officer of Savannah River Nuclear Solutions from 2007 through 2009. Previously he served for 34 years in the US Navy attaining the rank of Vice Admiral. 

Admiral Munns received his Bachelor of Science degree from the US Naval Academy, his Master of Science, Computer Science degree from the University of Colorado, and his Corporate Board Directors Continuum Certificate from the University of Chicago School of Business.

Dr. John Veldman

John Veldman retired as Associate Laboratory Director for National and Homeland Security at SRNL after 38 years of service. John served as Chief Engineer on the Integrated Leadership Team for the NNSA Modern Pit Facility. John was appointed manager of Technology Business Development at Savannah River Technology Center, the predecessor of SRNL. He has held many management positions throughout his career.

He received B.S., M.E., and Dr. of Engineering degrees in Mechanical Engineering from Rensselaer Polytechnic Institute, Troy NY. 

Dr. James Corley, Ex-Officio

James H. Corley is Associate Professor in the Department of Radiology at Georgia Health Sciences University Medical College of Georgia (MCG). He received B.S. and M.S. degrees from the University of Georgia, and is Board Certified in Nuclear Pharmacy.

Prior to joining MCG in 1990, Jim served at the Walter Reed Army Medical Center and was Deputy Chief of Nuclear Medicine Service at the Eisenhower Army Medical Center at Fort Gordon. He is an Honors Graduate of the U.S. Army Command & General Staff College, and has authored numerous papers in the Nuclear Medicine field. 

Walt Joseph, Ex-Officio

Walt Joseph is a graduate Mechanical Engineer with a BE degree from North Carolina State College and a MS from the Pennsylvania State University. He served as an officer in the US Army Ordinance Corps in Korea during the conflict.

He was employed for 39 years at the Savannah River Site in a variety of technical and management positions for E.I. Du Pont and the Westinghouse Savannah River Co. He started at the Savannah River Laboratory doing research and development before he transferred to the Savannah River Plant for varied assignments including managing the Traffic and Transportation Department, the L-Reactor restart project, and Site Quality.

Dr. Clint Wolfe, Director Emeritus

Clinton R. Wolfe served as CNTA Executive Director from 2008 through 2015. He obtained B.S. in Chemistry degree from Marshall University and a Ph.D. in Chemistry from the University of New Mexico, with a combined minor in Math and Physics. He worked at the Los Alamos Scientific Laboratory then participated in research and problem-solving for 12 years at the Westinghouse R&D Center.

Dr. Wolfe led research for ten years on nuclear steam generator corrosion issues at the Westinghouse Service Technology Division. In 1988, he joined Westinghouse Savannah River Company (WSRC), where he managed the Strategic Materials Technology Department in the Savannah River National Laboratory (SRNL) from 1996 until his retirement in 2005. 

Dr. Allison Hamilton Molnar, Director of Operations

Dr. Allison Hamilton Molnar has been involved with local governments and non-profit work since high school. At CNTA she organizes events, is the point of contact for members, provides payroll and accounting services, and works behind the scenes so CNTA can function efficiently. She also currently serves as CNTA’s webmaster.

Prior to joining us, Allison was a professor of Political Science at USC-Aiken. She is active in the Aiken community, serving on the Board of Directors for the Cumbee Center, and volunteering with FOTAS.

She received her Master’s and PhD in Political Science from the University of Iowa, a Master’s Degree in Applied Politics from the University of Akron, and attended Grand Valley State University for her bachelor’s degrees.