About Us

Bob Wilkinson, President & General Manager

Bob Wilkinson served as CEO of Mission Support Alliance prior to leading Hanford Site services in his current role at HMIS. His Hanford experience is vast, including roles in operating nuclear facilities, project management, engineering, emergency response, environmental compliance and more. Bob has an MBA from Eastern Oregon University and is a longtime Tri-Citian. Bob serves on the board for the Washington State STEM Education Foundation and performs other volunteer work with his family. In his off time, Bob and his wife enjoy spending time in the great outdoors, including Bob’s love of camping, fishing and hunting.


Amy Basche, Chief Operations Officer

Amy Basche first worked at Hanford as part of the re-start of the 242-A Evaporator Facility. In more than 30 years since, she’s held roles as a training coordinator, manager for Tank Farm contractors and strategic planner. In the last decade, Basche served in a variety of executive management roles. She has an MBA from City University and is a diehard Gonzaga Bulldogs fan. She runs on coffee, enjoys party planning and tracing her ancestry. Basche has been a classroom volunteer for Junior Achievement for more than 20 years and served on the JA Board of Directors for eight years. She also serves on the board for the Tri-City Regional Chamber of Commerce.


Todd Beyers, Senior Vice President for Workforce Solutions

Todd Beyers was born and raised in the Tri-Cities and spent his entire career in his hometown, first starting at Hanford in 1991. He received a business degree from Eastern Washington University and his human resources background includes a current focus on employee and career development. An avid golfer, Beyers has racked up eight holes-in-one, and also enjoys fishing and snow skiing. An alumnus of Columbia Basin College, Beyers serves on the CBC Foundation Board.


Diane Cato, Senior Vice President of Engineering, Projects & Technology

After managing engineering activities at both Savannah River and Idaho DOE sites, Diane Cato first worked at Hanford as part of the Tank Farms contract transition. She has more than 30 years of experience in DOE facility engineering and operations and an MBA from NOVA Southeastern University. Cato serves as board president of Safe Harbor Support Center, and she and her husband enjoy traveling in their free time.


David Chase, Senior Vice President of Safeguards, Security and Emergency Response

David Chase is a decorated Army veteran who has served in numerous domestic postings as well as in Germany, Panama, Afghanistan and Iraq. Chase has a master’s degree in public administration from the University of Nevada at Reno. This experience assists in his role overseeing Hanford Patrol, the Hanford Fire Department and Emergency Operations Center. Chase is a history buff and has visited most Civil War battlefields, and made many trips to Little Bighorn. He and his wife have five children and one grandchild.


Casey de Groof, Chief of Patrol, Hanford Patrol

Casey de Groof first joined Hanford Patrol in 2004, and has served as Chief since 2016. She serves as a battalion commander in the National Guard and previously served as a military intelligence officer in the U.S. Army, where she earned a B.A. in Criminal Justice and an AA in Arabic Studies. In her free time, de Groof enjoys traveling, hiking and spending time with family.


Todd Eckman, Senior Vice President of Information Management Services

Todd Eckman has spent three decades in the information technology field and “lives, breathes and dreams about IT.” Eckman is a graduate of Perry Technical Institute and supports a number of local non-profits, including Second Harvest, United Way of Benton and Franklin Counties and the Women Helping Women Fund Tri-Cities. He enjoys spending time with his family (including grandchildren and pets), hiking, watching sports and playing pool volleyball.


Rick Millikin, Senior Vice President of Business Integration & Operations

Rick Millikin first arrived on the Hanford Site in the 1980s and has since worked at a variety of technically complex DOE sites across the country, before returning to Hanford. After a childhood in Indiana, Millikin received a business management degree from Purdue University. The close proximity to Illinois led him to become a sports fan for all Chicago teams (Cubs, not White Sox), and he tries to attend a game at Wrigley Field at least once a year. Millikin serves on the board of the Children’s Reading Foundation of the Mid-Columbia and was a long-time board member for the Tri-Cities Cancer Center Foundation. An avid musician, Millikin owns multiple guitars and also sings in a local “garage” band.


Todd Roper, Fire Chief, Hanford Fire Department

A Texas transplant, Todd Roper arrived in the Tri-Cities by way of Saudi Arabia, where he had most recently served as fire chief for the Abqaiq Fire Protection Unit, overseeing 250 Saudi nationals. During his time there, the country welcomed its first two women as firefighters. Roper has made emergency management his lifelong passion, attaining a master’s degree in public administration. He and his wife enjoy CrossFit, hiking and paddleboarding.


Todd Synoground, Senior Vice President of Infrastructure and Site Services

Todd Synoground arrived in the Tri-Cities to work as a nuclear chemical operator in the 1980s, following a degree in organizational management from Ashford University. He has vast experience in DOE nuclear and site infrastructure facilities and programs. Synoground’s wife is part of HMIS’ Radiological Assistance Program, and they have two adult children. Synoground is an expert in hunting dogs, owning four certified hunting dogs and earning his own certification in judging and certifying other hunting dogs.


Brian Von Bargen, Senior Vice President of Interface & Integration Services

Spending more than 30 years working on the Hanford Site, Brian Von Bargen has served in numerous executive positions since graduating with a chemical engineering degree from the University of Idaho, the same school where three of his children have graduated from or currently attend. His decades on the site give him a full view of the spectrum of the One Hanford mission. Von Bargen and his wife make frequent trips to enjoy the Idaho wilderness, visit family or take in a Vandals football game.


Mike Wilson, Senior Vice President of Mission Assurance

Mike Wilson arrived at Hanford from the east coast in the mid-90’s and has never left. He’s worked in a number of roles, including strategic planning, contracts and procurement, and leadership roles. A graduate of California University of Pennsylvania, Wilson is a longtime Rotarian and charter member of the Columbia Valley Daybreak Rotary. He and his wife have three adult sons and enjoy barbecuing and RV’ing throughout the Pacific Northwest.


Daryl Witherspoon, Chief Counsel

A North Carolina native, Daryl Witherspoon earned his juris doctorate from Valparaiso and served as a Judge Advocate General in the U.S. Army, with duty stations in the U.S. and abroad, including Germany, Kuwait and Afghanistan. It’s a far cry from Witherspoon’s first job as a school bus driver at age 16! Daryl and his wife have three grown daughters who live on the east coast, and in his free time, Daryl can be found skateboarding or flying drones.

Last Updated 03/25/2021 10:33 AM