Professional woman with long blonde hair is smiling, wearing a patterned blouse. Text reads WM Distinguished Service Award 2026, Christine Gelles. Logos for Geosyntec Consultants and Longenecker & Associates are also visible.
Published On: February 18th, 2026

Christine Gelles Earns WM2026 Distinguished Service Award

Christine Gelles has earned the Waste Management (WM) Distinguished Service Award for 2026. She will be honored at the WM Symposia, Inc. 2026 Waste Management Conference (WM2026), which will take place from March 8 to 12 in Phoenix, Arizona.

Christine is the Operations Vice President for Longenecker and Associates, A Geosyntec Company (L&A). She joined L&A in 2016, after a 23-year career with the United States Department of Energy (DOE), primarily with the Office of Environmental Management (EM) leading waste management policy and strategy. Christine has held many waste leadership positions, including Deputy Assistant Secretary for Waste Management.

As a Senior Advisor to the International Atomic Energy Agency’s Network for EM and Remediation, she has led technical projects to facilitate the transfer of US radioactive waste strategies and share lessons learned worldwide. Christine received the 2011 Richard S. Hodes Honor Lecture Award in recognition of her innovation in low-level waste management.

About the WM Distinguished Service Award

The WM Distinguished Service Award recognizes a recipient’s leadership in helping solve major radioactive waste challenges, honoring those who have significantly accelerated the ultimate end state solutions to radioactive waste disposition and benefited the broader radioactive waste management community at large.

About the Waste Management Conference

The annual Waste Management Conference, hosted by WM Symposia, Inc., is a leading global conference that addresses the management of radioactive waste and related topics. WM Symposia, Inc. is a nonprofit organization that provides education and information exchange on global radioactive waste management.

More Information

Read the press release.
Learn more about WM Symposia, Inc.
Learn more about Christine: Christine Gelles
See how Geosyntec’s acquisition of Longenecker and Associates benefits our clients in the acquisition press release.