The U.S. Department of Energy Office of Environmental Management is cleaning up nuclear weapons production and government-sponsored research sites nationwide.
Washington, DC
Joined September 2019
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One year of historic results! Under Assistant Secretary Tim Walsh, DOE-EM is driving historic cleanup & catalyzing American energy hubs backed by $650B in private investment at Portsmouth, Paducah & Oak Ridge to lead future computing and energy production. bit.ly/4zoUk7r
A new community center will be built in Scarboro through an EM-funded grant.
This is the first investment in the historic Oak Ridge community since WWII.
From cleanup to community renewal, EM is helping create lasting opportunities.
.@ENERGY recently honored 7️⃣ EM employees and teams with Secretary’s Honor Awards.
Their work is making a difference—accelerating cleanup, advancing nuclear energy, and saving millions in taxpayer dolars.
Congratulations to all of this year’s honorees!👏👏👏
⚛️ It's #NuclearScienceWeek! SRNL is one of @energy’s 17 national labs and under @EMcleanup sponsorship. We’re leveraging 70+ years of innovation and R&D to drive breakthroughs in SI, nonproliferation, tritium science & advanced manufacturing. Putting science to work. 🔬
Crews @SRMCompletion filled the first mega-size Saltstone Disposal Unit with grout, permanently stabilizing Cold War legacy salt waste.
A new 24-hour processing record was set along the way!
Read the full story here ➡️ bit.ly/3UEXAMy
ALT Aerial view showing Saltstone Disposal Unit (SDU) 6, center, surrounded by other massive disposal units at the Savannah River Site. SDU 6 was the first mega-size SDU to be built at the site, and it’s now filled with grout.
Portsmouth hit a big milestone: 4,500 legacy DUF6 cylinders converted—over 20% of the site's inventory.
That's 135,000 hours of work and counting!
The team also beat its FY2026 goal by two months. 👍energy.gov/em/articles/ports…
DOE Environmental Management retweeted
It was a pleasure to host @ENERGY @ScienceUnderSec Gil and Kristen Ellis at @SRNLab. I enjoyed discussing our mission and the incredible work that our team is doing, from fusion to SI to nuclear materials. Exciting things are ahead!
#Science #FusionEnergy #SI
#WePutScienceToWork
⚡ Nuclear summits. Glovebox stabilization. Cancer research. $10B in economic investment.
The latest EM Update has it all! Subscribe and never miss a mission update at bit.ly/4B9XUn3.
Oak Ridge cleanup:
👉20+ acres cleared for reuse,
👉cancer research enabled,
👉$10 billion in economic investment attracted.
The community got a full update at a recent open house, and plans for 2027 are even bigger.
Read the full story here 👇bit.ly/4k0RsbG
That's A WRAP — Teamwork Drives Glovebox Stabilization at Hanford
Three @HanfordSite contractor teams worked together to safely stabilize 12 contaminated gloveboxes at the WRAP facility. The result? $8 million in annual savings and reduced long-term risk! bit.ly/4i8rmkO
EM sites helped win WWII and the Cold War. Now they're becoming hubs for advanced nuclear, Super Intelligence, and manufacturing. At the SC Nuclear Summit, EM Assistant Secretary Tim Walsh explained how work is already underway at sites across the country! bit.ly/4ijDzUJ
ALT Collage of four photos featuring EM Assistant Secretary Tim Walsh speaking and participating in group/panel discussions at the SC Nuclear Summit. The top-right photo shows a screen behind seated panelists that reads: "New Missions, Same Ground: How Federal Land is Becoming the Platform for Advanced Nuclear and AI Infrastructure."
🚛 WIPP driver Tommy Cash has logged 3.6M+ safe miles over 43 years and just earned his second national safety award of 2026. He's one of only 36 drivers in the U.S. certified to transport transuranic waste to WIPP.
🌏 EM Assistant Secretary Walsh traveled to Japan to advance nuclear cleanup & energy cooperation under President Trump's diplomatic agenda. The trip included a tour of Fukushima Daiichi visit to Japan Nuclear Fuel Limited's reprocessing plant. Full story: energy.gov/em/articles/assis…
DOE Environmental Management retweeted
.@SecretaryWright explains how Department of Energy’s Nuclear Lifecycle Innovation Campuses will help power America’s future.
WATCH ⬇️
🏆 DOE honored 7 EM teams & individuals with Secretary's Honor Awards — from the Hanford team that solidified waste in glass for the first time, to SRS drone teams closing tanks ahead of schedule. These are the people powering America's nuclear future.
energy.gov/em/articles/celeb…
DOE Environmental Management retweeted
FY 2026 brought major cleanup progress in Oak Ridge:
🏗️ Alpha-2 demolished
🚧 Isotope Row removal underway
☢️ U-233 processing passed the halfway point
💰 $175M in estimated savings
🌎 EMDF closer to construction
📈 $6.7B investment + ~1,100 jobs
➡️ youtu.be/CJXSZUadMxE
Shovels ready in Idaho!
Crews are making final preparations to build a multilayer, natural-style cap over a 97-acre legacy landfill to further safeguard the vital Snake River Plain Aquifer.
Read about this major effort: energy.gov/em/articles/shove…
Demolishing a 33-acre legacy building takes serious coordination. Discover how Portsmouth Site teams engineered a new equipment database that keeps tools sharp, schedules steady and costs under control.
energy.gov/em/articles/new-p…
Assistant Secretary Tim Walsh conducted an interview at the West Valley Demonstration Project that you will not want to miss!
Hear EM’s top leader discuss the site’s history, latest progress updates, and vision for the future: youtube.com/watch?v=gGZlkgYc…