Mark Chalmers

Mark Chalmers
Nationality	American
Occupation	Mining executive, Chief Executive Officer
Title	President and Chief Executive Officer
Employer	Energy Fuels Inc.
Known for	Leading Energy Fuels Inc. as the largest operating uranium producer in the United States and expanding its rare earth element production capabilities

Mark Chalmers is an American mining executive serving as President and Chief Executive Officer of Energy Fuels Inc., the largest operating uranium producer in the United States. He took the helm of a company that had weathered years of depressed uranium prices and transformed it into a dual-commodity operation, one that mines and mills uranium while simultaneously producing rare earth element concentrates at a facility that stands as the only conventional uranium mill operating in the country. Under his leadership, Energy Fuels positioned itself at the intersection of two industries that the United States federal government has identified as critical to national security: domestic uranium supply and the rare earth supply chain. Chalmers has been a persistent voice in Washington advocating for policies that support American uranium mining at a time when the country imports the majority of its nuclear fuel from foreign sources, including Russia and its allies.

Career

Background in Uranium and Mining

Chalmers brought decades of experience in the uranium and mining industries to Energy Fuels. Before assuming the top role at the company, he held senior operational and technical positions within the uranium sector, developing expertise in mine development, mill operations, and the regulatory environment that governs nuclear fuel production in the United States. His background encompassed both the technical dimensions of in-situ recovery and conventional uranium milling, the two primary methods used to produce uranium oxide, known as yellowcake, in North America.

Leadership at Energy Fuels Inc.

Chalmers became President and Chief Executive Officer of Energy Fuels Inc. and has held the role through one of the most volatile periods in uranium market history. Energy Fuels is incorporated in Canada and listed on the Toronto Stock Exchange and the NYSE American exchange, with its primary operations conducted in the United States across Colorado, Utah, Arizona, and Wyoming.

The company's flagship asset is the White Mesa Mill in Blanding, Utah, which is the only fully licensed and operating conventional uranium mill in the United States. The mill has a licensed capacity to process more than 8 million pounds of uranium oxide per year and serves as the processing hub for ore produced at Energy Fuels' network of mines across the Colorado Plateau and Wyoming.

Uranium Market Advocacy and Policy Engagement

Chalmers has been an active participant in federal policy discussions surrounding uranium production. The United States historically produced a substantial share of the uranium used in its nuclear reactors domestically, but by the late 2010s that share had fallen to a small fraction of total consumption. In 2018, Energy Fuels and another American uranium producer jointly filed a petition under Section 232 of the Trade Expansion Act, arguing that the dependence on foreign uranium constituted a threat to national security. Chalmers was a central figure in that effort, testifying before federal panels and making the case that American uranium mining infrastructure would atrophy permanently without policy intervention.

The Section 232 petition did not result in import quotas, but it did lead to the formation of the United States Nuclear Fuel Working Group, which in 2020 released a report calling for the establishment of a strategic uranium reserve. Congress subsequently appropriated funds to begin purchasing domestically produced uranium for that reserve. Energy Fuels was among the producers that entered into contracts to supply uranium to the reserve, providing a direct revenue stream from the federal government at a time when uranium spot prices remained depressed.

When Russia's full-scale invasion of Ukraine in February 2022 prompted renewed scrutiny of American dependence on Russian nuclear fuel, Chalmers became a frequently cited voice in media coverage of the uranium supply chain. He argued consistently that the United States needed to rebuild domestic production capacity rather than simply shift imports from one foreign supplier to another. In 2024, the United States enacted legislation banning the importation of Russian uranium, a development that Chalmers and Energy Fuels had advocated for over several years.

Expansion into Rare Earth Elements

One of the most significant strategic decisions made under Chalmers' tenure was the pivot to rare earth element production at the White Mesa Mill. Rare earth elements, a group of 17 metallic elements used in electric vehicle motors, wind turbines, defense systems, and consumer electronics, have been subject to intense supply chain concern in the United States because the overwhelming majority of global processing capacity is located in China.

Energy Fuels announced that it had developed a process to recover a mixed rare earth carbonate as a byproduct of uranium milling operations. The White Mesa Mill began accepting monazite sands, a mineral rich in rare earth elements, from external suppliers and processing them into a mixed rare earth carbonate that could then be sent to downstream separation facilities.

Chalmers framed this expansion as a natural extension of existing infrastructure rather than a departure from the company's core business. The mill already handled radioactive materials under a robust regulatory framework, making it technically capable of processing monazite, which contains naturally occurring radioactive material. The argument was that White Mesa Mill represented infrastructure that would be difficult and expensive to replicate and that its existing licenses and operational knowledge gave Energy Fuels a meaningful head start in building an American rare earth processing capability.

The company subsequently entered into a supply agreement with Astron Corporation, an Australian mineral sands company developing the Donald Mineral Sands Project in Victoria, Australia, to supply monazite concentrate to the White Mesa Mill. This represented an effort to secure a long-term feedstock supply beyond spot purchases.

By 2023 and into 2024, Energy Fuels had shipped multiple commercial batches of mixed rare earth carbonate to Neo Performance Materials in Europe for separation, and the company announced plans to evaluate constructing its own rare earth separation and potentially metal-making capabilities at or near the White Mesa Mill site. Chalmers described the goal as building a fully integrated American rare earth supply chain, from ore to separated oxides to metals, that could serve American and allied manufacturers of electric vehicles and defense equipment.

Mine Operations and Portfolio Management

Beyond White Mesa Mill, Energy Fuels under Chalmers has maintained and in some cases reactivated a portfolio of uranium mines across the American Southwest and Wyoming. The Pinon Plain Mine in Arizona, formerly known as the Canyon Mine, is among the higher-grade conventional uranium mines in the United States and was advanced toward production under Chalmers' leadership. The company also holds the Nichols Ranch in-situ recovery project in Wyoming and a collection of standby and development-stage mines on the Colorado Plateau.

The management of this portfolio has required ongoing decisions about which assets to place on standby during periods of low uranium prices and which to bring back into production or care-and-maintenance mode as market conditions improved. The uranium spot price, which had fallen to multi-decade lows in the late 2010s in the aftermath of the 2011 Fukushima disaster, began a sustained recovery beginning around 2021 and accelerated sharply through 2023 and into 2024. Energy Fuels increased production activity in response, and Chalmers communicated the company's production ramp-up plans to investors across multiple earnings calls and investor presentations during this period.

Financial Stewardship

Energy Fuels entered periods of uranium price weakness with relatively conservative balance sheet management. The company maintained a working capital position that included holdings of physical uranium, pounds of uranium oxide held in inventory, as well as cash and short-term investments. Chalmers consistently highlighted the physical uranium inventory as a form of use to uranium price recovery that did not require immediate capital expenditure on mine construction.

The company raised capital through equity offerings during periods of stronger share prices, using proceeds to fund rare earth development, mine preparation, and working capital. Chalmers oversaw these capital allocation decisions while balancing the needs of existing shareholders against the long-term investment requirements of both the uranium and rare earth strategies.

Recognition

Chalmers has been cited in major financial and industry publications as a leading voice on American uranium supply chain issues. Reuters has quoted him in multiple reports on the domestic uranium industry, and his commentary has appeared in coverage of U.S. energy security debates in outlets including Bloomberg and S&P Global Commodity Insights. He has testified or presented at industry conferences including those organized by the Uranium Producers of America and has been a recurring participant in investor conferences covering the nuclear fuel and critical minerals sectors.

Energy Fuels' dual positioning in uranium and rare earth elements has attracted coverage in S&P Global Market Intelligence reports on critical minerals, reflecting the company's emergence as a subject of interest beyond traditional uranium investing audiences.