US laser fusion company Xcimer Energy has announced the expansion of its Colorado operations with the addition of approximately 16,000 square feet of office space in Denver, effective 1 June, as the company accelerates its growth toward building the first commercial laser fusion power plant. The new facility at 4880 Havana Street complements Xcimer's existing 74,000-square-foot headquarters and laser facility, bringing the company's total Denver footprint to approximately 90,000 square feet.

The Denver Post reported that Xcimer employs nearly 200 people and plans to double its workforce over the next year, adding engineers, programme managers, and business professionals across its energy and defence programmes as the fusion energy industry crosses from laboratory research to industrial-scale development.

Xcimer is developing an excimer-laser-based inertial fusion architecture using krypton-fluoride lasers, an approach the company argues allows longer pulses, higher efficiency, and a lower cost per joule than the solid-state glass lasers used at the National Ignition Facility. The company completed its Long Pulse Kinetics platform in June 2025, described as the first privately built system of its kind in more than two decades, and is on track to demonstrate its Phoenix prototype laser system in 2026.

Xcimer's next major target is Vulcan, a multimegajoule laser complex targeting engineering breakeven from fusion around 2030, for which the company has begun a multistate site search. Commercial fusion power plants delivering electricity to the grid are targeted for the mid-2030s.

The company has received backing from leading climate technology investors and has been selected for funding by the US Department of Energy. A recent industry analysis identified more than 1,000 open roles across fusion companies in early 2026, with engineering and operations positions now outpacing physics roles, reflecting a sector transitioning from scientific validation to commercial infrastructure.

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