Since our founding in 1978, HMT has led the energy industry in aboveground tank technology and environmental solutions for oil and gas storage.

HMT’s agile global team partners with our clients to help them meet a full range of energy storage and environmental challenges. We enable them to reduce emissions, optimize tank capacity, and recover stranded inventory. We engineer tank systems that exceed safety standards, reduce downtime, extend maintenance intervals and, overall, protect the environment.

Among HMT’s products are internal and external seal systems including gas-tight primary seals, floating suction and drain systems, aluminum dome roofs, pontoon floating roofs, full-contact floating roofs, seamless compositive roofs, and emissions reduction devices.

HMT offers design, construction, maintenance, inspection, and repair services that optimize tank efficiency, safety, and operational and environmental performance.

In 2020, HMT acquired Dunham Engineering, a leading structural and corrosion engineering firm specializing in tanks and towers. In 2021, HMT also acquired ALLENTECH, a leading global supplier of aluminum internal floating roofs, further expanding our footprint in the storage tank industry. The acquisition enhances our value-added engineering, spill control/prevention, hydrostatic testing, and overall inspection and design capabilities for existing tanks and terminals.

HMT operates throughout the U.S. as well as Europe and the Middle East. We serve sectors including chemical, petrochemical, pipelines, refineries, marketing terminals, mining, water treatment, wastewater treatment, water storage, food processing, and renewables, including biofuels.

Setting the Standard as an Industry Leader


At HMT, we are driven by our commitments and double down on them. They include mitigating risks to the environment; safeguarding the well-being of employees, community members, and other stakeholders; and helping our customers operate responsibly, efficiently, and safely. We aim to be the industry’s key environmental resource.

We recognize that even as the world adopts different sources of energy, fossil fuels will continue to be a major energy resource for decades to come. In that context, all of our work—services, products, and innovations—is focused on controlling emissions in order to reduce hydrocarbons in the atmosphere and increase the efficiency, safety, and profitability of the energy industry.


Provide tailored solutions to elevate performance across the globe.


Lead the industry with best-in-class products and services by investing in a team of forward thinkers that push the limits of processes and technology to solve the challenges that are vital to our customers and the environment.

Core Values

Forward-thinking Partnership Agile 

Stewardship Grit

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