Top Energy Companies in Washington, DC (83)

CleanChoice Energy is a clean energy supplier whose mission is to make 100% renewable energy available to everyone.

ACORE is a national nonprofit organization that unites finance, policy, and technology to accelerate the transition to a clean energy economy. It promotes investment in American clean energy infrastructure, development, and innovation.

Venture Global LNG is a long-term, low-cost producer of North American liquefied natural gas (LNG). Our two export facilities, Calcasieu Pass and Plaquemines LNG, will supply the world’s growing demand for low-cost, clean and reliable North American energy.

The World Resources Institute is a global research organization that works to improve people's lives, protect nature, and stabilize the climate by conducting research and informing policy.

Steer is a global consultancy that provides strategic, commercial, and technical expertise to transport, cities, infrastructure, and energy projects worldwide. The firm helps clients navigate complex challenges by delivering powerful, evidence-based solutions. With a focus on planning and economic development, Steer supports government agencies and private sector organizations in enhancing their infrastructure and operational potential, ensuring sustainable and efficient outcomes...

Deep Isolation offers an innovative solution to secure and dispose of spent nuclear fuel from commercial nuclear reactors. Our horizontal drill hole technology offers both safety and low cost. While the drilling technology is standard, Deep Isolation is the first company proposing to use this method for the safe isolation of spent nuclear fuel under a billion tons of rock...

Arcadia's clean energy tech platform gives everyone easy access to clean energy. Arcadia members have access to a mobile-optimized online dashboard where they can manage their account, track their account activity, and view their energy usage all in one place. Arcadia's digital transformation of the traditional energy utility gives individuals greater control over what energy they support, how much it...

Vanderweil is a mechanical, electrical, plumbing, fire protection, technology, sustainability, commissioning, and power engineering firm dedicated to providing customized and innovative engineering solutions through excellent client service. We have designed MEP/FP systems for buildings of all types and sizes, as well as cogeneration plants up to 50 MW, chilled water plants up to 100,000 tons, hundreds of miles of transmission...

The Sierra Club is the largest and most influential grassroots environmental organization in the United States. For over 130 years, it has worked to promote clean energy, safeguard community health, protect wildlife, and preserve wild places. Through grassroots activism, public education, lobbying, and legal action, the organization mobilizes millions of members and supporters to defend the right to a healthy...

Advanced Energy United is a national industry association representing businesses that deliver advanced energy and transportation solutions. It educates, advocates, and activates in decision-making venues nationwide, working with member companies, policymakers, regulators, and market stakeholders. The organization promotes competition, economic opportunity, lower consumer costs, energy reliability, resilience, and policies supporting a secure, clean, affordable energy system and a 100% clean-energy...

Sparkfund powers organizations by providing access to the latest energy technology in a new and better way—through a simple monthly subscription model backed by a no risk guarantee. We partner with contractors, ESCOs, manufacturers, utilities, and energy retailers to deliver the Sparkfund Technology Subscription, transforming how businesses implement energy technology. Sparkfund seeks to create positive change for the world by...

Altamira is your trusted partner in consulting, engineering, and field service support. The combination of our owner’s mentality, commitment to hearing your needs and concerns, and delivering with our proven processes help ensure project success. With our regulatory expertise and agile approach, we create working relationships that value compliance and deliver desirable outcomes that bolster your bottom line.

Stratacomm is an independently-owned marketing communications agency specializing in transportation and energy communications, offering integrated solutions to drive change and achieve measurable client success.

Equinor is an international energy company headquartered in Stavanger, Norway, established in 1972. Its business combines oil and gas with a growing power business, supported by trading and market expertise. Equinor’s mission is to create value and build industry through its energy activities, with a broad international presence and a portfolio spanning conventional energy and power markets, with global operations.

American Petroleum Institute (API) is the national trade association representing all segments of the U.S. natural gas and oil industry, with about 600 members producing, processing, and distributing much of the nation’s energy. It advocates on public policy, develops standards and certification programs, and conducts research and publishes industry statistics. Formed as a standards-setting organization, API promotes safe, efficient, and...

Home Energy Medics is a full-service home performance company founded in 2009 and based in Arlington, VA. It conducts home energy audits and delivers home performance improvements—insulation and air sealing, duct sealing, HVAC, windows and doors, noise reduction, and whole-home electrification—to improve home comfort, health, and energy efficiency while lowering heating and cooling costs. Serving Northern Virginia, Maryland, and metro...

Zeno Power is the leading developer of nuclear batteries that provide reliable, clean energy in frontier environments. By harnessing the heat from radioisotopes, Zeno’s batteries power critical missions on Earth, in space, and at sea.

Distributed Sun (DSUN) is a renewable energy services provider and solar developer founded in 2009. The company develops, constructs, finances, and operates commercial, community, and utility-scale solar projects and distributed generation. It specializes in integrating solar solutions with adjacent technologies, such as energy storage and microgrids, and provides tax equity syndication to help enterprises achieve ambitious decarbonization goals and optimize...

Kaluza is an energy software company powering the future of energy. From revolutionising billing to smart electric vehicle charging, Kaluza’s technology is empowering some of the biggest energy suppliers to better serve millions of customers. Its real-time cloud platform transforms supplier operations, reducing cost to serve and boosting customer engagement. Powered by Kaluza, suppliers can invest in innovating for tomorrow’s...

Canam Steel Corporation is a major US manufacturer of highly engineered steel products, specializing in open web steel joists and steel deck. Operating six fabrication facilities across the United States, CSC provides custom solutions and additional value through engineering, design-build, and project management services for projects ranging from small retail centers to large distribution centers and high-rises.