Founded in 1969 and headquartered in Reston, Virginia, ICF (NASDAQ: ICFI) is a ~9,000-person consultancy with a deep energy efficiency program implementation practice. Their utilities vertical designs and runs residential and commercial programs for major investor-owned utilities, municipal utilities, and cooperatives.

For HVAC contractors, ICF is the company behind many of the largest utility HVAC rebate programs in the U.S. They've processed over $3.1 billion in energy efficiency rebates and were awarded $65 million in new efficiency contracts from BGE in Q4 2024.

Beyond program implementation, ICF brings consulting depth in policy analysis, IRA/BIL funding strategy, grid modernization, and decarbonization.