T-Mobile's Deeanne King says smarter buildings and solar are cutting both emissions and costs
The Bellevue telecom's emissions were 50% below its 2020 baseline in 2025, and smarter HVAC saved nearly $5 million.
Deeanne King, executive vice president and chief people officer at Bellevue, Wash.-based T-Mobile, who also helps lead the company’s sustainability work, says the biggest gains often come from doing the basics well. Managing building heating and cooling more intelligently produced nearly $5 million in estimated energy savings in 2025.
T-Mobile had 132 community solar projects in its portfolio as of 2025, with an estimated lifetime saving of $60 million in energy costs, and its total emissions in 2025 were 50% lower than its 2020 baseline. The company has signed the Climate Pledge, committing to net-zero carbon by 2040.
“You can’t let the size of the problem become the reason you don’t start,” King said. “When something feels enormous, I focus first on what we can control.”
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