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MARS Energy to acquire Citadel Roofing & Solar

By Kelly Pickerel | August 28, 2026

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MARS Energy Group announced it has acquired Citadel Roofing & Solar, a contractor based in Northern California. The acquisition adds more than 1,000 employees to the MARS platform.

Citadel Solar & Roofing

The partnership expands the MARS presence across California and further strengthens its integrated residential roofing and solar platform, the company says. Citadel’s leadership in Northern California’s new construction roofing and solar market complements the broader MARS capabilities across commercial and residential energy solutions, better positioning the combined organization to support homebuilders throughout California, expand service offerings, and invest in technology and operational excellence.

“There are acquisitions, and then there are partnerships that simply feel like they were meant to be,” said Manvendra Saxena, Founder, Chairman and CEO of MARS Energy Group. “Citadel is the latter. Dieter and the entire Citadel team have built an exceptional business known for operational excellence, strong customer relationships, and an outstanding culture. From our very first conversation, the values and vision aligned, and everything about it felt right. This partnership is not about changing what has made Citadel successful. It is about investing in it. Together, we will keep building on this platform, preserving the key people, culture, and customer focus that have defined both organizations.”

Citadel will continue to operate under the leadership of Dieter Folk, Helmut Gehle, Eric Owen, Wendi Zubillaga, Stephanie Crichton, Jeff Maxfield, and the rest of the existing management team. Customers will continue working with the same team they know and trust.

“This partnership represents an exciting new chapter for Citadel,” said Dieter Folk, President of Citadel Roofing & Solar. “As we looked toward the future, it was important to find a partner who believed in our people, respected our culture, and shared our commitment to serving customers the right way. We found that in MARS. Joining the platform gives us additional resources, operational support, and room to keep growing, while preserving the values and relationships that have made Citadel successful. Our employees, customers, and partners can expect the same team and the same commitment to excellence, now backed by an even stronger platform.”

News item from MARS

About The Author

Kelly Pickerel

Kelly Pickerel has more than 15 years of experience reporting on the U.S. solar industry and is currently editor in chief of Solar Power World. Email Kelly.

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