stars 1 stars 2 stars 3

Upper 90 has been an independent, locally-owned energy service company (ESCO) in South Central Wisconsin. Upper 90 has evolved during this time, beginning with a strict focus on LED lighting solutions. We have expanded our offerings to include all types of facility and infrastructure improvements. Our three core principles have propelled Upper 90 to the forefront of the energy efficiency contracting industry in Wisconsin. We also offer flexible contracting options, where the costs associated with construction risk can be absorbed and mitigated by other parties—instead of entirely by one party (Upper 90). This flexibility reduces the overall project cost and is not typically offered by larger firms.

Upper 90 Questions

The Upper 90 annual revenue was $4 million in 2026.

Mario Millonzi is the President of Upper 90.

4 people are employed at Upper 90.

Upper 90 is based in Sun Prairie, Wisconsin.

The NAICS codes for Upper 90 are [54169, 54, 541, 5416].

The SIC codes for Upper 90 are [874, 87].

Top Upper 90 Employees

View Similar People
G2 Leader Summer 2026 G2 Best Est ROI Mid-Market Summer 2026 G2 Easiest Admin Mid-Market Summer 2026 G2 Most Implementable Summer 2026 G2 Best Results Mid-Market Summer 2026 G2 Lead Capture Mid-Market Summer 2026 Inc Fastest Growing Private Companies 2026 Inc Best Workplace 2026
g2crowd
G2Crowd Trusted
chromestore
300K+ Plugin Users