Az Big Media will be profiling one of the Most Influential Women in Arizona for 2026 each day leading up to the celebratory dinner on August 20, 2025. Today, meet Brooke Westemeier, Arizona managing partner for EY.

From a field of more than 2,200 women under consideration, the Most Influential Women in Arizona were selected by the editorial board of Az Business magazine and a panel of 12 former Most Influential Women. The Most Influential Women in Arizona Business for 2026 will be honored at a celebratory dinner on Aug. 20, 2026, at Chateau Luxe in Phoenix. The Spotlight Award Sponsor for the Most Influential Women of 2026 is CORE Construction, the Special Gift Sponsor is Tarbell’s, the VIP Sponsor is GCON, the VIP Reception Sponsor is Cullum Homes, the Cover Photo Shoot Sponsor is Greenberg Traurig, the Beverage Sponsor is Arizona Escrow & Financial, the Valet Sponsor in Stevens-Leinweber, the Floral Sponsor is PCL Construction, the Dessert Sponsor is SottoPelle and Tutera Medical, the 360 Photo Booth Sponsor is Clayco, the Step-and -Repeat Sponsor is Morris Hall, the Digital Sponsor is Desert Diamond Casinos, the Floral Provider is PJs Flowers and the Production Sponsor is Merestone. 

WOMEN IN BUSINESS: The Most Influential Women in Arizona for 2026

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Brooke Westemeier, Arizona managing partner, EY

Background: As the EY Arizona managing partner, Westemeier leads over 430 professionals across offices in Phoenix and Tucson. Her in-depth industry knowledge and 20+ years of accounting experience prepared her well for this leadership role, and since being named OMP in 2024, she’s overseen consistent growth within her offices. Brooke also mentors the next generation of local leaders through initiatives like the Arizona Women’s Leadership Forum.

Advice to younger self: “Believe in yourself. Confidence and belief are so essential for young professionals, who are often much more capable than they may think. I see this all the time in my role, which is why, at EY, we prioritize mentorship and invest a lot of time into developing professionals early and throughout their careers.”

Surprising fact: “Many people I meet for the first time think I’m an Arizona lifer, which I take as a compliment! But I was born and raised in Iowa. Arizona is my home, and there isn’t anywhere else I’d rather work, but Iowa will always be special to me, too.”