July 20, 2026 - RubinBrown, one of the nation’s top 50 accounting and business consulting firms, recently promoted Ron Bruner; Jim McMahon; John Turcich; and Katelyn Rattner, CISA®, to Partner in the Consulting Services Group. Jenna Matthias, CPA, was also named Partner in the Assurance Services Group.  

Ron Bruner is a Partner in RubinBrown’s Consulting Services Group. He has over 20 years of experience in ERP, change management and business process transformation working across manufacturing and distribution and healthcare industries.

Jenna Matthias is a Partner in RubinBrown’s Assurance Group. Her focus is providing audit services for clients primarily within the real estate industry with specialization in low-income housing tax credits and HUD engagement.

Jim McMahon is a Partner in RubinBrown’s Consulting Services Group with over thirty years of professional experience in areas ranging from Supply Chain to IT Development. He serves clients with a blend of supply chain leadership, IT development expertise, and deep experience in ERP implementation.

Katelyn Rattner is a Partner in RubinBrown's Consulting Services Group, bringing expertise to organizations navigating today's complex technology and compliance landscape. She specializes in technology compliance, governance, and advisory services, helping clients strengthen controls, manage risk, and drive operational effectiveness.

John Turcich is a Partner in RubinBrown’s Consulting Services Group with a focus on helping manufacturing and distribution companies improve performance through better systems and processes. He specializes in strategic systems planning, software selection and implementation, and business process optimization.

All promotions were effective June 1, 2026.

RubinBrown is one of the nation’s leading accounting and professional consulting firms with a commitment to building personal relationships and delivering totally satisfied clients. RubinBrown has revenue greater than $250 million with over 1,000 team members in offices across Chicago, Denver, Detroit, Kansas City, Las Vegas, Mumbai (India), Nashville, and St. Louis.

RubinBrown is an independent member of Baker Tilly International, the 9th largest accounting and business advisory network in the world. For more information, visit https://www.rubinbrown.com. 

Published: 07/21/2026

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