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Hall & Romkema, PLC to join Maner Costerisan, January 1, 2023

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Lansing, MI — The accounting firms of Maner Costerisan and Hall & Romkema, PLC recently announced a merger. Beginning January 1, 2023, Hall & Romkema, PLC will be recognized as Maner Costerisan. 

“We view this merger as a significant benefit for clients of both firms and our collective team members,” said Trey Williams, CPA, President of Maner Costerisan. “We recognized right away there was a very apparent cultural and strategic fit. Combining our resources and knowledge base is a tremendous win for our clients.” 

Joe Romkema, CPA, managing member of Hall & Romkema PLC, echoed the sentiment, “Our top priorities have always been to provide the best service possible to our clients and to value our team members, many of whom are like family. We feel confident this merger enhances our ability to fulfill our objectives and provides us the opportunity to more effectively serve as a trusted advisor to our clients.” 

Hall & Romkema, PLC. was established in East Lansing, Michigan, in 1991. The firm provides accounting, financial and wealth management services to individuals and businesses in a variety of industries.   

The merged practices will retain the name Maner Costerisan, and offices will be located in the current Maner Costerisan headquarters at 2425 East Grand River Ave., Suite 1, Lansing, MI 48912. The team at Maner Costerisan can be contacted at (517) 323-7500. 


About Maner Costerisan 

Maner Costerisan is a full-service public accounting, technology, wealth management, and business consulting firm located in Lansing and Grand Rapids, Michigan. Based on annual revenue, it is currently the sixth-largest accounting firm headquartered in Michigan. Founded in 1906, Maner Costerisan employs more than 150 professionals and has experienced consistent growth for over 20 years.

Accounting, audit, and assurance, consulting, tax, technology, and wealth management services are provided to clients in a variety of industries, including affordable housing, cannabis, construction, education, government, healthcare, high net worth individuals, manufacturing, nonprofit, small and mid-sized businesses, and telecommunications. Maner Costerisan was recognized as one of Crain’s Detroit’s 2022 Cool Places to Work. The prestigious annual list ranked Maner No. 13 among medium-sized businesses statewide and No. 40 overall. In addition, Maner has been ranked one of the Best Firms to Work For by Accounting Today for seven consecutive years. 

For information about Maner Costerisan, visit or call 517.323.7500.  


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