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We are thrilled to announce we’re making an exciting change to our practice. Beginning January 1, 2023, the professionals at Hall & Romkema, PLC will join the Maner Costerisan team. We view this merger as a significant benefit for our clients and look forward to a bright future with our new firm. The merged firm will be known as Maner Costerisan.  

Our main office will be located at the following address: 

2425 East Grand River Ave., Suite 1 

Lansing, MI 48912 

Our Continued Direction – Focusing on Client Service 

Our first priority has always been providing our clients with the best services possible. We feel confident that our merger enhances our ability to fulfill this objective. We are excited about the additional resources and knowledge base we will have available to share with our clients. We believe this move will enhance our ability to reach our goals and allow us to more effectively serve as a trusted advisor to our clients.   

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. As an Independent Member of BDO Alliance USA, the firm has full access to the national and worldwide resources of one of the largest accounting and consulting firms in the world. For more information, visit

What Our Merger Means to You 

As we merge our practices, you can count on Maner Costerisan to exceed your expectations by enhancing our ability to provide efficient, timely, and proactive service. Merging with Maner will open the door to a variety of important additional services and expertise to better support you. 

As we look forward, let us reiterate how appreciative we are to have you as a client. We know you have many options for accounting and consulting support these days, and we are thrilled you’ve chosen us to serve as your trusted partner. 

This merger demonstrates our commitment to providing the absolute best service available. 

We welcome the opportunity to provide additional background information on Maner Costerisan and our decision to merge our practices. Please feel free to contact any of us with questions at (517) 323.7500.