The Firm at Work

Casselman & Henderson, P.C. is a law firm serving clients all over Michigan’s Upper Peninsula. The operating philosophy of our office is simple: we maintain a relatively small caseload, allowing our attorneys and staff to devote individualized attention to each case. Our approach leads to better results and the most effective advertising there is: a hard-earned, excellent reputation in the legal community.
We encourage you to “check our references” – just ask around!  Indeed, the hallmark of our firm is the quality of our representation. We get to know our clients well and work hard to ensure their needs are met. Phone calls are returned promptly, and we ensure that clients are kept informed of the status of their cases and understand the legal process. The relatively small caseload we carry allows our attorneys and staff to devote the necessary time to ensure that every viable option is explored in the preparation of each client’s case. Our attention to detail means that, whether you choose to settle your case or proceed to trial, you’ll know that no stone was unturned in the preparation and presentation of your case. To that end, we provide high-quality legal services with integrity, professionalism and respect for our clients, colleagues and community.

Our Core Values


We are one of the most sought-after providers of legal services in Michigan’s Upper Peninsula. Our attorneys are dedicated to ongoing continuing legal education to continually improve our legal skills.


We maintain an uncompromising commitment to the highest standards of professional ethics and integrity. We treat our clients, colleagues and the judiciary with the utmost respect.


We aim to exceed the expectations of our clients in all aspects of their legal representation. We are committed to being accessible, efficient, responsive and technologically sophisticated.

We are a client-focused firm that is committed to effective representation and communication. For personal service and quality representation, please contact us today.

The Firm

Casselman & Henderson, P.C. is an Upper Peninsula law firm located in Marquette, Michigan. Sarah E. Henderson actively takes on cases. Further, Thomas P. Casselman, retired, associates with the firm.


Casselman & Henderson, P.C. specializes in criminal defense and family law.


While our office is in Marquette, Michigan, our attorney and staff serve the entire Upper Peninsula. We have represented clients in every county in the U.P.