Ryan S. MacGillis

Family Law, Estate Law, Civil Litigation

Phone: 414-727-5150

Fax: 414-727-5155

Ryan is a partner at MacGillis Wiemer, LLC and is a trial attorney.  He focuses his practice on Family, Estate Planning, and Civil Litigation cases.  Ryan is a graduate of the Marquette University Law School and received his undergraduate degree in communication from the University of Wisconsin-Milwaukee.  While in law school, Ryan was a judicial intern with the Wisconsin Court of Appeals.


Ryan is also a Judge Advocate General (JAG) in the U.S. Army Reserve.  Ryan has been in the Army for over fifteen years and has achieved the rank of Major.  Ryan currently works as a Deputy Team Chief for a Legal Operations Detachment.


Ryan has represented men and women in family law cases, including paternity, divorce, child support, property division, and post-judgment actions, in several counties throughout Wisconsin.  Ryan also works as a Guardian ad Litem in Milwaukee and Waukesha Counties representing the best interests of the minor child.  Ryan’s work as a Guardian ad Litem provides him with a unique perspective in handling family law cases.  Ryan also has helped a number of service members and their families dealing with the complex issues surrounding military divorces.


For his achievements on behalf of his clients, Super Lawyers has named Ryan a Rising Star in 2013, 2014, 2015, 2016, 2017, and 2018.  Ryan also volunteers with several organizations, including Dry Hootch Volunteer Family Law Clinic.  At Dry Hootch, Ryan provides general legal advice and referrals to veterans and their families. Ryan’s past employment includes an intern position on the Wisconsin Court of Appeals.


Ryan is a life-long resident of Wisconsin.  In his free time, Ryan enjoys fishing, hunting, working in the yard, and spending time with his wife, Leah, and daughters, Annabelle and Naomi.  He also enjoys traveling.  During his time in the Army, Ryan visited several countries in Africa, South and Central America, and Asia.  While in Africa, he taught English and Math to 4th grade students in a rural village.

Bar Admission


State Bar of Wisconsin


Wisconsin Supreme Court


U.S. Eastern District Court of Wisconsin


U.S. Western District Court of Wisconsin



Marquette University Law School, Milwaukee, Wisconsin, J.D.


University of Milwaukee-Wisconsin, Milwaukee, Wisconsin, B.A.


Judge Advocate Officer Basic Course, Charlottesville, Virginia


Areas of Practice


Child custody and visitation

Child support

Collaborative divorce

Property division and divorce

Military Divorce

Guardian ad Litem

Estate Planning


Civil Litigation

Honors & Awards

“Rising Star” by SuperLawyers 2013, 2014, 2015, 2016


Military Outstanding Volunteer Service Medal


Recognized by the State Bar of Wisconsin’s “Pro Bono Honor Roll” for his work with Dryhootch Family Law Clinic


Co-Trainer, Milwaukee County Family Court Mediation Services Annual
Mediation Training, May 15, 2018

Co-Presenter, State Bar Association of Wisconsin 35th Annual Family Law Workshop, “Common Custody and Placement Issues Facing Military Members and Families,” August 2016, Door County, Wisconsin.

Professional Associations and Memberships

U.S. Army Reserve, Captain

Leander J. Foley, Jr. Matrimonial Inn, American Inns of Court, member

Collaborative Family Law Council of Wisconsin, member

Milwaukee County Bar Association, member

Waukesha County Bar Association, member

Washington County Bar Association, member

American Bar Association, member

Pro Bono Activities

ABA Military Pro Bono Project

Modest Means Program

Dry Hootch Family Law Clinic

Marquette’s Public Interest Society, Service members and Veteran’s Legal Assistance of Wisconsin (“SAVLAW”)

Marquette’s Volunteer Legal Clinic

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