Search

Our Attorneys

Robert E. Potrzebowski, Jr.
Majority Shareholder/President
RobP@kohnlaw.com

Rob Potrzebowski is the Majority Shareholder and President of the Kohn Law Firm S.C. He attended Marquette University and the University of Wisconsin-Milwaukee, where he received his Bachelor of Arts in Economics. Mr. Potrzebowski received his J.D., cum laude, from the University of Wisconsin Law School.

As a member of the National Association of Retail Collection Attorneys, Mr. Potrzebowski previously served on its Education and State Government Affairs committees. He was also a charter member of the National Association of Subrogation Professionals, as well as a founding member of the Wisconsin Creditor's Rights Association, having served on the latter association's original Board of Directors and currently serving as its Treasurer.

Mr. Potrzebowski has spoken before many local and national associations, including those referenced above, as well as the Wisconsin Government Finance Officers Association and the Paralegal Association of Wisconsin. He has also served as an instructor for Wisconsin's Municipal Clerks and Treasurers Institute.

Top of page

Matthew J. Richburg
Managing Shareholder
MattR@kohnlaw.com

Matt Richburg is the firm's Managing Shareholder. Mr. Richburg attended the University of Wisconsin-Whitewater, where he obtained a Bachelor of Science in Political Science and Public Relations. He received his J.D. from the Thomas M. Cooley Law School.

Mr. Richburg is a member of the National Association of Retail Collection Attorneys, currently serving on its State Government Affairs Committee. He is the President of the Wisconsin Creditors' Rights Association and serves on its Board of Directors. Mr. Richburg has lectured on The Wisconsin Consumer Act and on various retail and commercial collection topics.  He is licensed to practice in Wisconsin and Illinois.

Top of page

David A. Ambrosh
Shareholder
DaveA@kohnlaw.com

David Ambrosh is a shareholder and the firm's Supervising Compliance Attorney. In addition to ensuring that the firm remains compliant with all legal and client requirements, Mr. Ambrosh also handles complex litigation, creditors' defense and appellate work. He is a graduate of Ripon College where he earned a B.A. in Psychology. Mr. Ambrosh received his law degree from Marquette University Law School in 2001.

In 2006, Mr. Ambrosh was featured in the Wisconsin edition of Super Lawyers Magazine as a Rising Star in the area of Creditor/Debtor Rights, and has both written and lectured on legal topics relating to debt collection. He is admitted to the bars of Wisconsin and Illinois, the U.S. District Courts for the Eastern and Western Districts of Wisconsin and the Northern District of Illinois, as well as the U.S. Court of Appeals, Seventh Circuit.

Top of page

Jason D. Hermersmann
Shareholder
JasonH@kohnlaw.com

Jason Hermersmann is a shareholder and the firm's Litigation Manager. He also oversees the subrogation and tort related collections and litigation at the firm. He earned his undergraduate degree in Criminal Justice at the University of Wisconsin-Milwaukee and his J.D. at the Marquette University Law School.

Mr. Hermersmann is admitted to the U. S. District Court, both the Eastern and Western Districts of Wisconsin, as well as the U.S. Court of Appeals, Seventh Circuit. He is also a member of the National Association of Subrogation Professionals ("NASP"). He has presented numerous times at the NASP's Wisconsin Chapter Meetings on various topics involving bankruptcy, FDCPA, automobile and medical payments subrogation, negotiation tactics and post-judgment collections.

Top of page

Joseph R. Johnson
Shareholder
JosephJ@kohnlaw.com

Joe Johnson is a shareholder and the firm's Supervising Attorney of Consumer Litigation. In addition to his supervisory duties, Mr. Johnson is the lead litigation attorney for the City of Milwaukee municipal tax claims. He also handles other various commercial and retail matters. Mr. Johnson received both his Bachelor of Science in History as well as his J.D. from the University of Wisconsin-Madison.

Top of page

Maria Lewis
Shareholder
MariaL@kohnlaw.com

Maria Lewis is a shareholder and the firm's Compliance Manager. She manages the firm's new claim intake process, internal auditing functions, and client requests and reporting requirements. Along with the firm's compliance attorneys, Ms. Lewis works to ensure that the firm's practices meet strict procedural, legal, and ethical standards. She previously handled retail and medical litigation for the firm, as well as post-judgment collection matters.

Ms. Lewis is a graduate of the University of Wisconsin-Green Bay, having received a Bachelor of Arts degree in Social Change & Development with an emphasis on Law & Justice Studies. Ms. Lewis obtained her J.D. from the Hamline University School of Law.

Top of page

Jennifer Anderson
Attorney
JenniferA@kohnlaw.com

Jennifer Anderson concentrates her practice in retail litigation, subrogation, and other tort based litigation. She received her Bachelor of Science in Criminal Justice and Communication at Carroll College and received her law degree from the University of Wisconsin Law School. Attorney Anderson is admitted to the U. S. District Court, in both the Eastern and Western Districts of Wisconsin. She brought nine years of collection and litigation experience to Kohn Law Firm, having previously worked in another law firm concentrating her practice in debt collection litigation.

Top of page

Nicholas Smith
Attorney
NicholasS@kohnlaw.com

Nicholas Smith concentrates his practice in post-judgment collection matters. He attended the University of Wisconsin-Whitewater where he received a bachelor's degree in Integrated Science-Business and was a 4-year member of the Warhawk basketball team. Mr. Smith received his law degree from the DePaul University College of Law. Attorney Smith has seven years of experience representing clients in all aspects of debt collection litigation and post-judgment remedies. Mr. Smith is admitted to the U.S. District Court, in both the Eastern District of Wisconsin and Northern District of Illinois.

Top of page

Ellen French
Attorney
EllenF@kohnlaw.com

Ellen French serves as the firm's Compliance Attorney and works to ensure that the firm meets the highest of client and legal standards. Prior to becoming the firm's Compliance Attorney, Ms. French handled post-judgment collection matters for the firm. She attended Lawrence University in Appleton, Wisconsin where she earned her Bachelor of Arts degree in Economics and was a 3-year member of the Lawrence University Vikings women's fastpitch softball team. Ms. French earned her law degree from Marquette University Law School in Milwaukee, Wisconsin. Ms. French also holds a Masters of Taxation degree from the University of Wisconsin-Milwaukee.

Top of page

Tyler Helsel
Attorney
TylerH@kohnlaw.com

Tyler Helsel concentrates his practice in litigation. Mr. Helsel received his Bachelor of Science degree in Political Science from Lake Superior State University in Sault Ste. Marie, Michigan. He obtained his J.D. from Marquette University Law School. Prior to joining Kohn Law Firm, Mr. Helsel assisted in prosecution in the municipal court of the Village of Menomonee Falls.

Top of page

Kirk Emick
Attorney
KirkE@kohnlaw.com

Kirk Emick concentrates his practice in post-judgment collection matters. Mr. Emick attended Iowa State University where he earned a Bachelor of Science degree in Exercise Science with an emphasis in Athletic Training. He then went on to receive a Master's Degree in Public Administration from Drake University in Des Moines, Iowa. Mr. Emick obtained his J.D. from Marquette University Law School in 2016, while also earning a Sports Law Certificate from the National Sports Law Institute. During law school, he was a member of the Marquette Sports Law Review and also competed in the National Baseball Arbitration Competition.

Prior to law school, Mr. Emick worked in collegiate athletics as an athletic trainer at Drake University and Ole Miss (University of Mississippi).

Top of page

Josie Qiu
Attorney
JosieQ@kohnlaw.com

Josie Qiu concentrates her practice in post-judgment collection matters. Ms. Qiu attended Queen's University in Kingston, Canada where she earned a Bachelor's of Arts in Economics. She obtained her J.D. from Marquette University Law School in 2017. During law school, Ms. Qiu was a semi-finalist in the Albert R. Mugel National Tax Moot Court Competition. Prior to joining Kohn Law Firm, Ms. Qiu clerked at a consumer bankruptcy firm.

Top of page

Aaron Birnbaum
Attorney
AaronB@kohnlaw.com

Aaron Birnbaum concentrates his practice in post-judgment collection matters. Mr. Birnbaum attended University Wisconsin-Madison where he earned a Bachelor of Arts degree in Political Science. He then obtained his J.D. from Marquette University Law School in 2004. Prior to joining Kohn Law Firm, Mr. Birnbaum practiced for thirteen years in employment litigation. Mr. Birnbaum has also been committed to the Wisconsin Mock Trial program, participating in high school and earning an All American award in college while continuing to volunteer throughout his career. Mr. Birnbaum is admitted to the U.S. District Court, in both the Eastern and Western Districts of Wisconsin.

Top of page

Zachary Spaciel
Attorney
ZacharyS@kohnlaw.com

Zachary Spaciel concentrates his practice on both consumer litigation and post-judgment collection matters. Mr. Spaciel attended Ripon College where he earned a Bachelor of Arts degree in Politics and Government emphasizing in National Security, along with History. He then obtained his law degree from the University of Wisconsin Law School in 2017. Prior to joining Kohn Law Firm, Mr. Spaciel worked in the field of medical rehabilitation.

Top of page

Sade Ojediran
Attorney
SadeO@kohnlaw.com

Sade Ojediran concentrates her practice in both consumer litigation and post-judgment collection matters. Ms. Ojediran attended the University of Illinois at Urbana-Champaign, earning a Bachelor of Arts degree in Political Science. She then obtained her law degree from the University of Illinois College of Law in 2014. During law school, Ms. Ojediran served as the President of her school's Black Law Student Association. Ms. Ojediran also won "Best Petitioner Brief" as a semi-finalist in the Regional Frederick Douglass Moot Court Competition. Prior to joining Kohn Law Firm, Ms. Ojediran worked at another law firm concentrating her practice in debt collection litigation.

Top of page

Robert W. Kohn
Retired

Bob Kohn is the founder of the Kohn Law Firm S.C. He is retired from active practice in Wisconsin and currently serves as a mediator in California from his Santa Barbara office.

Mr. Kohn attended Marquette University and received his B.S. and J.D. degrees from the University of Wisconsin at Madison. He has been an active member of many local and national debt collection associations, including the National Association of Retail Collection Attorneys, where he served on that group's Board of Directors.

Mr. Kohn has been a contributor to numerous periodicals, has authored books on Wisconsin collection law and is a frequent lecturer on debt collection topics for various professional associations. In addition, he has lectured at the University of Wisconsin Law School and the Marquette University Dental School. He is also a mediator and arbitrator, as certified by the University of Wisconsin-Milwaukee.

The firm recognized his 50 years of practice in 2010.

Top of page