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os mirza law

-  Criminal Defense   -  

-  Civil Litigation  - 

-  Family - 



Criminal Defense

An experienced criminal defense attorney knows how to prove your innocence but also how to hold the government accountable under protections afforded by Federal and State Constitutions. If you are alleged to have committed a crime or charged with a violation of law, our firm can defend you or negotiate a better outcome.  It is critical to speak with us as soon as possible. Early action gives us the time to fight for you. We also remind clients not to take action on their own. Do not speak to the police without your lawyer present. Even statements that seem harmless could lead to trouble, so it’s best to seek the experienced guidance we provide before you take any legal action. Read More.


Bankruptcy can provide a simple and effective solution to your financial problems. Our firm can help you manage personal or business debts that you are unable to pay. Bankruptcy laws allow people and businesses to (1) get a “fresh start” by relieving most debts; and (2) repay the money owed to all creditors as fairly as possible. When you file for bankruptcy protection, most other legal actions against you are put on hold. Read More.

Civil Litigation

If you have a legal dispute and wish to pursue a lawsuit (i.e., restraining orders, custody, divorce, contract disputes, etc.), our firm can help you handle the litigation process. Our firm can also help you decide whether your case is appropriate for a lawsuit, or if it might be better handled through a mediation or arbitration process. Read More.

Family Law

Our firm can help you with family-related legal issues. We aim to understand the specific circumstances of your family situation in order to help you achieve attainable goals. Family matters are often contentious which can cause a lot of stress. We strive to achieve your best outcome by finding creative solutions to difficult problems. Our firm handles prenuptial agreements, divorce, collaborative divorce,  legal separation, annulment, maintenance, property settlements, adoption, child support, custody, placement, paternity and post-judgment modifications. All family matters are offered free consultations.

Intellectual Property

If you are creative person, such as an artist, author, software developer, inventor, or business owner, an intellectual property lawyer can protect your rights to those innovations. Patents, trademarks, copyrights and trade secrets are handled by our registered patent attorney  who can assist with prosecuting  or negotiating your rights to intellectual property.  Read More.



A Mission to Advocate for Our Clients


When you are in need of legal services, whether due to injury resulting from someone's negligence, mounting a criminal defense, protection from harassment, or  preserving rights to an inventive idea, you need to know your legal options. At OS MIRZA LAW, LLC you can expect the kind of personal commitment to your success not usually found at bigger law firms.


OS MIRZA LAW, LLC targets your specific goals with a dedication to the best outcome.   We advocate for our clients by partnering with them to help reach those goals. Our firm keeps the lines of communication open, pricing arrangements clear, and case progress honest. We treat our clients and their cases with the respect they deserve. 

Legal issues can be overwhelming. We aim to reduce the impact of your stress by handling the paper work, filings, scheduling, briefings, negotiations and court proceedings. OS MIRZA LAW, LLC is here to advise you on your rights while also guiding you through the legal process. We are on a mission to deliver the best legal results on your behalf. 



Osman A. Mirza

Managing Attorney

Osman A. Mirza received his undergraduate degree from the University of Illinois at Urbana-Champaign. He also holds a masters in science in cellular and molecular physiology from Loyola University Chicago. He went on to obtain his juris doctorate from  Valparaiso University School of Law where he was awarded for  dean’s list honors, moot court advocacy, and legal writing. 


Attorney Mirza is licensed to practice law in Illinois, Wisconsin and Federal Courts. His practice areas include primarily criminal defense, family law, personal injury and civil litigation. He is also registered  with the United States Patent & Trademark Office and can help clients seeking to secure intellectual property rights in patents, copyrights, and trademarks.


  • Milwaukee Bar Association, LRIS Committee Member

  • Eastern District of Wisconsin Bar Association, Member

  • Illinois State Bar Association, Member

  • Chicago Bar Association, Member

  • Wisconsin Criminal Defense Lawyers, Member

  • Wisconsin Entertainment Lawyer's Association, Member




  • Wisconsin Circuit Court

  • Supreme Court of Wisconsin



  • Illinois Circuit Court

  • Illinois Supreme Court


United States Patent & Trademark Office

  • Patent and Trademark Appeal Board


United States District Courts

  • Northern District of Illinois

  • Eastern District of Wisconsin 




757 N. Broadway

Suite 300

Milwaukee, Wisconsin 53202

Tel: 414-553-9266

Fax: 414-296-8433

For any general inquiries, please fill in the following contact form:

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