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Hello, I am Attorney Mark Kershek. I’ve been practicing criminal law for over 25 years. I have a deep seated commitment to the Constitution and, with that, to protect people’s Constitutional rights. I understand that most people, if not all, have issues. I work hard to address my client’s issues with the hopes of not only representing them, but to making my clients better people. Because of this, I find practicing criminal defense law very rewarding. I have enjoyed success litigating cases through trial, motion hearings and appeals on numerous cases. Most of my practice concentrates in Waukesha and Milwaukee, but I have represented many people throughout the State of Wisconsin. I practice both in State and Federal Court.

I grew up in Brookfield, Wisconsin. I attended high school at Marquette University High School, college at New York University, and law school at Loyola University of Chicago.

My philosophy of practicing law is this: to be an effective lawyer, it should not be about money. Its about loving what you do. Criminal defense law for me is the most rewarding area of law because of the interaction I have with people and the chance to help them. Different Attorneys’ personalities are better suited for different areas of law. For me, the practice of criminal defense law is a natural fit. It’s about the protection of Constitutional Rights and its about helping people becoming better human beings.

If you chose to contact me, I think you will find my rates reasonably priced compared to many attorneys. I have worked hard to keep my overhead low in order to keep my rates reasonable and affordable. I would be happy to review your case with you for free and give you a preliminary assessment of your case.

Thank you,

Mark Kershek



Disorderly Conduct is one of the most commonly charged criminal offenses in Wisconsin.  Everyone is probably guilty of it one time or another in their lives.  Generally, it is defined by conduct which tends to cause a disturbance.  Commonly, people are arrested for this offense if they are unreasonably loud, boisterous, use profanities or become violent.  

Battery Cases.jpg

Battery is the hurting of another without their consent.  It is most commonly charged when two people -- often in a relationship -- have an argument that leads to one pushing or hitting the other causing pain.  Often, it is charged with a Domestic Violence enhancer which can have collateral consequences on a person's right to bear arms.  


OWI, or DUI is the driving while intoxicated.  It can be charged as a misdemeanor or felony depending on factors such as how many prior convictions a person has for it in the past and/or if there were injuries associated with the drunk driving.  In Wisconsin, the penalties keep increasing as time goes on.

Drug Dealing Cases.webp
Drug Dealing Cases

Drug dealing cases are quite common.  There are varying degrees of seriousness to drug dealing cases.  The variables to analyze a drug case is what drug was being sold, how much of the drugs was involved, the prior record of the dealer and many other considerations.  

Sexual Assault Cases.jpg

This is a crime that should never be taken lightly.  It is one of the most serious criminal charges.  There are four degrees of Sexual Assault: 1st through 4th, with the 4th degree sexual assault being a misdemeanor, the other being felonies.  Sexual Registry often comes into play with being convicted of sexual assault.

Drug Possession Cases

Drug possession cases are very common.  Most cases involve the possession of THC.  As time goes on, legal attitudes have subsided about the use of marijuana, but it is still illegal in Wisconsin and some prosecutors vigorously prosecute it.  Possession of other types of drugs tend to involve more serious consequences.  A prosecutor in Milwaukee might take a different stance on the same facts of a case that might occur in Waukesha.

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