Federal Criminal Defense Lawyer —
Philadelphia, Pennsylvania
The vast resources of the federal government, the complexity of the justice system as a whole, the seriousness of the potential consequences – these are daunting challenges, to say the least. However, as a criminal defendant or as the subject of a federal investigation, this is the reality of what you are facing.
That said – no matter what the charges you’re under investigation are for, no matter what you’ve already been charged with, it is important for you to know two things: Number one, there is always a defense. And number two, the impact an experienced attorney can have on the outcome of your case cannot be overstated.
Our Attorney and Practice
Mark S. Greenberg, Esquire, is an experienced Philadelphia criminal defense attorney and a partner in the Center City law firm of LaCheen, Wittels & Greenberg, LLP. Over the course of his 28-year career, Mr. Greenberg has provided sound legal advice and effective defense representation on behalf of thousands of clients, and in both state and federal criminal courts in Pennsylvania, New Jersey and Delaware.
Today, Mr. Greenberg's practice focuses exclusively on representing clients who have been charged with or who are under investigation for federal offenses, including federal drug charges firearms violations, and “white collar crimes”. He provides skilled legal representation at trial and for appellate and post-conviction matters, including federal sentencing, as well.
Mr. Greenberg has established a record of success in all of these practice areas and a strong reputation for providing his clients with the professional effort and vigorous defense representation they deserve.
Our Commitment to You
We understand the gravity of your situation and are committed to providing you with the same type of individual attention, open communication, accessibility and responsiveness we would expect if our circumstances were reversed.
Because of that, Mr. Greenberg limits the number of cases he handles and will make every effort to meet with you directly whenever possible. Here, the decisions will be yours to make. You will be free to take as active a role in your own defense as you want. You will have Mr. Greenberg’s personal cell phone number. You will not be kept in the dark and will almost always be able to get prompt responses to your calls or e-mails.
Contact Information
To learn more about your rights or to schedule an initial, professional consultation – contact our firm online or call federal criminal defense attorney Mark S. Greenberg directly at 877-297-6972 or 267-439-4879.






