Free Consultation
$0 first 120 minutes
also known as Heather J. Mattes, Heather Mattes
Heather J. Mattes is an experienced criminal lawyer. She was born in Philadelphia, Pennsylvania and has lived and practiced here throughout her career. Ms. Mattes grew up in Delaware County where she attended public school and participated in the music program graduating as a national honor society member. In 2003, she was inducted into Sun Valley’s “Wall of Fame.”
Ms. Mattes attended The Pennsylvania State University where she graduated Summa Cum Laude with a degree in Communications Studies emphasizing ethics and philosophy. She graduated from the Villanova University School of Law and began her early practice as an Assistant Public Defender in West Chester, Pennsylvania for three years defending indigent clients at all levels of prosecution and in the state appellate courts.
For sixteen years, Ms. Mattes was an Assistant District Attorney in Delaware County, Pennsylvania where she tried misdemeanor and felony cases from driving under the influence to capital homicide as well as sexual assault and other special victim matters. She mentored and supervised other attorneys during her tenure.
Since 2005, Ms. Mattes has limited her practice to criminal defense in the state and federal courts. She is a member of the federal Criminal Justice Panel, the Pennsylvania Bar Association as well as the National Criminal Defense Lawyers. Ms. Mattes was a member of the Board of Pennsylvania Criminal Defense Lawyers for six years and remains active with the organization. She received commendations in 2014 and 2016 for her work with PACDL. In 2019 and 2020, Heather was the President of the Delaware County Chapter of PACDL.
1
Practice Area
42 years
Free Consultation
$0 first 120 minutes
Quickly connect with top attorneys through our legal directory to get help with your legal issue.
Chat with a live agent who can match you with the right attorney for your legal needs.
Chat withState: Pennsylvania
Acquired: 1984
No misconduct found
105 South High Street, Suite 2A, West Chester, PA, 19382
12 Client Reviews
Showing 1 - 2 of 2 reviews | Trustworthiness
Posted by Maria | October 09, 2025 | Criminal Defense
Beware read contract!!! She changes to "FLAT FEE after verbally saying RETAINER" IMO, HER REAL CAREER IS TAKING THE EASY WAY OUT
*HEATHER MATES. IN MY OPINION. HAS NO HONOR, INTEGRITY OR DO DILIGENCE TO HER JUDICIARY RESPONSIBLITIES as a criminal attorney. I could write a book on how much she butchered up my case but I'm just going to give you some bullet points. * I had a win-win case. The judge said in so many words that i...
Posted by anonymous | January 28, 2017 | Hired Attorney | Criminal Defense
Do not recommend
I would not recommend this attorney to defend you. She is a former Assistant DA. In our case, she was professional and helpful in her office before we paid her $2500 non refundable retainer. She said that she would bill her time at $350/ hour against the retainer. When we arrived in court 1 week late...
It is regrettable this parent of a client misunderstood the conversation prior to the court hearing. The decision to enter a plea belongs to the client, not counsel. The review fails to acknowledge the attorney's patient efforts to explain the circumstances to him and the client, her advocacy on the client's behalf and the fact Ms. Mattes sought and obtained dismissal of the charges over the Commonwealth's objection. Ms. Mattes takes pride in providing superior service and zealous advocacy to every client and understanding to distraught parents when necessary. She has offered to discuss this matter further with the party privately.
"I'm a lawyer and if I got into trouble, I would hire her. I have known Heather for many years. She is the kind of lawyer that loves her job and takes pride in fighting for justice. She will stand by your side and know the law better than anyone else in the courtroom. In my opinion, she is one of the most talented and compassionate lawyers in the Commonwealth of Pennsylvania."
"Heather is a professional, competent and diligent attorney who is well known in Chester County. Highly recommended"
"I've known Heather Mattes to be a very well-prepared, knowledgeable and caring lawyer. She takes pride in doing good work. I highly recommend her!"
Criminal defense lawyer
Criminal defense lawyer
2016
President's and Directors' Commendation, Pennsylvania Criminal Defense Association
2004
Annual Award, Bikers Against Child abuse
2006 - Present
Adjunct Professor, Drexel University College of Medicine
2006 - Present
Principal, Law Offices of Heather J. Mattes
1989 - 2005
Assistant District Attorney, Delaware County District Attorney's Office
1985 - 1988
Assistant Public Defender, Chester County Public Defender's Office
2012 - Present
National Association of Criminal Defense Lawyers
2010 - Present
Homeowner's AssociationSecretary
2010 - Present
Delaware County Bar Association
2006 - Present
Pennsylvania Bar Association
2006 - Present
Chester County Bar Association
2019 - 2021
Delaware County Association of Criminal Defense LaPresident
2012 - 2020
Pennsylvania Association of Criminal Defense LawyersBoard of Directors
2010 - 2021
American Bar Association
1984
JD - Juris Doctor
1981
Bachelor of Arts
2015
Women In The Law
2016
English
Legal Answers