You Need An Experienced Attorney On Your Side

It is crucial that you consult with an experienced Fairfax and Northern Virginia lawyer who understands and can explain the legal landscape unique to your situation and location. Acting fast in this process may help secure a better outcome and will assure a high-level understanding of how your legal matter will proceed through the judicial system.

Jennifer Leffler, Jonathan Phillips and Mary Herbert from Leffler Phillips PLC, Fairfax Defense Attorneys

The Best, Most Experienced Trial Lawyers in Fairfax and Northern Virginia

We are routinely named among the best lawyers in Northern Virginia and the DC metropolitan area in several practice areas, including criminal law and personal injury. We practice in all Virginia courts and we have extensive experience representing our clients across multiple areas. We provide quality legal counsel to individuals, corporations, physicians and other health care providers, judges, lawyers, and law firms.

Practice Areas


We represent clients for federal, state, and local criminal matters. Clients accused of criminal conduct need prompt action, an understanding of their legal rights, and strong representation to help them deal with law enforcement and prosecutors.

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Juvenile & Family

Whether your legal matter is personal or involves a spouse, sibling, or child, our clients know their juvenile and domestic relations issues will receive the time and effort necessary to see them through to successful resolution.

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Protective Orders

Protective Orders should be sought and issued in cases where an actual threat exists. We represent both petitioners and respondents in protective order cases to ensure that these serious court orders are only issued when there is a real threat to an individual’s and/or a family’s safety.

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Personal Injury & Wrongful Death

Clients who have suffered a serious personal injury or have experienced a death in the family understand how important it is to have attorneys to assume the burden of securing compensation. We enable our clients to direct their time and energy to healing while we work diligently on their behalf.

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Business & Employment

Whether our clients have been wrongfully terminated or have become the target of a noncompetition lawsuit, we understand that employment law matters must be resolved as quickly and favorably as possible to preserve our clients’ livelihoods.

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We regularly counsel lawyers, doctors and other professionals when they need assistance in ethical or legal matters. We are always discreet and sensitive to how difficult it is for professionals to reach out for help when they are used to helping others.

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Jennifer Leffler is an exceptional Lawyer. The best Lawyer in Northern Virginia! Let me Start by saying Jennifer WON another case. I had an arrest last year for a DUI. A friend of mine, who had won a case with Jennifer recommended her. I would absolutely recommend Jennifer to any person who may find themselves in a legal situation.

Client Review from Google

Jennifer Leffler is one of the best attorneys I have been represented by personally. She represented me in a protective order hearing in which false allegations were accused against me. I felt very overwhelmed about my case because I felt in the wrong before it had started but she came into court aggressive and prepared. In which she ended up dismissing both cases filed against me. 10/10 law firm.

Client Review from Google

From the first consultation all the way through my case's closing, Ms. Leffler's legal advice was sound and wholly helpful; she was available, smart and straightforward... [and] resulted in an overall very favorable outcome for me that makes me fully confident in recommending her to those in need of an attorney.

Client Review from

I was facing four serious felony charges in Fairfax County. Mr. Phillips expertise, guidance, and counsel assisted me in obtaining a very favorable outcome. Mr. Phillips was always prepared, organized, and so easy to contact. He helped me understand the court process and literally helped keep me sane through the entire process.

Client Review from

I recently had a civil issue which could have jeopardized my job and livelihood. Needless to say, I needed great legal representation to protect myself and family. As a result of Jonathan Phillips efforts, the verdict turned out in my favor and I was able to put this horrific incident behind me.

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Meet Our Lawyers

Jennifer Leffler

Jennifer Leffler

Jennifer Leffler is an experienced trial lawyer who has tried hundreds of criminal and civil cases in state courts throughout Northern Virginia. She is a former prosecutor, Assistant Commonwealth’s Attorney for Fairfax County. In addition to her defense and prosecutorial experience, Ms. Leffler also served as a judicial law clerk in the Fairfax County Circuit Court. Ms. Leffler routinely handles criminal and traffic matters, protective orders, expungements, personal injury matters, and police investigations. She has been named a Top Lawyer by Washingtonian Magazine, a Rising Star by SuperLawyers, and included in the 2022 Edition of Best Lawyers in Criminal Defense: General Practice and White-Collar. Ms. Leffler’s extraordinary ability to connect with her clients makes her a meaningful and effective advocate. Her enthusiasm, confidence, and extensive experience in the courthouse has led her to develop creative approaches to resolving the most challenging cases. While Ms. Leffler believes in fostering and maintaining amicable relationships with opposing counsel, she also believes that the best defense is a good offense. Outside the office, she enjoys early morning runs and cooking for her family.

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Jonathan L. Phillips

Jonathan L. Phillips

Jonathan Phillips is an experienced trial lawyer who has tried hundreds of criminal and civil cases in state and federal courts throughout Virginia. He is a former prosecutor, Assistant Commonwealth’s Attorney for Fairfax County, and clerical intern to the Honorable Barbara Milano Keenan. Mr. Phillips routinely handles adult and juvenile criminal and traffic matters, police investigations, expungements, professional liability matters, serious personal injury matters, and protective orders. He has been named a Top Lawyer by both Washingtonian and Northern Virginia Magazine, recognized by Virginia Super Lawyers, and included in the 2022 Edition of Best Lawyers in Criminal Defense: General Practice and White-Collar. With his extensive IT background, Mr. Phillips is a unique and adept lawyer, particularly recognized as an industry leader in criminal cases involving computer forensics. His extensive experience, ingenuity, and charisma have gained Mr. Phillips an eminent and well-respected reputation both inside and outside the courtroom. Outside the office, he enjoys making good wine, traveling to new destinations, and seeking out the newest roller coaster.

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Statue of Lady Justice

We Practice in All Virginia Courts

We practice in all Virginia courts in matters related to criminal, civil disputes, personal injury, protective orders and matters involving juveniles. We represent clients in the following counties and cities:

  • Fairfax County
  • Fairfax City
  • Prince William County
  • Loudoun County
  • Arlington County
  • City of Falls Church
  • City of Alexandria
  • Town of Herndon
  • Town of Vienna
  • Federal Courts of Virginia

Contact Us

You should always speak to a lawyer before making any decision that may impact your liberty or finances. Consultations are always free and attorneys at LefflerPhillips will meet with you to discuss your case and provide representation options. You can communicate via telephone, email, or arrange to meet in person at our Fairfax office.

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