About
Jonathan N. Portner is President and Managing Partner of Portner & Shure, P.A. He represents clients in criminal defense, personal injury, motor vehicle accidents, medical malpractice, workers’ compensation, and drug and medical device injury matters across Maryland, Virginia, and D.C.
Jonathan graduated cum laude from the University of Baltimore Law School. He also served as an associate editor of the Law Review. After law school, he clerked for Chief Judge Gilbert of the Maryland Court of Special Appeals before working as a litigator at Gordon, Feinblatt.
Jonathan supervises seven fully staffed offices, more than fifty staff members, and ten lawyers. Each month, he helps secure millions of dollars in settlements and trial awards. His firm has recovered more than $400 million while handling injury, workers’ compensation, malpractice, and criminal defense cases.
Jonathan has obtained major results, including settlements of $2.15 million, $900,000, $750,000, and $450,000 in serious accident and wrongful death matters. He has also tried or resolved thousands of cases against insurance defense attorneys and prosecutors in state and federal courts.
Jonathan has received many honors, including Multi-Million Dollar Advocates Forum, Million Dollar Advocates Forum, AVVO 10.0 Rating, Platinum Seal Award, Top 100 Trial Award, and American Institute of Criminal Law Attorneys 2019 10 Best Criminal Law Attorneys for Client Satisfaction.
Jonathan is admitted to practice in Maryland, the District of Columbia, and Virginia. His practice areas include personal injury, auto accident, workers’ compensation, medical malpractice, and criminal defense. He is also a member of groups focused on justice, trial law, and DUI defense.
Jonathan N. Portner brings strong litigation experience, careful preparation, and an aggressive but fair approach to each case. He focuses on client satisfaction, clear results, and detailed case work. His team is prepared to stand up to insurance companies and prosecutors for clients.
Law Office Affiliations
- President, Portner & Shure, P.A.
- Member, American Association for Justice
- Member, Maryland Association for Justice
- Member, National College of DUI Defense
- Member, National Association of Criminal Defense Lawyers
- Member, Maryland State Bar Association
- Member, Howard County Bar Association
- Member, District of Columbia Bar Association
- Member, Million Dollar Advocates Forum
- Member, Multi-Million Dollar Advocates Forum
Licensed State
- Maryland
- District of Columbia
- Virginia
Education
- University of Baltimore Law School
Juris Doctor (JD)
Awards & Badges





- Assault & Battery
- Drug Crime
- DUI & DWI
- Speeding & Traffic Tickets
- Violent Crime
- Car Accidents
- Medical Malpractice
- Motorcycle Accidents
- Nursing Home Abuse & Neglect
- Products Liability
- Trucking Accidents
- Wrongful Death
- Workers' Compensation




