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About me

Mr. Portner is a member of the National Top 100 Trial Lawyers.  Time Magazine in fact, recently recognized his achievements.  Mr. Portner has been an attorney licensed to practice in Maryland and Washington, D.C. since 1988. He represents clients in matters of personal injury, including motor vehicle accidents, medical malpractice, workers' compensation, and criminal defense.  Recently, he was recognized by Time Magazine as well as the National Top 100 Trial Lawyers Association. 

As a young attorney, Mr. Portner served as a litigator for one of Baltimore's largest law firms. While there he obtained large automobile accident awards, and worked to obtain a million dollar verdict in a personal injury case from a District of Columbia jury. Shortly after working on his first million dollar case, Mr. Portner left to form the firm of Portner & Shure.

He currently supervises the personal injury and litigation departments of the law firm.  As a result of his vast litigation experience, Mr. Portner does not want others to view Portner & Shure, P.A. as a personal injury firm that just settles cases.  Portner & Shure, because of this mentality, litigates automobile accident, workers' compensation, or medical malpractice cases, every week of the year. Insurance companies know the firms that don't back down.

Mr. Portner has tried and won hundreds of cases against some of the top insurance defense attorneys and prosecutors in both State and Federal Courts.  In each of the last five (5) years he has recovered approximately ten million dollars for his clients, and over fifty million in the last six (6) years.  Recently, he along with attorney, Kevin Ruby obtained awards of one million dollars in three (3) different cases.  It is a fact that most injury attorneys do not obtain a single million dollar award during the course of their careers. As a result of these large injury awards, the Million Dollar Advocates Forum, an organization that recognizes the top trial lawyers in America, announced that Jonathan Portner is a certified member. This organization comprises the most prestigious group of trial lawyers in the United States, and fewer than 1% of U.S. lawyers are eligible to become members.

Mr. Portner has dedicated a considerable amount of firm resources to help non-english speaking clients stand up to insurance companies.  The firm provides the highest level of experience to Hispanic, Chinese, Korean, Vietnamese, and Japanese accident victims within the Maryland, Virginia, and DC area.  The firm has a staff of over twenty multi-lingual paralegals and a bilingual Chinese/English speaking attorney who work closely with clients.  As a result, no longer are many foreign speaking accident victims frustrated in dealing with insurance companies after an automobile accident.

Mr. Portner dedicates considerable time to all of his endeavors but believes each personal injury or criminal case should be treated as if it's the only case of the firm. He has obtained over $150 million in recoveries because of his attention to detail, and insistence that his staff have constant communication with each client.


Languages spoken: English, Spanish, Korean, Cantonese, Mandarin, Vietnamese

Photos and videos

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Practice areas


  1. Car Accident: 25%
    28 years, 8 thousand cases
  2. Personal Injury: 25%
    28 years, 8 thousand cases
  3. Workers Compensation: 20%
    28 years, 4 thousand cases
  4. Criminal Defense: 20%
    28 years, 2.5 thousand cases
  5. Medical Malpractice: 10%
    28 years, 500 cases



Contingent (25-40%), Free consultation (120 minutes)

Payment types:

Check, Credit card

Attorney endorsements

24 total 

Are you an attorney? Endorse this lawyer

  • John M O'Brien

    A truly excellent attorney well respected in the legal community. I wholeheartedly recommend him to anyone looking for a lawyer who knows the law and truly cares about protecting the rights of his clients and getting them the most favorable result possible.


    John O'Brien Personal injury Attorney
    Relationship: Fellow lawyer in community

  • Michelle Ying Chiu Jiang

    I endorse this lawyer. Mr. Portner is an aggressive litigator who always brings his passion for winning into the court room. What makes Mr. Portner unique is that his firm handles cases for non-English speaking clients, such as those who only speak Spanish, Chinese, Korean, Japanese, and Vietnamese.


    Michelle Jiang
    Relationship: Worked for lawyer

Contact info

Portner & Shure, P.A. - Columbia

Main Office Location
7226 Lee DeForest Dr., Ste 101
Columbia, MD, 21046

Portner & Shure - Rockville

Satellite Office Only
2275 Research Blvd., Ste 500
Rockville, MD, 20850

Portner & Shure - Vienna

Satellite Office Only
8000 Towers Crescent Drive
Vienna, VA, 22182

Portner & Shure, P.A. - Eastern Shore

Satellite Office Only
1100 Coastal Highway
Ocean City, MD, 21842

Portner & Shure - Owings Mills

Satellite Office Only
10451 Mill Run Cir., Ste. 400
Owings Mills, MD, 21117

Portner & Shure - Baltimore City

Satellite Office Only
400 E. Pratt St., Ste 800
Baltimore, MD, 21202

Portner & Shure - Glen Burnie

Satellite Office Only
7310 Ritchie Highway
Glen Burnie, MD, 21061

Portner & Shure - Greenbelt

Satellite Office Only
6301 Ivy Lane, Ste 700
Greenbelt, MD, 20770

Portner & Shure - Frederick

Satellite Office Only
5235 Westview Dr., Ste 100
Frederick, MD, 21703

Portner & Shure - Annapolis

Satellite Office Only
1910 Towne Centre Blvd., Suite 250
Annapolis, MD, 21401



DCActive 198907/10/2016

Professional misconduct

This lawyer was disciplined by a state licensing authority.

  1. Reprimand
    issued in MD, 2007


    Reprimand means the attorney did something wrong but may still practice law. The State warns the lawyer in hopes that he or she will not repeat the behavior. Details of the infraction are made part of the public record.

    Jonathan’s comment: “In 2007 a couple sought my representation. Both had participated in a home break-in. There was no dispute they committed the crime. They were told to obtain separate counsel. For financial reasons they could not. I therefore agreed to help both. After the guilty plea and looking for a loop hole with immigration, one of the clients indicated she did not have separate counsel. Our conflict advice was not in writing. My sole warning, in over a 25 yr career, is that a waiver must be in writing.”

Avvo contributions
Legal answers
Award nameGrantorDate granted
10.0 RatingAvvo2015
Litigator AwardTrial Lawyers Board of Regents2015
Top ContributorAVVO2014
MemberBest Attorneys of America2014
Lifetime MembershipMulti-Million Dollar Advocates Forum2014
MemberMillion Dollar Advocates Forum2014
Excellence in Personal InjuryTime Magazine2013
IGCX Platinum Seal - Outstanding Customer ServiceInteractions Group2013
Top ContributorAVVO2013
Featured Attorney for Criminal DefenseAVVO2013
Featured Attorney for Personal InjuryAVVO2013
Client's ChoiceAVVO2013
Top ContributorAVVO2012
Featured Attorney for Criminal DefenseAVVO2012
Featured Attorney for Personal InjuryAVVO2012
Client's ChoiceAVVO2012
University of Baltimore Law ReviewEditor1988
University of BaltimoreCum Laude1988
Work experience
TitleCompany nameDuration
PartnerPortner & Shure, P.A.1993 - Present
AssociateGordon Feinblatt, LLC1989 - 1993
ClerkMaryland Court Of Special Appeals Chief Judge Gilbert1988 - 1989
Association namePosition nameDuration
Motor Vehicle Trial Lawyers AssociationMember2014 - Present
The National Top 100 Trial LawyersLifetime Member2013 - Present
National Association of Criminal Defense LawyersMember2012 - Present
Howard County Bar AssociationMember2012 - Present
MantaMember2011 - Present
Million Dollar Advocates ForumLifetime Member2011 - Present
National College of DUI DefenseMember2011 - Present
District of Columbia BarMember1989 - Present
Maryland State Bar AssociationMember1988 - Present
American Association for JusticeMember1988 - Present
Maryland Association for JusticeMember1988 - Present
United States District Court for the District of MarylandMember1988 - Present
District of Columbia Bar, Young Lawyers SectionChair1992 - 1992
Legal cases
Case nameOutcome
Pedestrian killed by automobileSettled for $1,000,000.00
Auto Accident Resulting in a FatalitySettled for $1,000,000.00
Wrongful Death of Minor ChildSettled for $990,000.00
See all legal cases 
Publication nameTitleDate
The National Trial Lawyers$1M Settlement for Motorcycle Rider Hit by Truck that Ran Red Light2014
FindLawPersonal Injury Lawyers Celebrate the Chinese American Chamber of Commerce2014
PR WebMaryland Car Personal Injury Attorney, Jonathan Portner, offers Free Case Recovery Evaluation2014
The Epoch TimesTen Top Things the Chinese Speaking Accident Client Must Immediately Be Aware Of2013
Miju Korean NewspaperHow to Best Handle an Accident Claim for the Korean Speaking Client2012
Korean Daily NewspaperTen Things MD Koren Speaking Accident Clients Must Know2012
Top Ten Questions a Maryland Workers' Compensation Attorney AnswersFinding the Best Workers' Compensation Lawyer for your Case2012
Maryland Car Accident BlogWhat Makes Portner & Shure Better Than Other Personal Injury Attorneys In Howard County2012
ROI NewsletterMarketing Techniques2012
World Journal NewspaperPersonal Injury Issues for Chinese Speaking Accident Victims2012
Am Jur Proof of Facts by Bancroft Whitney Co.Proof of Sick Building Syndrome1993
A Guide to Toxic TortsChapter on Indoor Air Pollution1992
School nameMajorDegreeGraduated
University of Baltimore School of LawLawJD - Juris Doctor1988
Franklin and Marshall CollegePolitical ScienceBA - Bachelor of Arts1984
Speaking engagements
Conference nameTitleDate
Howard County Lecture Series, Part IDeportation Issues in your Howard County, MD Criminal Case2013
Calvery Chinese Community ChurchIssues That Affect Chinese Accident Victims2013
Verano ZolIssues Affecting Spanish Speaking Accident Victims2012
Panel DiscussionMarylands new dog bite law2012
Car Accident Cases LitigationProving Damages in Maryland Car Accident Cases2012
Verano ZolIssues Affecting Spanish Speaking Accident Victims2011