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About me

I am a partner in the Philadelphia office of Willig, Williams & Davidson. I represent  unions and working people in a wide range of labor and employment matters arising under the National Labor Relations Act, state and federal statutes governing collective bargaining, union representation, wage and hour laws and employment discrimination.  I handles all aspects of litigation, arbitration and collective bargaining for his clients, regularly appearing before state and federal courts, administrative tribunals and labor arbitrators.


I find assisting working individuals with their legal needs extremely gratifying. I have tried hundreds of arbitration cases and have won numerous arbitration awards reinstating employees to their jobs after they were unjustly terminated, winning contract cases, and other issues.  I h ave successfully appealed a Pennsylvania Commonwealth Court decision regarding an arbitrator’s authority to interpret the just cause provision of a collective bargaining agreement, resulting in an important win for the union before the Pennsylvania Supreme Court.


My professional experience also includes appearing before the National Labor Relations Board (NLRB), the Equal Employment Opportunity Commission (EEOC), the Pennsylvania Human Relations Commission and other tribunals on behalf of individuals and unions; negotiating collective bargaining agreements; litigating matters such as Fair Labor Standard Act and Title VII disputes; and advising clients regarding ADA, FMLA, Title VII, contract interpretation and other issues.


To further enhance his skills as a labor and employment practitioner, I earned a LL.M. from Georgetown University Law Center in 1997, where I received the Thomas Bradbury Chetwood Prize for the most distinguished academic performance in my graduating class. I was also honored as an outstanding student of practice and procedure before the NLRB. As a law student at California Western School of Law, I was a staff writer and editor for the California Western Law Review and a member of the Traynor Moot Court Team. Prior to beginning my legal career, I was a reporter and editor for The Forward, a weekly newspaper published in New York. Since that time, I has been published in The Washington Times, The New York Times, and Metropolitan Corporate Counsel, among others.


Practice areas


  1. Employment / Labor: 100%

Attorney endorsements

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  • Charles Weiner

    I endorse this lawyer. Mark is a leading advocate on behalf of employees. He demonstrates a broad base of knowledge about complex labor, employment and litigation issues.


    Charles Weiner Education Attorney
    Relationship: Other

Contact info

Willig, Williams & Davidson

1845 Walnut Street
24th Floor
Philadelphia, PA, 19103


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Rising StarPhiladelphia Magazine2006
Work experience
TitleCompany nameDuration
AssociateHarmon and Davies2001 - 2003
AssociateKlett Rooney Lieber & Schorling1999 - 2001
AssociateReed Smith Shaw & McClay1998 - 1999
AssociateSpear Wilderman Borish Endy & Runckel1997 - 1998
Association namePosition nameDuration
American Bar AssociationMember1997 - Present
State Bar of CaliforniaMember1997 - Present
Pennsylvania Bar AssociationMember1997 - Present
New Jersey State Bar AssociationAffiliate Member1997 - Present
Legal cases
Case nameOutcome
Gross BusWin
See all legal cases 
Publication nameTitleDate
Legal IntelligencerNLRB's New Rules for Processing Union Elections2012
The Legal IntelligencerWhither the Employee Free Choice Act?2011
BNA publicationsPractice and Procedure Before the National Labor Relations Board (Chapter Editor)2008
Metropolitan Corporate CounselLegal Tools in the Challenge of Retaining and Atracting Employees for Start Ups,2001
School nameMajorDegreeGraduated
Georgetown University Law CenterLabor LawLL.M - Master of Laws1997
California Western School of LawLawJD - Juris Doctor1995
New York University School of LawEnglishMA - Masters1991
San Diego State UniversityComparative LiteratureBA - Bachelor of Arts1989
Speaking engagements
Conference nameTitleDate
Pennsylvania Bar InstituteEmployee Privacy and Surveillance2008