Peter J. Jeffrey is a Member of and the Director of Litigation for the law firm of Mahoney & Jeffrey, PLLC – M&J – "The Federal Employee's Law Firm ".

Mr. Jeffrey has over a decade of experience in Federal Sector Labor and Employee relations. Prior to joining the firm of law firm of Mahoney & Mahoney, LLP, predecessor to the current law firm of M&J, from 1998 through 2005, Mr. Jeffrey served as the president of the Council of National Archives and Records Administration Locals, American Federation of Government Employees, AFL-CIO. While union president, Mr. Jeffrey re-negotiated the National Archives master collective bargaining agreement, developed an alternative dispute resolution program for the agency, and represented National Archives' bargaining unit employees in numerous grievances and individual discrimination complaints.

Mr. Jeffrey concentrates his practice in the areas of discrimination, employment, and labor law, primarily representing Federal employees, managers, senior executives, and labor unions in employment and labor law counseling, litigation, mediation, and arbitration. In addition, Mr. Jeffrey provides advice and representation to Federal employees and contractors, as well as military personnel, during all phases of the security clearance process from initial application thru investigation and adjudication to appeal. Mr. Jeffrey's practice frequently involves litigation before such administrative agencies as the U.S. Merit Systems Protection Board (MSPB), the U.S. Equal Employment Opportunity Commission (EEOC), the Office of Compliance (OOC), the Defense Office of Hearings and Appeals (DOHA), and the Federal Labor Relations Authority (FLRA).

Mr. Jeffrey is General Counsel to Council 260 and Local 2703 of the American Federation of Government Employees, AFL-CIO.

Mr. Jeffrey serves as a part-time faculty member at The Catholic University of America, Columbus School of Law, where he teaches Fair Employment Law.

Mr. Jeffrey is licensed to practice law in the District of Columbia and Maryland. Mr. Jeffrey is also a member of the bars of the United States Courts of Appeals for the District of Columbia Circuit, the United States Court of Appeals for the Federal Circuit, and the United States Court of Appeals for the Fourth Circuit.

Mr. Jeffrey is a member of the American Bar Association, the National Employment Lawyers Association, the AFL-CIO's Lawyers Coordinating Committee, the Metropolitan Washington Employment Lawyers Association, the Society of Federal Labor and Employee Relations Professionals, the Maryland State Bar Association, and the District of Columbia Bar.

Mr. Jeffrey earned his law degree (Juris Doctor) from The Catholic University of America, Columbus School of Law, where he graduated magna cum laude. He received his undergraduate degree (Bachelor of Arts – University Scholar) with honors from Xavier University in Cincinnati, Ohio.