PRO
also known as John P. Mahoney
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John P. Mahoney focuses his practice on litigating federal employment law, labor, and national security clearance law cases. He counsels and represents federal employees, contractors, agencies, unions, and employee associations in a wide range of issues, including employment discrimination, EEOC complaints, MSPB appeals, whistleblower retaliation cases, and more. He is a nationally recognized attorney who has earned a Preeminent® Rating from Martindale-Hubbell® and has been selected as a 2017 Top Rated Lawyer in Labor & Employment Law. Mr. Mahoney, who also served as the Vice Chair of and an administrative judge with the Government Accountability Office's (GAO) Personnel Appeals Board (PAB), has an impressive record of success and is known for being able to deliver smart solutions along with caring advocacy.
To learn more about John P. Mahoney, Esq. visit his profile page on the website at:
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Practice Areas
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State: District of Columbia
Acquired: 1994
Lawyer disciplined by state licensing authority in 2016
State: Maryland
Acquired: 1993
Lawyer disciplined by state licensing authority in 2024
Ronald Reagan Building & International Trade Center, 1300 Pennsylvania Ave., NW, Suite 700, Washington, DC, 20004
attorneymahoney.com
Other places you can find John online.
Showing 6 - 10 of 27 reviews | Practice Area Knowledge
Posted by Lorraine | March 02, 2023 | Hired Attorney | Employment & Labor
Thank you
I had almost given up on my EEOC case until I reached out to Attorney Mahoney, and he promptly responded to my consult request at 8 p.m. He thanked me for my service to our country. He said his firm would be honored to represent me. I could not believe it. My discovery was ending in approximately 2...
Posted by Oluseyi | February 02, 2023 | Employment & Labor
Review
Attorney John is very knowledgeable in Federal employees matters. He was able to assess my case.
Posted by anonymous | January 12, 2023 | Hired Attorney | Employment & Labor
JP Mahoney Law Firm. Mr. Matthew Estes
Mr. Matthew Estes was a is an accomplished attorney. He is knowledgeable as a legal counsel on federal labor laws. He was able to guide me through each step of the legal process regarding my case. I especially want to point out that Matthew showed both empathy and sympathy through the entire proc...
Thank you so much for your kind words! We are grateful for the opportunity to represent you.
Posted by Lisa | August 09, 2022 | Hired Attorney | Employment & Labor
Impressive!
Talking with John Mahoney was more impressive than I had imagined it could be. My consultation felt as though I had found the perfect fit for my EEO case and none of the previous consultations I had with other firms felt that way. He is a compassionate professional that knows the law. I learned far m...
Posted by anonymous | February 21, 2022 | Hired Attorney | Employment & Labor
Initial Consultation Feedback
Attorney Mahoney prepared extremely well for the call and gave me the full confidence it was worth my investment to ask his firm to represent me in filing an EEO complaint. He was honest about my chances of success. He focused on asking specific questions that would support my claim applying his expe...
Thank you so much for leaving a review - we love to hear feedback like this! We work really hard to provide for a good experience and it is encouraging to see that reflected in your experience. Thanks, again!
"John is an expert in this field and highly respected among peers."
"I endorse this lawyer. John Mahoney is a leading expert in employment law. He cares deeply about the needs of his clients and uses his expertise to ensure the best possible outcome for them."
"John is a great attorney and wealth of information on federal employment legal matters."
Employment and labor lawyer
Military law lawyer
This lawyer was disciplined by a state licensing authority in 2024.
Reciprocal - Suspension issued in MD, 2024
updated on 05/13/2025This means that the attorney's misconduct in another state, or jurisdiction, also violated the rules for practicing law in Maryland.
Informal Admonition issued in DC, 2016
updated on 09/14/2016An admonition means an attorney did something wrong but may still practice law. The Bar gives the lawyer an admonition in hopes that he or she will not repeat the behavior.
2021
Federal Employment Lawyer of the Year in Washington D.C., Corporate INTL
2021
Federal Employment Law - Lawyer of the Year in Washington D.C., Global Law Experts
2021
Featured Attorney, Lawyers of Distinction
2021
Top Attorneys, National Law Journal
2021
Top Lawyer, American Lawyer
2021
AV Preeminent 5.0 out of 5 Peer Review Rated, Martindale-Hubbell®
2020
Client’s Choice Award, Avvo
2020
Federal Employment Lawyer of the Year in Washington D.C., Corporate INTL
2020
Federal Employment Law - Lawyer of the Year in Washington D.C., Global Law Experts
2020
Top 100 Attorney, America's Top 100 Attorneys
2020
Top Lawyer, American Lawyer
2020
AV Preeminent 5.0 out of 5 Peer Review Rated, Martindale-Hubbell®
2019
AV Preeminent 5.0 out of 5 Peer Review Rated, Martindale-Hubbell®
2019
Top Attorneys, National Law Journal
2019
Top Lawyer, American Lawyer
2018
AV Preeminent 5.0 out of 5 Peer Review Rated, Martindale-Hubbell®
2018
Top Lawyer, American Lawyer
2017
AV Preeminent 5.0 out of 5 Peer Review Rated, Martindale-Hubbell®
2016
AV Preeminent 5.0 out of 5 Peer Review Rated, Martindale-Hubbell®
2015
AV Preeminent 5.0 out of 5 Peer Review Rated, Martindale-Hubbell
2014
AV Preeminent 5.0 out of 5 Peer Review Rated, Martindale-Hubbell®
2013
AV Preeminent 5.0 out of 5 Peer Review Rated, Martindale-Hubbell®
2012
AV Preeminent 5.0 out of 5 Peer Review Rated, Martindale-Hubbell®
2011
AV Preeminent 5.0 out of 5 Peer Review Rated, Martindale-Hubbell®
2010
AV Preeminent 5.0 out of 5 Peer Review Rated, Martindale-Hubbell®
2009
AV Preeminent 5.0 out of 5 Peer Review Rated, Martindale-Hubbell®
2008
AV Preeminent 5.0 out of 5 Peer Review Rated, Martindale-Hubbell®
2007
AV Preeminent 5.0 out of 5 Peer Review Rated, Martindale-Hubbell®
2006
AV Preeminent 5.0 out of 5 Peer Review Rated, Martindale-Hubbell®
2005
AV Preeminent 5.0 out of 5 Peer Review Rated, Martindale-Hubbell®
2004
AV Preeminent 5.0 out of 5 Peer Review Rated, Martindale-Hubbell®
2003
AV Preeminent 5.0 out of 5 Peer Review Rated, Martindale-Hubbell®
2014 - Present
Principal, The Law Firm of John P. Mahoney, Esq., Attorneys at Law
2009 - 2014
Partner, Tully Rinckey, PLLC
2009 - 2014
Chairman of the Labor & Employment Law Practice Group, Tully Rinckey, PLLC
2003 - 2008
Managing Partner, Mahoney & Mahoney, LLP
2000 - 2003
Senior Associate, Shaw, Bransford, Veilleux & Roth
1992 - 1999
Attorney, Passman & Kaplan, PC
Member
Member
2009 - 2014
District of Columbia Bar, Labor and Employment LawCo-chair
2003 - 2004
District of Columbia Bar, Labor and Employment LawPast Chair
ATTORNEY MAHONEY'S CLIENT AWARDED NEARLY $330,000 BY THE EEOC:
MSPB Mitigated Client's Removal to 90-day suspension with backpay, benefits, & fees
Attorney Mahoney's Client Awarded Approximately $1,000,000, plus removal canceled and returned to LEO duty with a promotion.
EEOC Ruled Attorney Mahoney's client was discriminated against and ordered status quo anti relief, compensatory damages and fees..
Attorney Mahoney's Client's Removal Appeal Settled $45,000 in reasonable attorneys’ fees based upon the successfully enforced settlement.
Attorney Mahoney's Petition to Enforce Previous EEOC Decision Granted in successful SES nonselection EEOC case
Attorney Mahoney Secured Full-Relief Default Judgment Sanctions/Full Relied in Novel Removal EEOC Case
Settled Client's claims of sexual harassment, gender discrimination, and retaliation against FEC
Attorney Mahoney Settled Client's EEO Disability Discrimination Case v. NIH, NCI
Attorney Mahoney Successfully Represents the U.S. Department of the Treasury in MSPB RIF Appeal
Attorney Mahoney WIns EEOC SES Nonselection Case for Federal Employee
Attorney Mahoney won a finding of discrimination and an award of full relief, with backpay and compensatory damages in excess of $100,000
Attorney Mahoney Wins Novel Due Process MSPB Appeal for Class of Disabled Federal Employees
Attorney Mahoney won this case of first impression as the first case awarding compensatory damages under the Privacy Act, 5 U.S.C. § 552a
Attorney Mahoney Won a Class Action in D.D.C., receiving a multi-million dollar backpay award for all retired U.S. Park Police
42 U.S.C. Section 2000e-16 amended to cover Smithsonian Institution
1993
JD - Juris Doctor
1990
BA - Bachelor of Arts
2009
How to take an effective deposition- CLE Attendee
2011
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