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 26 - 30 of 62 reviews
Posted by anonymous | August 03, 2021 | Hired Attorney | Lawsuits & Disputes
Mr. Mahoney’s quick response and his experience in federal law made hiring him an easy decision.
After calling several attorneys and getting no response, Mr. Mahoney was quick to return my call and put me at ease with his experience and professionalism. I was very pleased with our conversation. I’m grateful he took my case.
Posted by Kim | July 14, 2021 | Hired Attorney
Someone on my side!
I had my initial consult with Mr. Mahoney and I have to say my stress level significantly decreased after our discussion. Just knowing I have an advocate committed to helping me resolve my challenge is a HUGE relief. He is very knowledgeable and I very much appreciated his ability to break down compl...
Posted by James | June 28, 2021 | Hired Attorney | Employment & Labor
Excellent Rapport
My consultation with Attorney Mahoney was provided great relief and peace of mind with regard to my Federal employment case. He was extremely knowledgeable, and very quickly boiled the case down to layman's terms, which I could understand, making it obvious to me that he was well versed in all aspect...
Posted by anonymous | June 01, 2021 | Hired Attorney
Excellent
I am in the early stages of representation with Esq. Mahoney, but I have to note his abilities to kindly and earnestly listen and synthesize information and come to reasonable conclusions. With clear experience, he's candidly and strategically laying out the path ahead. I feel relieved to be in Esq...
Thank you for the great review! We work hard to meet expectations like yours, and we are happy to hear we hit the mark for you.
Posted by Jeanne | May 18, 2021 | Hired Attorney
Did Not Hesitate, Hired!
After my consultation with Mr. Mahoney, I knew right then and there that he is the one. He is patient, listened to, and addressed my concerns with extreme knowledge and professionalism. I am relieved to know that there is someone out there who cares and is willing to help, that person is Mr. John P M...
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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