Established in April 2001, the firm's Washington, D.C., office is located in a Leed Platinum building on the northern edge of the downtown business district near the vibrant Dupont Circle neighborhood.
Our Washington, D.C., office offers a wide range of legal services in matters involving litigation, intellectual property, regulations, investigations, policy work, and transactions. Our Washington-based attorneys have years of experience representing U.S. and international clients in matters involving Antitrust, Utility, Environmental & Energy, Transportation & Trade, Government Contracts, Intellectual Property, Securities, White Collar Defense & Investigations, Real Estate, Health Care, and State Attorneys General. We have handled litigation matters in both federal and state courts and have successfully tried dozens of cases. Our lawyers regularly represent firm clients before executive branch and regulatory agencies, as well as the Congress. Many of our attorneys have been published and have presented to industry, bar and trade groups on topics related to the office’s practice areas.
April 20, 2020
Super Lawyers has named 14 Cozen O'Connor attorneys to its 2020 Washington, D.C., Super Lawyers and Rising Stars list.
October 21, 2019
Bernie Nash, co-chair of the firm’s State Attorneys General Practice, is quoted in a Wall Street Journal article describing the upcoming courtroom showdown between Exxon Mobil Corp. and New York’s Attorney General over how the oil industry accounts for the impact of climate change.
October 14, 2019
Cozen O’Connor patent attorneys Jeff Townes and Hongling Zou represent, pro bono, three partner nonprofits established by parents of children with the ultrarare, and potentially fatal, alternating hemiplegia of childhood (AHC).
October 07, 2019
Cozen O’Connor today announced attorneys Christopher M. Sweeney and Alexandra E. Busch have joined its Washington D.C. Construction Law practice, bringing to four the number of lawyers who have joined the fast-growing practice in just the past two weeks.
September 23, 2019
Seeger and Keene have played leading roles in developing some of the largest building projects in Washington, D.C., one of the hottest and fastest-growing commercial and multifamily construction markets in the United States.
August 28, 2019
Best Lawyers selected 138 Cozen O’Connor lawyers from 21 of the firm’s national offices for inclusion in the 2020 edition of The Best Lawyers in America.
August 27, 2019
Jonathan was promoted to office managing partner while Meridith and Robert will be co-vice chair, office managing partners.
June 18, 2019
Hoyt has closed leasing transactions on behalf of landlords and tenants in excess of 15 million square feet, including major build-to-suit and corporate headquarters deals.
April 29, 2019
The Propeller Club – Port of Washington, DC, a chapter of the International Propeller Club of the United States a nonprofit dedicated to the enhancement and well-being of all interests of the maritime community, named Cozen O'Connor attorney Jeff Vogel their new Vice President.
April 25, 2019
The 2019 Washington, D.C, edition of Super Lawyers Magazine, published by Thomson Reuters, has named 13 Cozen O’Connor attorneys to its list of Super Lawyers and Rising Stars.
April 18, 2019
The main purpose of the advisory board, according to Law360, is “to get feedback on Law360’s coverage and gain insight from experts in the field on how best to shape future coverage.”
October 16, 2018
Fisher comes to Cozen O’Connor from Oblon, McClelland, Maier & Neustadt, L.L.P., where he was a partner and chair of that firm’s ITC Litigation practice group. He joins the firm as a member and will work out of its fast-growing Washington D.C. office.
March 27, 2018
Former LeClairRyan attorney Jeffrey N. Townes brings substantial experience in international life sciences IP to the firm's Washington, D.C., office.
February 20, 2018
Jonathan Grossman has been appointed Cozen O’Connor Washington, D.C., Co-office Managing Partner.
January 22, 2018
Biz Van Gelder, a member of Cozen O’Connor’s Criminal Defense & Internal Investigations Practice Group, discusses the challenges of convincing a jury when a case lacks “smoking gun” evidence in Law360.
January 01, 2018
Nicole Sprinzen, a member of Cozen O’Connor’s Criminal Defense & Internal Investigations Practice Group, discusses the significance of the upcoming sentencing and likely appeal of a former HSBC executive’s fraud conviction in Law360.
December 13, 2017
Cozen O’Connor Criminal Defense & Internal Investigation Practice Group members Barry Boss and Barbara “Biz” Van Gelder have been named 2017 “Top Lawyers” by Washingtonian magazine.
November 28, 2017
Megan Scheib, a member of Cozen O’Connor’s Criminal Defense & Internal Investigations Practice Group, was quoted by WFMZ-TV News. On Tuesday, November 28, 2017, Megan argued a motion to dismiss on due process grounds, imploring the court to drop the pay-to-play scheme charges against Allentown, Pa. attorney Scott Allinson.
November 16, 2017
Biz Van Gelder, a member of Cozen O’Connor’s Criminal Defense & Internal Investigations Practice Group, discusses Senator Robert Menendez’s months-long bribery trial in The Washington Post.
November 13, 2017
Marbury has handled disputes valued at, cumulatively, more than $4 billion
September 07, 2017
Meridith Moldenhauer, a member of Cozen O’Connor’s Zoning, Land Use & Development Practice, discusses the increase in proposed Comprehensive Plan amendments that Washington, D.C.’s Office of Planning received during an open call process to seek feedback from residents in Washington Business Journal.
August 23, 2017
Lawyers were selected for inclusion in the 2018 edition based on a rigorous peer-review that has been developed and defined for more than 30 years.
August 15, 2017
Barry Kearney, former associate general counsel of the National Labor Relations Board, joins the firm as of counsel.
August 03, 2017
Barry Boss discusses the conclusion of Bodog founder Calvin Ayre’s criminal case in GamblingCompliance.
June 27, 2017
The group is led by Meridith Moldenhauer, who joins as a member, and includes Samantha Mazo, who joins as of counsel, Alyssa Bigley and Eric DeBear, who both join as attorneys, and Stephen Varga, who joins as planning services director.
May 22, 2017
Cozen O’Connor’s State Attorneys General practice group has received the Burton Award’s first “Blog of the Year Award in Law.” The national awards program is held in association with the Library of Congress and co-sponsored by the American Bar Association.
May 15, 2017
Selection to Super Lawyers is based on peer nominations and evaluations are combined with independent research. Each candidate is evaluated on 12 indicators of peer recognition and professional achievement.
April 03, 2017
The management committee is pleased to welcome a particularly qualified group to membership, composed of outstanding attorneys who have demonstrated remarkable professionalism, leadership, dedication, and loyalty to the firm and the legal community at large.
February 27, 2017
Cozen O’Connor is pleased to announce that Jerry Kilgore has joined the firm’s State Attorneys General (AG) Practice as a member.
January 18, 2017
Vogel brings more than eight years of experience in maritime, national security, transportation infrastructure, and trade law to Cozen O’Connor’s Transportation & Trade Group.
January 04, 2017
Williams represents both individual and corporate clients in civil litigation, white collar and criminal defense matters and has handled investigations and arbitration proceedings involving breach of contract, fraud and tort claims.
December 19, 2016
Barbara Van Gelder and Nicole Sprinzen discuss recently released white papers from the Federal Energy Regulatory Commission in Law360.
December 01, 2016
Michael Klein discusses the adoption of fair market value legislation for investor-owned utilities in several U.S. states in Global Water Intelligence.
September 27, 2016
Quashie represents clients on a range of health care and life sciences matters, including federal regulatory and administrative health care matters, and has been on the forefront of legal issues surrounding telemedicine and digital health.
August 15, 2016
Sixty-two Cozen O’Connor lawyers from 13 of the firm’s national offices have been selected for inclusion in the 2017 edition of The Best Lawyers in America.
June 01, 2016
Howard Schweitzer discusses the most recent U.S. State Department report about Hillary Clinton’s emails on POTUS Politics radio show.
May 31, 2016
Howard Schweitzer, managing partner of Cozen O’Connor Public Strategies, discusses the latest developments regarding Hillary’s emails.
May 13, 2016
Barry is the only criminal defense attorney in the D.C.-area on the list this year.
May 12, 2016
Howard Schweitzer discusses the latest ruling on Obamacare and The Washington Post's research on Donald Trump on Newsmax Prime.
May 02, 2016
Howard Schweitzer discusses the Republican presidential primary race in Indiana on the Fort Wayne Morning News radio program.
April 20, 2016
Mark Alderman discusses the results of the New York primary on After the Bell.
April 14, 2016
Mark Alderman discusses the New York democratic primary race on Fox Business Network's After the Bell.
April 12, 2016
Mark Alderman discusses the unlikeliness of Speaker Paul Ryan joining the Republican presidential nomination contest.
April 04, 2016
Kerry McTigue's oral argument in Amgen Inc. v. Apotex Inc. was discussed in a Law360 article covering the case.
March 23, 2016
Mark Alderman discusses the way voters are reacting to the various presidential primary campaigns on Newsmax Prime.
March 16, 2016
Mark Alderman discusses the Republican and Democratic presidential primary races on Newsmax Prime.
February 01, 2016
Cozen O’Connor is pleased to welcome Barbara “Biz” Van Gelder as a member of its growing Criminal Defense & Internal Investigations practice in Washington, D.C. She joins Cozen O’Connor from Dickstein Shapiro LLP, where she was senior counsel and leader of the firm’s Congressional Investigations Practice.
January 14, 2016
New Member Further Strengthens Criminal Defense Practice.
December 01, 2015
Riley previously served as chief deputy attorney general in the Kentucky Attorney General’s office and will be resident in Cozen O’Connor’s Washington, D.C., office.
September 01, 2015
Bob Fallon and David Tiger have joined the firm as members in the Washington, D.C. office.
July 20, 2015
– Cozen O’Connor promoted six members to shareholder of the firm: Philip Carroll (Chicago), William Davis (New York), John B. Galligan (New York), Kendall Hayden (Dallas), Andrew Kay (D.C.) and Vincent Pozzuto (New York).
June 30, 2015
Milton A. Marquis, a member of Cozen O’Connor’s State Attorneys General Practice, has recently been elected to the Board of Trustees for Case Western Reserve University. Milton focuses his practice on antitrust and consumer protection litigation. As a member of the nation’s leading State Attorneys General Practice, Milton has represented major companies on a wide range of antitrust and consumer protection investigations and litigations and legal and policy matters involving state attorneys gen
June 17, 2015
Daniel Hardwick, a member of Cozen O’Connor’s Real Estate Practice Group, was selected by Legal Bisnow as one of their “2015 Trending 40 Lawyers Under 40,” which recognizes DC-area lawyers who are 40 and under and have distinguished themselves in the past year with exceptional performance for their firms and companies. Honorees will be profiled in an upcoming issue of Legal Bisnow. Daniel, along with other Trending 40 honorees, will also be honored at a reception on July 15 in Washington D.C.
May 05, 2015
On the heels of its recent announcement of the addition of 60 lawyers in Chicago, Cozen O’Connor is proud to announce the addition of ten attorneys and government professionals and the formation of the firm’s State Attorneys General Practice.
April 27, 2015
Washington, D.C., April 27, 2015 – The 2015 Washington, D.C., edition of Super Lawyers Magazine, published by Thomson Reuters, has named 11 Cozen O’Connor attorneys to its annual list of Super Lawyers and Rising Stars.
January 21, 2015
Bisnow interviewed several members of the Transportation & Logistic Practice who are residents in our Washington, D.C., office to get a realistic perspective of transportation and logistics issues coming up in 2015. For the article titled “This Firm Puts Advisors on Seven Continents. Here’s Why,” Bisnow spoke with David Heffernan, Ken Hines, Mark Atwood and Steve Lachter regarding aviation regulatory issues. On the maritime side, Bisnow had discussions with Marc Fink and also interviewed Jeff Lawrence as the chair of the Transportation & Logistics Practice Group.
September 19, 2014
David Heffernan and Mark Atwood, both of the Washington, DC office, participated in the ABA Air and Space Law Forum conference in Montreal, which featured the book
May 30, 2014
Chambers USA recognized 29 Cozen O’Connor lawyers as leaders in their respective fields; six attorneys were recognized nationally and eight were ranked in the top band. Stanley Sher was named a “Senior Statesman” in the “Transportation: Shipping: Regulatory (outside New York)” industry, for the pivotal role Sher plays in the firm’s continued success in the transportation industry.
May 07, 2014
Cozen O’Connor has continued to grow its Washington, D.C., office with the recent additions of health care attorney Ryan Blaney and aviation attorney David Heffernan, both of whom join the firm as members.
September 10, 2013
Cozen O’Connor has significantly bolstered the strength and scope of its national real estate practice with the addition of eight experienced lateral attorneys across the Washington, DC, New York, West Palm Beach, Wilmington, Philadelphia and Minneapolis offices in recent months, including seven partners and one associate.
August 28, 2013
Forty-six Cozen O’Connor lawyers from eight of the firm’s national offices have been selected for inclusion in The Best Lawyers in America. Attorneys were selected based on a rigorous peer-review of more than 4.3 million detailed evaluations. The list will be included in publications such as The Washington Post, Los Angeles Times, and New York magazine.
June 07, 2013
Barry Boss (Washington, D.C.) of the firm's Criminal Defense & Internal Investigations Practice Group in featured in the Daily Report regarding the most recent allegations of performance-enhancement drug use in major league baseball. The article titled, "Big Firms Score Baseball Drug Clients," notes Barry's representation of Detroit Tigers shortstop Jhonny Peralta.
March 27, 2013
Ian Blum, Alphonso Collins, Kathryn Crary, Lynnette Espy-Williams, Elizabeth Featherman, Matthew Glazer, Nelsy Gomez, Andrea Hammel, Keenya Harrold, Charles Jesuit, Jr., Lezlie Madden, Marilyn Neiman, Tracey Nguyen, Cartherine Rosato Reilly, Megan Scheib, Daniel Schuch, John Schwartz, Shari Shapiro, Marko Stamenkovic, and Norasha Williams have been elected to membership in the firm.
March 07, 2013
Attorneys Mark Alderman, Mark Gallant, Colin Roskey and Howard Schweitzer are highlighted in this article on Cozen O'Connor's growth in the Health Law and Public Strategies Groups.
January 03, 2013
To read the official press release from Governor Corbett’s office and to follow the lawsuit, click here.
August 28, 2012
Anne Madonia and Barry Boss Full-Tilt Settlement Featured in The Am Law Daily
April 16, 2012
Cozen O’Connor Continues Growth of IP Litigation Practice with Seven Partners, Two Associates from Duane Morris
March 09, 2012
Cozen O'Connor's Success in Washington, D.C. Featured in Washington Business Journal
February 16, 2011
Cozen O’Connor Names Seven New Shareholders
February 09, 2011
Forty-three Cozen O’Connor lawyers from six of the firm’s national offices have been selected for inclusion in the 2011 edition of The Best Lawyers in America. Lawyers were selected for inclusion in the 2011 edition based on a rigorous peer–review of more than 3.1 million detailed evaluations.
January 20, 2011
In an article titled, ''Insanity Defense Could Be A Tough Sell For Loughner,'' Barry Boss, co-chair of Cozen O'Connor's Criminal Defense & Internal Investigations Practice Group, comments on the attempted assassination of Rep. Gabrielle Giffords, specifically regarding an insanity defense. Boss states, ''The defense now has to prove by clear and convincing evidence, which is an extremely high burden ...that the defendant did not understand the wrongfulness of his conduct.''
July 27, 2010
Sher & Blackwell to Join Cozen O’Connor
January 04, 2010
Cozen O’Connor brings 2009 to a close with the announcement that another group of high-profile attorneys has joined the firm. Melissa H. Maxman, Ronald F. Wick and Marcela B. Stras have moved to Cozen O’Connor’s Washington, D.C. office from Baker Hostetler. The addition of these attorneys marks more than 100 high-level lateral hires in the past year and the continued implementation of the firm’s strategic plan, which calls for aggressive recruitment of key laterals with strong commercial litigation and corporate law practices.
September 29, 2009
Forty-two Cozen O’Connor attorneys from seven of the firm’s national offices have been selected for inclusion in the 2010 edition of The Best Lawyers in America.
March 25, 2009
Cozen O’Connor Attorneys Designated 2009 Washington, D.C., Super Lawyers By Law & Politics
March 16, 2009
Cozen O’Connor members Barry Boss and Hayes A. Hunt recently lectured on ''Witness Preparation and Direct Examination,'' as part of the District of Columbia Bar’s Essential Trial Skills Series. Boss and Hunt examined techniques and strategies for effective witness preparation and direct examination, including maximizing a witness' potential, while minimizing his or her weaknesses. They also discussed ethical issues in the context of witness preparation and direct examination.
April 08, 2008
Cozen O’Connor Attorneys Designated 2008 Washington, D.C., Super Lawyers by Law & Politics
March 31, 2008
Cozen O’Connor Acquires Prominent White Collar Defense Firm
March 20, 2008
Cozen O’Connor Members Barry Boss, Bernard S. Grimm And Hayes A. Hunt Lecture on Trial Skills for D.C. Bar