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  • J.D., George Washington University Law School, 2008
  • B.A., Colgate University, with High Honors, summa cum laude, Phi Beta Kappa, 2005

Bar Admissions

  • Massachusetts

Court Admissions

  • U.S. Court of Appeals, District of Columbia Circuit
  • U.S. Court of Federal Claims
  • U.S. District Court, District of Massachusetts

Memberships & Affiliations

American Bar Association, Section of Public Contract Law

National Contract Management Association (NCMA) Co-Vice President of Education, 2012-2014, Co-Chair of the Annual March Workshop, 2012-2014 and Co-Vice President of Membership, 2015-2017

International Trademark Association (INTA)

Bonnie A. Vanzler

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  • T: 617.449.6501
    F: 617.326.3023

Bonnie is an associate in the Government Contracts and Intellectual Property/Information Technology practice groups resident in the Boston Office.

As a part of her Government Contracts practice, Bonnie provides clients guidance for complying with federal, state, and local public procurement requirements. She frequently represents clients in bid protest litigation before federal agencies and the U.S. Government Accountability Office. In addition, Bonnie routinely litigates contract disputes in the U.S. Court of Federal Claims and the Boards of Contract Appeals.

Bonnie has experience counseling companies on General Services Administration Schedules, Small Business Administration contracting programs, Buy American and Trade Agreements Act requirements, business ethics compliance, export control regulations, protecting intellectual property and data rights, commercial item contracting, and negotiating contract terms and conditions.

In addition to her government contracts work, Bonnie counsels clients on trademark selection and trade dress clearance and participates in trademark prosecution proceedings before the U.S. Patent and Trademark Office. She is experienced in representing clients in trademark and patent infringement and false advertising litigation in federal district courts and the U.S. Courts of Appeals.

Bonnie is an active member of the Boston Chapter of the National Contract Management Association (NCMA) and currently serves on the Executive Committee as the Co-Vice President of Membership.  She has presented on bid protests, the Freedom of Information Act, and other government contracting topics at Chapter events and has moderated the Executive Panel at the Chapter’s annual Women’s Leadership Forum in 2015 and 2016.  Bonnie was named “Member of the Year” in 2012 and as “Member of the Quarter” in 2013 and 2016 in recognition of her leadership within the Boston Chapter.

Bonnie graduated summa cum laude from Colgate University, where she was a member of Phi Beta Kappa. She received her law degree from The George Washington University Law School, where she was the Executive Articles Editor on the American Intellectual Property Law Association (AIPLA) Quarterly Journal and President of The George Washington University Law School Environmental Law Association. During law school, Bonnie was also a finalist and awarded Best Brief in the Van Vleck Constitutional Law Moot Court Competition presided over by Judge Stephen R. Reinhardt (U.S. Court of Appeals for the Ninth Circuit), Judge Janice Rogers Brown (U.S. Court of Appeals for the D.C. Circuit), and Judge Randall R. Rader (U.S. Court of Appeals for the Federal Circuit).

Representative Matters

Government Contractor Suspension Lifted – Agiltron, Inc.
Led by Dan Kelly, a team of McCarter & English attorneys successfully represented Agiltron, Inc., Nanotrons Corp., and Agiltron Development Corp. in their negotiations with the Department of the Air Force Suspension and Debarment Official of an Administrative Agreement providing for the July 26, 2013 termination of their suspension from federal government contracting.
Prevailed in Bid Protest against DISA
Represented Batelco, the Bahraini telecommunications company, in a protest before the Government Accountability Office (GAO), Bahrain Telecommunications Company, B.S.C., B-407682.2, B-407682.3 (Jan 28, 2013), challenging an award by the Defense Information Systems Agency (DISA), Defense Information Technology Contracting Organization (DITCO) for a communications circuit. GAO found that the agency’s technical evaluation of the awardee was unreasonable and flawed, sustained the protest and awarded Batelco costs and reasonable attorneys fees.
Settlement of Executive Compensation of President of Defense Contractor
Reached favorable settlement on behalf of a defense contractor client whose President’s executive compensation was challenged as unreasonable and allowable by the Defense Contract Audit Agency and the Defense Contract Management Agency.
Agency Appeal - LePage's
LePage’s in an agency appeal before the D.C. Circuit and on remand before the Postal Regulatory Commission. Not only did the Court of Appeals rule in LePage’s favor, finding the agency’s decision to be arbitrary and capricious, but the Court also awarded LePage’s its attorneys’ fees under the Equal Access to Justice Act (EAJA), concluding that the agency’s decision was not substantially justified.
Construction Contractor In A Differing Site Condition
Construction contractor in a differing site condition claim before the Armed Services Board of Contract Appeals, culminating in a favorable settlement for the client.


National Contract Management Association’s 4th Annual Women’s Leadership Development Seminar
55th Annual March Workshop - National Contract Management Association (NCMA) Boston Chapter
National Contract Management Association (NCMA) Boston Chapter’s 3rd Annual Women’s Leadership Forum
National Contract Management Association Boston Chapter’s 54th Annual Workshop