Client Alerts
On September 1, 2026, the United States Court of Appeals for the Eleventh Circuit issued its widely anticipated decision in …
September 3, 2026
September 3, 2026 • 8-minute read
Partner
Government Contracts and Government Investigations & White Collar Criminal Defense
“Companies contracting with the government face unique compliance obligations and risks of disputes, investigations, and enforcement actions. I help clients adopt effective responses to these challenges, drawing on my DOJ experience and procurement law background to advance their business objectives.”
Chambers USA, 2026
Alexander Canizares is a Partner in the firm’s Washington, D.C. office and Co-head of the firm’s Government Contracts Practice Group. Alex draws on almost two decades of experience in the government and private practice to assist clients in high-stakes litigation, internal and government investigations, enforcement actions, and counseling spanning all phases of federal procurement. A former trial lawyer with the U.S. Department of Justice’s Civil Division, Alex represents clients in False Claims Act (FCA)/qui tam whistleblower actions and investigations involving fraud allegations. He also helps clients navigate mandatory and voluntary disclosures to federal agencies and mitigate risks involving the FCA and misconduct.
Alex serves as lead counsel in litigation related to bid protests, contract claims, and prime-subcontractor disputes. He has first-chaired dozens of cases at both the trial and appellate levels involving federal agencies. His experience includes litigating in U.S. district courts, the U.S. Court of Federal Claims, the Government Accountability Office, the U.S. Court of Appeals for the Federal Circuit, and arbitral tribunals. Alex conducts internal investigations involving government contracts compliance matters. He represents clients of all sizes in the aerospace and defense, information technology, healthcare, professional services, and other industries.
In his counsel to clients, Alex advises on a wide range of government contracting matters with a focus on mitigating compliance risks and avoiding disputes. He helps contractors address cybersecurity and supply chain security requirements, including those related to safeguarding controlled government data involving Department of Defense and civilian agencies. He provides practical guidance to contractors across a variety of industries on the Federal Acquisition Regulation (FAR), agency FAR supplements, and federal procurement laws. Additionally, Alex’s counseling practice extends to commercial products/services contracting including related to software, procurement integrity/ethics issues, the Anti-Kickback Act, subcontracting, suspension and debarment issues, the Freedom of Information Act (FOIA), intellectual property/data rights, domestic sourcing requirements in procurements, and diligence in corporate transactions.
Alex writes and speaks frequently regarding government contracting issues. He is a co-chair of the American Bar Association (ABA) Public Contract Law Section Procurement Fraud and False Claims Committee. He is also a contributing editor of the second edition of The False Claims Act and Government Contracts published by the ABA Public Contract Law Section.
Defend a defense contractor in a Department of Justice (DOJ) False Claims Act investigation regarding supplies for the Department of Defense
Represent a healthcare company in a government FCA investigation and qui tam lawsuit related to federal insurance programs
Represent a government contractor in an investigation conducted by an agency Office of Inspector General
Represent a healthcare device manufacturer in a government FCA investigation
Advise an aerospace/defense contractor regarding FCA matters and related contract and disclosure obligations
First-chaired a five-day trial involving FCA and other fraud-related claims in a case arising out of a contract case concerning an Army Corps of Engineers construction project
Represented a government services contractor in a prime-subcontractor dispute before U.S. District Court for the Eastern District of Virginia and AAA arbitration
Represent company in a breach of contract action against the United States (Silver State Land LLC v. United States, Court of Federal Claims No. 19-688)
Successfully defended the Coast Guard’s $3 billion award to a contractor for construction of Offshore Patrol Cutters (Eastern Shipbuilding Group, Inc. v. United States, No. 22-1571C (Court of Federal Claims, December 14, 2023))
Represented intervenor-awardee in a bid protest before GAO arising out of National Aeronautics and Space Administration (NASA) small business contract for mechanical engineering and other services (ATA Aerospace, LLC, B-419962.2, B-419962.3)
Successfully represented a defense contractor’s award of a $558 million contract to provide base support services to the U.S. Air Force in Africa and Europe. Defended against back-to-back protests before GAO and the U.S. Court of Federal Claims (Vectrus Sys. Corp. v. United States, Fed. Cl. 20-2053 C, Vectrus Sys. Corp., B-419143, Dec. 23, 2020)
Defended defense contractor in successive bid protests arising out of the U.S. Army’s Logistics Civil Augmentation Program (LOGCAP) V before the GAO and U.S. Court of Federal Claims (DynCorp International, LLC, B-417506.10, DynCorp International, LLC v. United States, Case No. 19-1133C, et al.)
Represented a company in a bid protest defense before GAO with respect to a Naval Air Warfare Center contract for cyber warfighting support services
Successfully defended the United States before the U.S. Court of Federal Claims and U.S. Court of Appeals for the Federal Circuit in a post-award bid protest contesting a Navy contract for moving and storage services for personnel at Guantanamo Bay, Cuba
Successfully defended the Navy’s $160 million contract to modify and operate a vessel to be used by the U.S. Special Operations Command to support national security missions in a bid protest concerning cost realism analysis and adequacy of corrective action
Lead counsel on behalf of the United States in a bid protest reviewing agency’s corrective action and justification for a $3.6 million sole-source bridge contract award to obtain information technology services
Served as lead counsel in successful defense of the United States against alleged breaches of contract in the U.S. Court of Federal Claims related to a government criminal investigation and prosecution
Successfully defended the government in a class action lawsuit in the U.S. Court of Federal Claims brought by Federal Bureau of Investigation (FBI) police officers
Counsel defense contractors with respect to cybersecurity requirements under FAR Supplement 252.204-7012 and other FAR/Defense Federal Acquisition Supplement (DFARS) clauses, as well as emerging regulatory requirements related to cybersecurity/government contracting (e.g., Cybersecurity Maturity Model Certification (CMMC))
Advise technology company with respect to FedRAMP cloud computing security requirements and risk mitigation
Advise contractors with respect to protection of company information against disclosure under FOIA
Advise contractors with respect to Buy American Act (BAA)/Trade Agreements Act (TAA) compliance issues
Advise companies with respect to protection of IP and data rights related to government contracts
Counsel companies with respect to compliance with Section 889 of the FY 2019 National Defense Authorization Act related to telecommunications equipment and services
Counsel a government contractor with respect to intellectual property and data rights licensing issues in connection with AI/machine learning technology
Represent companies in connection with eligibility issues and enforcement risk mitigation in relation to Paycheck Protection Program (PPP) small business loans
Advise companies with respect to suspension and debarment matters
Represent a Fortune 100 company in acquisition diligence of government contracts
Conduct diligence on government contracts matters related to a potential transaction involving a defense contractor, including with respect to government data rights related to software
Represent a public company in government contracts-related matters in connection with the sale of the company
Education
Admissions
Client Alerts
On September 1, 2026, the United States Court of Appeals for the Eleventh Circuit issued its widely anticipated decision in …
September 3, 2026
September 3, 2026 • 8-minute read
Articles
5 Strategies to Reduce the Risk of a DOJ False Claims Act Investigation
The Department of Justice (DOJ), via messaging from its leadership, has made clear it will prioritize and pursue aggressive civil False Claims Act (FCA) enforcement against companies that receive federal dollars. As the government’s primary civil remedy to redress fraud against the government, the FCA generates billions of dollars in annual DOJ settlements and judgments with the majority initiated by whistleblower qui tam lawsuits.
August 17, 2026
August 17, 2026 • 2-minute read
Client Alerts
CMMC Phase II Requirements Are Suspended: What Defense Contractors Need to Know
On July 13, 2026, the Department of War (DoW) announced that it was immediately suspending Phase II of its Cybersecurity …
July 16, 2026
July 16, 2026 • 5-minute read
Events
Alexander Canizares, Jamie Tabb, and Tyler Robinson presenting ACC NCR Webinar
On June 24th at 2:00 p.m. ET, Alex Canizares, Jamie Tabb, and Tyler Robinson along with Kimberly Hyde of BAE …
June 24, 2026
June 24, 2026 • 1-minute read
Client Alerts
Unrelated Relators: DOJ Launches FOCUS Initiative as Data-Driven FCA Filings Surge
Traditionally, a Department of Justice (“DOJ” or the “Department”) False Claims Act (“FCA”) investigation starts with someone with inside knowledge …
May 20, 2026
May 20, 2026 • 6-minute read
Awards & Rankings
The Legal 500 US 2026 recommended Vinson & Elkins as a leading law firm in 47 practice categories. In total, …
June 10, 2026
June 10, 2026 • 3-minute read
Awards & Rankings
Vinson & Elkins announced today that it achieved 20 Band 1 rankings in Chambers USA 2026: Nationwide: Energy Transition; Energy: …
June 4, 2026
June 4, 2026 • 3-minute read
Media Coverage
Alex Canizares offered an update on Department of Justice Civil False Claims Act enforcement priorities, noting that “$6.8 billion went …
May 22, 2026
May 22, 2026 • 1-minute read
Deals & Cases
Vinson & Elkins Advises L3Harris on Partnership with US Department of War
Vinson & Elkins is representing L3Harris Technologies (NYSE: LHX) in connection with its announced first-of-its-kind proposed partnership with the US …
January 13, 2026
January 13, 2026 • 1-minute read
Firm News
Vinson & Elkins Hires Alex Canizares as Co-Head of Government Contracts Practice
Canizares has significant experience in private practice and government, handling high-stakes litigation, investigations and enforcement actions.
April 14, 2025
April 14, 2025 • 2-minute read
our People
Please note that any communication with Vinson & Elkins via e-mail through this website does not constitute or create an attorney-client relationship with V&E. Please do not send any confidential information. A conflicts-of-interest procedure must be completed by V&E prior to establishment of an attorney-client relationship. When you execute an engagement letter from V&E you will be our client, and you may then exchange information freely with a V&E attorney.
By clicking “Accept,” you agree that we may review any information you transmit to us. You recognize that our review of your information, even if it is highly confidential and even if it is transmitted in a good faith effort to retain us, does not preclude us from representing another client directly adverse to you, even in a matter where that information could and will be used against you.