April 23, 2021

Ann Taylor


Ann Taylor is a paralegal with Zweiback, Fiset & Coleman LLP.  She has more than 20 years of litigation experience in both state and federal courts as well as arbitration.  Ann has worked on a wide variety of complex civil litigation matters from inception through appeal.  She also has experience in white collar criminal defense, government investigations and regulatory compliance. Ann was previously a paralegal at international firm, Alston & Bird.

Ann received her paralegal certificate from the University of California, Los Angeles, and her B.S. from the University of the Pacific.

August 30, 2019

Dawn Utsumi


Dawn Utsumi has successfully prosecuted and defended high-stakes business disputes across a variety of areas, including business torts, contracts, class actions, securities fraud, trade secrets, insurance, government investigations, and employment matters.  Dawn consistently achieves successful outcomes for her clients both before and at trial and has extensive experience in all stages of litigation.  Dawn was a key member of a trial team that successfully litigated a four-week federal jury trial in Minnesota in an RMBS-related action, resulting in a $27.8 million verdict for the client.  This trial was one of dozens of separate actions that resulted in recoveries of over $1 billion for the Trust.  She has also represented various individuals and entities—including a national financial services company, and a luxury hotel chain—in connection with DOJ investigations.   Recently, Dawn achieved early dismissal of a class action suit filed in the Northern District of Illinois alleging consumer protection violations.  Her national practice includes litigation at the trial and appellate level in both federal and state courts as well as arbitration.

Prior to joining ZFC, Dawn was an associate at Quinn Emanuel Urquhart & Sullivan and clerked for the Honorable Philip S. Gutierrez of the Central District of California.

  • Southwestern University School of Law, J.D.
  • Princeton University, Bachelor of Arts
June 18, 2018

Natasha Gill


Natasha Gill is an associate at Zweiback, Fiset & Coleman LLP. Her practice focuses on complex litigation and government investigations, including experience in intellectual property disputes, employment matters, privacy litigation, healthcare litigation and commercial disputes. Prior to joining ZFC, Natasha was an associate at a national law firm. 

  • University of Southern California (USC), Gould School of Law (J.D., 2015)
  • Pepperdine University (B.A., 2010)
June 20, 2015

Bryan Cunningham


Bryan Cunningham is a leading international expert in privacy and data protection law, cyber security, trade secrets, employee monitoring, and government surveillance issues, with special expertise in U.S. and European Union data protection law and compliance. Bryan developed this unique practice through extensive experience in senior U.S. Government intelligence and law enforcement positions. He served as Deputy Legal Adviser to then-National Security Advisor Condoleezza Rice. He also served six years in the Clinton Administration, as a senior CIA officer and federal prosecutor.  He drafted significant portions of the Homeland Security Act and related legislation, helping to shepherd them through Congress. He was a principal contributor to the National Strategy to Secure Cyberspace, worked closely with the 9/11 Commission and has provided legal advice to Presidents, National Security Advisors, the National Security Council, and other senior government officials on intelligence, terrorism, cyber security and other related matters.

Bryan’s practice has included assisting Fortune 500 and multinational companies to comply with complex, and often conflicting, data protection requirements under U.S. federal law, U.S. state laws, and the numerous specific requirements in the European Union and other overseas jurisdictions. He also has counseled start-ups and other companies in general matters and created and directs a privacy advisory committee for a multi-billion dollar company.

As the principal author of legal and ethics chapters in authoritative cyber security textbooks, Bryan is also a frequent media commentator on privacy, cyber security, electronic surveillance, intelligence, and other national security issues. He has appeared on CNN, Bloomberg, ABC, Fox, CNBC, NPR, and PBS, and has been published in numerous national newspapers and overseas publications.

Bryan is the current Executive Director of the University of California, Irvine’s Cybersecurity Policy & Research Institute. He was founding vice-chair of the American Bar Association Cyber Security Privacy Task Force and was awarded the National Intelligence Medal of Achievement for his work on information issues. He has served on the National Academy of Sciences Committee on Biodefense Analysis, the Markle Foundation Task Force on National Security in the Information Age, and the Bipartisan Policy Center Cyber Security Task Force.

  • University of Virginia School of Law, J.D., 1990
  • University of Iowa, Iowa City, B.A., 1984
June 19, 2015

Jeremy Masys


Jeremy Masys is an attorney with Zweiback, Fiset & Coleman with extensive experience in white collar civil and criminal investigations and litigation, specifically in the areas of securities fraud, insider trading, export violations, underwriter liability, and the Foreign Corrupt Practices Act. Jeremy previously worked in the New York and Los Angeles offices of WilmerHale, where he represented financial institutions and large corporations – including Goldman Sachs, Merrill Lynch, Bank of America, Citibank, J.P. Morgan Chase, Deutsche Bank, Credit Suisse, and BP, among others – in state and federal investigations and litigation.

Jeremy also has a robust family law practice and has been integral to the firm’s representation of clients in high stakes divorce litigation. Jeremy is an accomplished freelance writer and received an Annenberg Fellowship from USC in 2011 for creative writing. At New York University School of Law, Jeremy served as an editor of the Journal of Law and Business and received the George A. Katz award for excellence in securities regulation.  Jeremy frequently volunteers his time with the Harriett Buhai Center for Family Law, where he is a member of the Pro Bono Panel.

  • New York University School of Law, New York
    J.D., May 2006
  • University of Southern California, Los Angeles
    M.F.A., May 2013
  • Ohio Wesleyan University
    B.A., May 1999
June 18, 2015

Erin Perez-Coleman


Erin Perez-Coleman is a co-founder and partner of Zweiback, Fiset & Coleman LLP. Erin has successfully litigated in both state and federal courts. Erin focuses her practice on matters involving complex civil litigation, white collar criminal defense and data security issues. She regularly represents individuals and companies in a wide range of litigation matters including healthcare fraud, political corruption, bribery, SEC violations, government investigations, money laundering, and environmental crimes. Erin’s litigation practice also includes successfully carrying out internet enforcement actions against cybercrime and defending companies in data privacy litigation.

Prior to co-founding Zweiback, Fiset & Coleman LLP, Erin was a senior level associate at national defense firms Arent Fox LLP and Alston & Bird LLP. Erin counseled clients at every stage of litigation, from filing or answering the initial complaint to resolution of the matter.

Representative Cases
    • Represented client in alleged large-scale customs violations investigation and alleged money laundering scheme
    • Represented former Sheriff of Los Angeles accused of crimes relating to obstruction of justice and perjury
    • Defended jewelers in counterfeit charges brought by Los Angeles District Attorney’s office
    • Defended City in SEC litigation relating to alleged fraudulent municipal bond offering
    • Defended seafarer accused of violations related to “oil dumping” by U.S. Attorney’s office
    • Multiple representations of political officials in state and federal investigations
    • Defended mortgage servicers in defense of foreclosure actions (wrongful foreclosure, violations of the California Homeowner Bill of Rights, HAMP)
    • Represented Microsoft Corporation (Microsoft v. John Does) in various injunction proceedings for the seizure of internet domains used to operate illegal botnets
    • Represented asylum seeker during removal proceedings resulting in relief under the Convention Against Torture Act before the Immigration Court in Los Angeles
  • Pepperdine University School of Law (J.D., 2011)
  • Straus Institute for Dispute Resolution, Certificate, 2011
  • University of California, Santa Barbara (B.A., 2007) High Honors
June 18, 2014

Rachel L. Fiset


Rachel L. Fiset is a co-founder and managing partner of Zweiback, Fiset & Coleman LLP. Rachel’s practice includes varied civil and criminal state and federal litigation, government investigations, regulatory compliance, mediations, appeals and arbitrations. Rachel has achieved outstanding results for Fortune 500 companies, mid-to-small size companies and individuals accused of healthcare fraud, political corruption, bribery, SEC violations, real estate investment fraud, environmental violations, import/export violations, money laundering, copyright infringement and theft of trade secrets. Rachel’s complex civil practice has included favorable settlements and victories in various matters relating to healthcare, telecommunications, social media, energy companies, entertainment, government contracting and finance.

Prior to founding Zweiback, Fiset & Coleman LLP Rachel worked at top international law firms, including Quinn Emanuel Urquhart & Sullivan. Rachel clerked for the Honorable Consuelo B. Marshall, Chief Judge Emeritus of the Central District of California.

Representative Cases

Government Investigations / White Collar Criminal Defense

    • Represented former Sheriff of Los Angeles accused of crimes relating to obstruction of justice and perjury
    • Represented former City Attorney in high-profile L.A. District Attorney investigation into political corruption
    • Represented government contractor accused of environmental violations relating to toxic waste storage in Ventura County
    • Represented City in SEC litigation relating to alleged fraudulent municipal bond offerings
    • Represented seafarer accused of violations related to “oil dumping” by U.S. Attorney’s office
    • Represented multiple individuals and entities in investigations by the U.S. Attorney’s office relating to theft of intellectual property
    • Represented optical lens manufacturing company in U.S. Attorney investigation into violations of the Export Control Act
    • Represented real estate investment firm in L.A. District Attorney investigation into real estate fraud
    • Represented individuals and entities in investigations relating to the use of funds at charter schools

Civil Matters

    • Successful defense at arbitration of high-profile venture capitalist accused of fraud and breach of contract relating to the acquisition of a popular social networking website
    • Obtained successful settlements on behalf of the Academy of Motion Picture Arts and Sciences for intellectual property infringement of Oscar©
    • Represented hotel industry employees in a high-profile litigation into theft of trade secrets
    • Obtained favorable resolution for telecommunications company at international arbitration (ICC)
    • Obtained summary judgment on behalf of City claiming multiple False Claims Act violations by former developers
    • Represented energy company at multiple mediations relating to damages caused by the San Diego wildfires
    • Successfully defended appeal brought against a City at the California Court of Appeal
    • Represent filming equipment company in breach of contract and fraud case

Healthcare Matters

    • Defense of hospital owner accused of wide ranging multi-million dollar kickback scheme
    • Represented hospital in City Attorney investigation into “patient dumping”
    • Defense of pain management doctor accused of distribution of controlled substances
    • Defense of Director of Nursing at skilled nursing facility against charges of elder abuse brought by the Cal. Attorney General
    • Obtained denial of writ of certiorari by the Supreme Court of the United States for large non-profit women’s healthcare provider
    • Multiple representations on behalf of hospitals, healthcare companies and healthcare industry professionals accused of False Claims Act violations
    • Multiple representations on behalf of pharmacies and other healthcare providers at administrative hearings related to licensing and government payor insurance
  • UCLA School of Law, J.D.
  • University of Delaware, M.A. – Mass Communication
  • Purdue University, B.A. – Telecommunication and Psychology
January 17, 2013

Michael Zweiback


Michael Zweiback is a co-founder of the firm and has significant experience in white collar criminal defense, complex commercial litigation and trial practice in state and federal courts across the country. Michael has also litigated complex commercial disputes in international arbitration forums. Michael is a former big law partner and multiple practice group leader across a broad range of practice disciplines including, Cyber Security and Privacy, National Security and Digital Crimes, and Government Investigations and Trial Practice.

Michael formerly served as an Assistant U.S. Attorney in the Central District of California and was Chief of the Cyber & Intellectual Property Crimes Section where he investigated and prosecuted cyber related crimes including computer intrusions, privacy related offenses and the theft of intellectual property and trade secrets. Michael served as a principal advisor to the U.S. Attorney General’s Advisory Committee on Cyber Crime. Michael also served as the Deputy Chief of the Terrorism and Organized Crime Section supervising and prosecuting national security investigations.

Michael is currently listed in The Best Lawyers in America in the area of Criminal Defense: White-Collar (2016-2020). He has significant experience defending government investigations on behalf of individuals and corporations in health care, financial services, antitrust, and anticorruption, including the FCPA. He also has significant experience defending against enforcement actions brought by agencies such as the SEC, FTC, as well as State Attorneys’ General in a variety of areas including, alleged violations of various provisions of federal and state data security and privacy laws.

Michael is a frequent commentator in print, radio and television on federal and state criminal matters, data security and national security related matters.

Representative Cases

White Collar:

    • Represented former Los Angeles County Sheriff Lee Baca in a federal prosecution concerning false statements provided to the FBI.
    • Represented a defendant in the “Night Shades” cyber intrusion investigation prosecuted by the United States Attorney’s Office for the Southern District of New York.
    • Represented political figure in a public corruption investigation conducted by the District Attorney’s Office Public Integrity Division. No charges were filed.
    • Represented a California investment firm in an investigation by the SEC in the Southern District of New York. The investigation was declined for an enforcement action.
    • Represented multiple high-net-worth individuals in an investigation by the IRS and DOJ Tax Division for alleged failure to declare overseas investments in European and Israeli financial institutions. The DOJ declined prosecution.
    • Represented the former mayor of Rosemead, California, in a bribery and corruption prosecution brought by the U.S. Attorney’s Office and FBI.
    • Represented an oncology practice under investigation by the U.S. Attorney’s Office in the Southern District of New York for alleged health care fraud. The investigation was declined with no charges filed.
    • Represented a home health care provider in the Southern District of Alabama under investigation by the FBI for alleged fraudulent billings and false claims. The investigation was declined with no charges filed.
    • Represented a federal law enforcement agent in an investigation by the IRS for misuse of IRS computer databases, resulting in a declination of all charges.
    • Represented a Fortune 500 client in an investigation by multiple California District Attorney’s Offices for alleged violations of California consumer protection laws.

Data Security

    • Represented Microsoft Corporation (Microsoft v. John Does) in various injunction proceedings related to the seizure of malicious internet domains used to operate illegal botnets
    • Advising various entities regarding ransomware infections, and data breaches.
    • Advised a multinational corporation on EU Safe Harbor issues. Advised online companies on issues involving data aggregation, web crawling and EU privacy rules.
    • Advised a California university on issues related to the intrusion of a university sequel database containing student information.
State Bar
  • California
  • District of Columbia
  • Loyola Marymount University (J.D., 1989)
  • University of California, Los Angeles (B.A., 1986)