Practice Areas/Securities Litigation & Enforcement

Practice Area

Former Government Securities Professionals

Connect with the people who investigated, litigated, and reviewed securities matters for the government.

Securities Litigation & Enforcement

Securities Experience From Inside the System

Securities matters are decided by a small set of institutions with distinct instincts: the SEC's enforcement staff, federal prosecutors, and the courts. The professionals below drafted and enforced securities regulations from inside those institutions, and that vantage point is what you engage them for.

Members in this practice area

Securities Litigation & Enforcement

Showing 1–10 of 75

Ranked by relevance to Securities Litigation & Enforcement from verified member profiles.

Kevin B. Muhlendorf

Verified15 years of government experience

Securities Enforcement and White Collar Defense

AI SummaryFormer Assistant Chief in DOJ Fraud Section and Senior Counsel at SEC, specializing in securities fraud and anti-corruption, now leading internal investigations and advising on white collar crime. Served as Acting Inspector General for WMATA, overseeing audits and investigations.

Current

PartnerWiley Rein LLP

Foreign Corrupt Practices Act (FCPA)Civil Litigation

Former Government

Acting Inspector GeneralWashington Metropolitan Area Transit Authority (WMATA)

Auditing

Practice Areas

Sectors

WashingtonView Profile →

Mark A. Racanelli

Verified5 years of government experience

Global Co-Chair WhiteCollar Defense and Corp. Investigation

AI SummaryMark Racanelli served as an Assistant U.S. Attorney for five years, specializing in white collar crime and criminal law. His experience in litigation, corporate investigations, and regulatory enforcement suits him for roles in white collar crime, corporate law, and securities law.

Current

PartnerO'Melveny & Myers LLP

Foreign Corrupt Practices Act (FCPA)Civil Litigation

Former Government

Assistant US AttorneyU.S. Attorney’s Office

White Collar CrimeLegal

Practice Areas

Sectors

New York, New YorkView Profile →

Lisa M. Noller

Verified10 years of government experience

Investigation, Litigation, Criminal & Civil Law, Appeals

AI SummaryLisa Noller served as an assistant U.S. attorney in Chicago, specializing in civil and criminal prosecutions. Her expertise in healthcare litigation and white-collar defense suits her for roles in complex fraud and regulatory matters.

Current

Litigation Department ChairFoley & Lardner LLP

Civil LitigationLegal

Former Government

Deputy ChiefU.S. Attorney’s Office

Civil LitigationFederal Government

Practice Areas

Sectors

Chicago, IllinoisView Profile →

Byron J. McLain

Verified6 years of government experience

Government Enforcement Lawyer and Former AUSA

AI SummaryByron J. McLain served as a federal prosecutor in the U.S. Attorney's Office for the Central District of California, specializing in white-collar crime. His current roles in white-collar criminal defense and corporate investigations leverage his prosecutorial experience.

Current

Government Enforcement Defense & Investigations Partner (Equity Partner)Foley & Lardner LLP

Civil LitigationInvestigations

Former Government

Deputy ChiefU.S. Attorney’s Office

Planning, Policy, StrategyManagement

Practice Areas

Sectors

Los Angeles, CaliforniaView Profile →

Rebecca Mermelstein

Verified13 years of government experience

White collar and finance-related investigations & litigation

AI SummaryRebecca Mermelstein served as an Assistant U.S. Attorney for over a decade, specializing in white-collar crime and finance-related investigations, which suits her current role as a partner in white-collar and finance-related investigations and litigation.

Current

PartnerO'Melveny & Myers LLP

Foreign Corrupt Practices Act (FCPA)Civil Litigation

Former Government

Co-ChiefU.S. Attorney’s Office

Foreign Corrupt Practices Act (FCPA)Securities Law

Practice Areas

Sectors

New York, New YorkView Profile →

Michael Tubach

Verified8 years of government experience

Civil litigation and white-collar criminal defense lawyer

AI SummaryMichael Tubach served as an Assistant U.S. Attorney and Bristow Fellow, specializing in civil litigation and criminal defense, which suits his current role as a civil litigation and white-collar criminal defense lawyer.

Current

Managing Partner of the Firm’s San Francisco office | Chair of O’Melveny’s firmwide Pro Bono CommitteeO'Melveny & Myers LLP

Civil LitigationSecurities Law

Former Government

Assistant U.S. AttorneyU.S. Attorney’s Office

Civil LitigationResearch

Practice Areas

Sectors

San Francisco, CaliforniaView Profile →

Steven J. Olson

Verified8 years of government experience

Government Enforcement Defense & Investigations Litigation

AI SummaryFormer Assistant US Attorney, now advising on government investigations and litigation, specializing in white-collar crime and complex civil litigation.

Current

Litigation Department Co-Chair / PartnerO'Melveny & Myers LLP

Foreign Corrupt Practices Act (FCPA)Civil Litigation

Former Government

Assistant United States AttorneyU.S. Attorney’s Office

Civil LitigationLegal Assistant

Practice Areas

Sectors

Los Angeles, CaliforniaView Profile →

Sharon M. Bunzel

Verified7 years of government experience

White Collar Defense & Corporate Investigations

AI SummarySharon Bunzel served as an Assistant US Attorney, overseeing complex investigations. She specializes in white-collar defense, corporate investigations, and compliance programs.

Current

PartnerO'Melveny & Myers LLP

Environmental LawForeign Corrupt Practices Act (FCPA)

Former Government

Assistant United States AttorneyU.S. Attorney’s Office

LegalExecutive Assistant

Practice Areas

Sectors

San Francisco, CaliforniaView Profile →

Danny S. Ashby

Verified

Partner at O’Melveny Law Firm. Dallas, TX

AI SummaryServed as a trial attorney in the US Department of Justice and special assistant US Attorney; specializes in white-collar criminal defense, securities law, and corporate litigation.

Current

PartnerO'Melveny

Civil LitigationSecurities Law

Former Government

Trial AttorneyU.S. Department of Justice (DOJ)

Legal AssistanceGovernment

Practice Areas

Sectors

Dallas, TexasView Profile →

Aaron S. Dyer

Verified6 years of government experience

Partner at Pillsbury Winthrop Shaw Pittman LLP

AI SummaryAaron S. Dyer served nearly seven years as a federal prosecutor in the U.S. Attorney’s Office in Los Angeles, specializing in complex fraud cases.

Current

PartnerPillsbury Winthrop Shaw Pittman LLP

AttorneyCivil Litigation

Former Government

Assistant United States AttorneyU.S. Attorney’s Office

AttorneyFederal Government

Practice Areas

Sectors

Los Angeles, CaliforniaView Profile →

Use Cases

Common Reasons People Seek Securities Regulation & Enforcement Expertise

A few of the situations these professionals are engaged for, among many:

SEC Investigation Response

A subpoena or formal order of investigation starts a process with its own rhythms: document demands, testimony, and eventually the staff's view of your conduct. Former enforcement attorneys have run that process and know what each stage signals.

Wells Submissions and Defense Strategy

Before the SEC recommends charges, respondents can make their case. People who evaluated those submissions on the staff side know which arguments actually change outcomes and which fall flat.

Securities Class Actions

Shareholder suits follow stock drops, restatements, and merger announcements. Former government litigators and judges bring independent case assessment and expert testimony to both sides.

Disclosure and Materiality Decisions

Deciding what to disclose and when, from earnings issues to cyber incidents, turns on materiality judgments the SEC's own reviewers spent careers making.

Internal Investigations

Allegations of accounting fraud, insider trading, or misrepresentation demand internal reviews credible to regulators, and former enforcement staff and prosecutors deliver exactly that credibility.

Compliance and Examinations

Compliance programs, trading surveillance, and registrant obligations are easier to build and test with people who examined them for the government.

Backgrounds

Some of the Securities Backgrounds You'll Find

Members come from across the institutions that police the markets:

SEC Division of Enforcement

The Securities and Exchange Commission's enforcement arm investigates and litigates securities violations. Former staff attorneys and accountants map to investigation response, defense strategy, and settlements.

SEC Corporation Finance

Reviews public-company filings and disclosure. Former staff map to materiality calls, registration questions, and disclosure practice.

DOJ and U.S. Attorney's Offices

Federal prosecutors handle criminal securities fraud alongside the SEC's civil track. Former prosecutors map to parallel-proceedings strategy and trial work.

CFTC

The Commodity Futures Trading Commission polices derivatives and commodities markets. Former staff map to trading cases that cross both regimes.

State Securities Regulators

State regulators run their own registration and enforcement programs. Former state securities officials map to multistate exposure and state-law claims.

Federal Judiciary

Former federal judges and law clerks map to case evaluation, mock exercises, and dispositive-motion strategy in securities litigation.

Why It Matters

The Inside Vantage Point

Securities enforcement runs on judgment: what the staff treats as cooperation, what a jury will make of a trading pattern, what a judge expects from a disclosure. Browse the ranked professionals above and reach out directly to the background that fits your matter.

FAQs

Working With These Professionals

What does government experience add in a securities matter?

Enforcement outcomes turn on staff discretion: what gets charged, what settles, and on what terms. People who exercised that discretion read your situation the way the government will.

Can I bring someone in before there's an investigation?

Yes. Disclosure reviews, compliance assessments, and trading-surveillance checks before any inquiry are a large share of what these professionals do.

How do I choose the right background?

Match the institution you face: SEC inquiries point to former enforcement staff; criminal exposure points to former prosecutors; class actions point to former judges and litigators; disclosure questions point to Corporation Finance alumni.

Can these professionals serve as expert witnesses?

Many do, testifying on market practice, disclosure standards, and regulatory process with credibility earned inside the institutions whose expectations are in question.

Is this only for public companies?

No. Founders facing their first SEC inquiry, funds building compliance programs, and counsel needing an independent view all engage through the directory. Scope and terms are agreed directly with the person you contact.

How do I engage someone listed here?

Profiles link directly to each member's contact details, with no intermediary and no fee. Reach out to the person whose background matches your situation.

Join Former Gov

Worked in Securities Enforcement?

Organizations searching this page are looking for exactly your background. Join the directory so they can find you directly.

Join Today