Cassidy Law

Innovative Businesses

Deserve Bold Legal Representation

Practical legal counsel, entrepreneurial spirit, and business insight for companies navigating federal government contracting, export controls, national security, and defending government investigations and audits.

Selling to the U.S. Federal Government

Simplified and Actionable

Small Business and Startups

Turning Innovation Into Opportunities

Intellectual Property

Securing the Innovation Behind Your Mission

National Security Compliance

Safeguarding the Information You’re Entrusted With

Working With Investors and Business Partners

Their Business Is Your Risk And Your Opportunity

Working Internationally

Building Globally, Operating Compliantly

Mediation and Independent Monitoring

Experience, Oversight, Objectivity

Investigations and Audits

Defending What You Have Built

Our Approach

We provide legal advice on federal government contracting, international operations, working with business partners and investors, and securing intellectual property. We also defend businesses in government audits and investigations as well as support internal investigations.

In doing so, we practice law the way our clients build businesses: with focus, discipline, and a bias for action. Our legal counsel evolves with your strategy and risk profile. It’s grounded in common sense—not legal complexity for its own sake.

Having worked with companies from global organizations to two-person startups, we know first-hand the pressures of growth, limited resources, and constant decision-making. That’s why we collaborate with business teams and listen to learn what you’re building, how you operate, and where you want to go. This perspective shapes how we work with founders, executives, investors, and other lawyers: delivering clear, actionable advice that informs decisions and manages risk. And when challenges go beyond law, we turn to our network of professionals to support your situation.

Mission-critical legal insight for those building the future of defense.

The Defense Salon is a legal and policy-focused resource that provides insights on navigating evolving U.S. national security, export control, and acquisition laws so businesses can scale and innovate while managing legal and geopolitical risk.

Who We Are

Cassidy Law has a track record of building successful, long-lasting relationships based on candor, empathy, and integrity. When you work with us, you work with a firm that not only understands the law, but that speaks the language of business, helping you understand the law and how it integrates with your strategy and day-to-day operations.

Whether your business is looking to work with the federal government, scale globally, partner with primes, subcontractors, and investors, or manage intellectual property, Cassidy Law can help. From defending you in government investigations to developing contracts and ethics and compliance strategies that mitigate risk, we deliver practical counsel that considers your strategy.

Recent News

Cassidy Law to Sponsor the Federal Bar Association’s Qui Tam Conference in DC

Our own Lynne Halbrooks will be speaking on a panel that will discuss the False Claims Act and federal government contracting.

Margaret to present at 8th National Forum on Foreign, Ownership, Control and Interest (FOCI).

The American Conference Institute generously invited Margaret to present at its 8th National Forum on Foreign, Ownership, Control and Interest (FOCI). Margaret’s topic...

AFC in Practice – Export Controls Ep.2: Lifting the Veil on Global Trade Risks

Margaret presented for ACAMS, the Association of Certified Anti-Moneylaundering Specialists on identifying red flags related to Russia, Iran, North Korea and China access...