Costin Marcus PLLC
When the stakes are high, clients turn to Costin Marcus
About Us
With decades of trial experience, we bring strategic foresight, precision, and courtroom credibility to every matter.
Costin Marcus PLLC is a leading commercial litigation boutique in Northern Virginia—trusted by companies, business owners, and executives facing high-stakes business disputes.
Clients turn to us when control of a business, significant money, or competitive advantage is at stake, or when a competitor, customer, employee, or business partner has violated a contract or broken the law. Many of our cases are litigated in federal and state courts across Virginia—including the “Rocket Docket” of the U.S. District Court for the Eastern District of Virginia and the Circuit Courts of Fairfax County and the City of Alexandria. We also frequently represent companies, business owners, and corporate executives in courts throughout the greater Washington, D.C. region, as well as in arbitrations and mediations nationwide.
high stakes matters we tackle For Our Clients
Complex Civil Litigation: High stakes matters requiring sophisticated motion practice, discovery strategy, trial readiness, and trial.
Business & Partnership Disputes: Ownership conflicts, control disputes, breaches of fiduciary duty.
Contract & Commercial Disputes: Breach of contract, enforcement actions, disputes with customers, competitors, or vendors.
Trade Secrets & Unfair Competition: Misappropriation, restrictive covenants, non-competes, business interference claims.
Corporate Governance & Internal Investigations: Disputes involving company management, decision-making authority, and internal conflicts.
Executive Employment-Related Litigation: Executive disputes, contract issues, misconduct and separation matters.
Federal Court Litigation: Eastern District of Virginia (EDVA) expertise, fast-paced case management, and trial preparation under accelerated timelines.
Arbitration & Mediation: Confidential business disputes, multi-party conflicts.
Appeals & Post-Trial Strategy: Appellate briefing and advocacy following trial court decisions.