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Mark Bass
Partner
Corporate
Washington, D.C.

D202-973-8826

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Mark Bass is a partner in the Washington, D.C., office of Wilson Sonsini Goodrich & Rosati, where he works with public and private technology companies at all stages of growth. He also represents venture capital funds, private equity firms, and investment banks in financings and public offerings. 

Mark's practice focuses on corporate and securities law (including general corporate representation), public offerings, public and private mergers and acquisitions, and private equity and venture capital financings. He has significant capital markets experience, representing issuers and underwriters in initial public offerings and follow-on public offerings. Mark also counsels public companies on public disclosures and compliance with SEC and exchange rules.

In addition, Mark counsels clients on U.S. government matters. He assists companies with compliance with federal regulations, obtaining and maintaining security clearances to perform work on classified contracts, and issues arising from changes of control with mergers and acquisitions.

Prior to law school, Mark worked at the U.S. Department of Justice and U.S. Department of Homeland Security.

Experience

Mark Bass is a partner in the Washington, D.C., office of Wilson Sonsini Goodrich & Rosati, where he works with public and private technology companies at all stages of growth. He also represents venture capital funds, private equity firms, and investment banks in financings and public offerings. 

Mark's practice focuses on corporate and securities law (including general corporate representation), public offerings, public and private mergers and acquisitions, and private equity and venture capital financings. He has significant capital markets experience, representing issuers and underwriters in initial public offerings and follow-on public offerings. Mark also counsels public companies on public disclosures and compliance with SEC and exchange rules.

In addition, Mark counsels clients on U.S. government matters. He assists companies with compliance with federal regulations, obtaining and maintaining security clearances to perform work on classified contracts, and issues arising from changes of control with mergers and acquisitions.

Prior to law school, Mark worked at the U.S. Department of Justice and U.S. Department of Homeland Security.

Focus Areas
Recent Insights
Alerts
Proposed Department of Defense Rule Requires FOCI Mitigation for Unclassified Contracts Valued at More than $5 Million
On May 7, 2026, the Department of Defense (DoD) proposed changes to the Defense Federal Acquisition Regulation Supplement (DFARS) that, when finalized, will impact nearly 38,000 defense contractors and subcontractors. The proposed changes will require companies to disclose foreign ownership, control, or influence (FOCI), which they must mitigate before the contracting officer can award, modify, or extend a contract.
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Client Advisories
SBIR and STTR Contracts: Not for Just Any Small Business
On April 13, 2026, President Trump signed into law the Small Business Innovation and Economic Security Act, reauthorizing the Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) programs. See our prior alert here. Because of the significance of these programs to small businesses and their ability to sell new and innovative solutions to the federal government, here is a refresher on some of the rules small companies should be aware of before applying for an SBIR or STTR contract.
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Recent Events
Affiliated Programs
Capital Capital Dual Use Conference: Investing in Dual Use - What Are VCs Looking For?
Wilson Sonsini is proud to sponsor Capital Capital Dual Use, the biggest annual convention in the D.C. region of Dual Use Technology entrepreneurs, high-growth company executives, venture investors, and the advisors and professional services that support this community.
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Speaking Engagements
Dcode Chat: FOCI Foundations & Strategy – with Wilson Sonsini
Want to crack the code on securing federal revenue while navigating FOCI regulations? Join us on July 11th from 2-3pm ET for FOCI Foundations & Strategy with experts from Wilson Sonsini Goodrich & Rosati.
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