Office of the General Counsel | Homeland Security
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Office of the General Counsel

The Office of the General Counsel (OGC) has over 3,000 dedicated attorneys at headquarters and operating components.

The Homeland Security Act defines the General Counsel as the chief legal officer of the Department. In this role, the General Counsel is ultimately responsible for all the Department's legal determinations and for overseeing all its attorneys. The General Counsel is also the Department's regulatory policy officer, managing the rulemaking program and ensuring that all Department of Homeland Security regulatory actions comply with relevant statutes and executive orders.

The General Counsel (acting) is Joseph N. Mazzara.

The Office of the General Counsel:

  • provides complete, accurate, and timely legal advice on possible courses of action for the Department;
  • ensuring that Homeland Security policies are implemented lawfully, quickly, and efficiently;
  • protecting the rights and liberties of any Americans who come in contact with the Department;
  • facilitating quick responses to congressional requests for information; and
  • representing the Department in venues across the country, including in U.S. immigration courts.

For service of process, by mail only:

Office of the General Counsel
U.S. Department of Homeland Security
245 Murray Lane, SW
Mail Stop 0485
Washington, DC 20528-0485

For petitions for rulemaking, by mail only:

Attn: Regulatory Affairs Law Division
Office of the General Counsel
U.S. Department of Homeland Security
245 Murray Lane, SW
Mail Stop 0485
Washington, DC 20528-0485

NOTE: DHS regulations at 6 CFR part 3 describe the rulemaking petition process in more detail, and include additional requirements and information related to the proper format, mailing, and content of a rulemaking petition. For example, DHS accepts rulemaking petitions by mail only; DHS does not accept rulemaking petitions delivered by email message, fax, or courier.

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Last Updated: 02/06/2025
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