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About the Office of International and Tribal Affairs (OITA)

Related Information
  • Contact OITA
  • Organization chart
  • Environmental Protection in Indian Country
  • International Cooperation
  • International visitors to EPA
  • Resources for International Users

What We Do

EPA's Office of International and Tribal Affairs (OITA) leads EPA’s international and tribal engagements, working across EPA’s programs and regions to develop and implement policy and programs that protect U.S. public health and the environment. 

Because pollution does not respect international boundaries, OITA works with other federal agencies and international organizations and individual countries to address bilateral, regional, and global environmental challenges and advance U.S. foreign policy objectives.   

Honoring the government-to-government relationship and respecting tribal treaty rights, OITA guides the Agency-wide effort to strengthen public health and environmental protection in Indian country, with a special emphasis on helping tribes administer their own environmental programs.


Organization

Vacant, Assistant Administrator 
 
Victoria Tran, Principal Deputy Assistant Administrator
  • Phone: 202-564-7002
  • Email: tran.victoria@epa.gov
  • Mail code: 2610R | EPA mailing addresses
Rafael DeLeon, Deputy Assistant Administrator for Management
  • Phone: 202-564-4899
  • Email: deleon.rafael@epa.gov
  • Mail code: 2610R | EPA mailing addresses
Martin Dieu, Chief of Staff
  • Phone: 202-564-6600
  • Email: dieu.martin@epa.gov 
  • Mail code: 2610R | EPA mailing addresses
The Office of International and Tribal Affairs includes:
  • American Indian Environmental Office
  • Office of International Affairs
  • Office of Management and International Services

American Indian Environmental Office (AIEO)

Related Information
  • Contact AIEO
  • Tribal Program Managers
  • Members of the National Tribal Caucus

What We Do

The American Indian Environmental Office leads EPA's efforts to protect human health and the environment of federally recognized Tribes by supporting implementation of federal environmental laws consistent with the federal trust responsibility, the government-to-government relationship, and EPA's 1984 Indian Policy.

Programs and Projects Managed by AIEO

  • Environmental Protection in Indian Country
  • Indian Environmental General Assistance Program (GAP)
  • Laws, regulations and policies that affect tribes
  • Consultation with tribes

Mail code: 2690M | EPA mailing addresses

Location: EPA Headquarters at Washington, D.C. Federal Triangle campus

AIEO Organization

Lisa Berrios, Acting Director

  • Phone: 202-564-1739
  • Email: berrios.lisa@epa.gov

Felicia Wright, Deputy Director

  • Phone: 202-566-1886
  • Email: wright.felicia@epa.gov

The American Indian Environmental Office includes:

  • Planning and Communications
    Jeff Besougloff, Senior Advisor
    • Phone: 202-564-0292
    • Email: besougloff.jeff@epa.gov
  • Policy and Partnership 
    Andy Byrne, Senior Advisor
    • Phone: 202-564-3836
    • Email: byrne.andrew@epa.gov
  • Tribal Capacity Development
    Lisa Berrios, Senior Advisor
    • Phone: 202-564-1739
    • Email: berrios.lisa@epa.gov


Office of International Affairs (OIA)

What We Do

The Office of International Affairs (OIA) provides policy and programmatic expertise for matters of environmental and geopolitical importance to the U.S. OIA serves as the Agency’s primary point of contact with government officials and environmental experts in priority countries and regions, and key international organizations such as the United Nations, and develops Agency-wide strategies for international initiatives. At the multilateral level, OIA leads EPA's work addressing domestic environmental aspects of international instruments, such as trade, finance, and investment agreements, and represents the U.S. in international negotiations.

Mail code: 2650R | EPA mailing addresses

Location: EPA Headquarters at Washington, D.C. Federal Triangle campus

OIA Organization

Mark Kasman, Director

  • Phone: 202-564-6400
  • Email: kasman.mark@epa.gov

Hodayah Finman, Deputy Director

  • Phone: 202-564-6600
  • Email: finman.hodayah@epa.gov

Monisha Harris, Deputy Director

  • Phone: 202-564-6600
  • Email: harris.monisha@epa.gov

The Office of International Affairs includes:

  • Asia/Pacific and Europe Program (APEP)
    Krystal Krejcik, Acting Senior Advisor
    • Phone: 202-564-6600
    • Email: krejcik.krystal@epa.gov
  • Middle East, Latin America, Africa and Caribbean Program (MLAC)
    Cam Hill-Macon, Senior Advisor
    • Phone: 202-564-6600
    • Email: hill-macon.cam@epa.gov
  • North America Program (NAP)
    Dr. Lesley D’Anglada, Senior Advisor
    • Phone: 202-564-6600
    • Email: danglada.lesley@epa.gov
  • Environmental Media Program (EMP)
    Toni Harmer, Senior Advisor​
    • Phone: 202-564-6600
    • Email: harmer.toni@epa.gov
       
  • International Organizations Program (IOP)
    Patrick Huber, Acting Senior Advisor
    • Phone: 202-564-6600
    • Email: huber.patrick@epa.gov
  • Trade and Economic Program (TEP)
    Brianna Besch, Senior Advisor
    • Phone: 564-8821
    • Email: besch.brianna@epa.gov

Office of Management and International Services (OMIS)

What We Do

The Office of Management and International Services (OMIS) is responsible for providing the full range of necessary management and administrative functions that support the Agency’s international programs and coordinates cross-cutting administrative support services. OMIS manages OITA’s resources to ensure effective use and development of staff, high productivity, cost-efficient operations, and support of the Agency’s environmental goals. OMIS provides expertise in strategic planning, budget formulation and execution, human resources, contracts and grants, and ethics for OITA. OMIS also coordinates the International Visitors Program for EPA.

Programs and Projects Managed by the Office of Management and International Services

  • International Visitors Program
  • Grants and Cooperative Agreements

Mail code: 2680R | EPA mailing addresses

Location: EPA Headquarters at Washington, D.C. Federal Triangle campus

OMIS Organization

Vickie Richardson, Office Director

  • Phone: 202-564-3873
  • Email: richardson.vickie@epa.gov

Jonah Richmond, Deputy Office Director

  • Phone: 202-564-0210
  • Email: richmond.jonah@epa.gov

The Office of Management and International Services includes:

  • Budget and Resources Management Program
  • Administrative Management Program
  • International Travel Office

About EPA

  • Our Mission and What We Do
  • Headquarters Offices
  • Regional Offices
  • Labs and Research Centers
  • EPA Organization Chart
  • EPA History
Contact EPA
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Last updated on April 25, 2025
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