About the Office of Air and Radiation | US EPA
Source: https://www.epa.gov/aboutepa/about-office-air-and-radiation-oar
Archived: 2026-04-23 15:19
About the Office of Air and Radiation | US EPA
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About the Office of Air and Radiation
What We Do
Related Information
Contact OAR
Organization chart
Your Air Quality
Your UV Index
National Vehicle and Fuel Emissions Laboratory
The Office of Air and Radiation develops national programs, policies, and regulations for controlling air pollution and radiation exposure. OAR handles issues related to:
Acid rain
Indoor and outdoor air quality
Air pollution from stationary sources
Pollution from vehicles and engines
Radiation protection
Radon
Stratospheric ozone depletion
OAR is responsible for administering the
Clean Air Act
, the
Atomic Energy Act
, the
Waste Isolation Pilot Plant Land Withdrawal Act
, the
American Innovation and Manufacturing Act
,
Infrastructure Investment and Jobs Act
and other applicable environmental laws and programs.
Phone:
(202) 564-7400 |
EPA mailing addresses
|
Mail code: 6103A
Leadership
News Releases and Media Contacts
All OAR news releases
Find media contacts
Aaron Szabo, Assistant Administrator
Abigale Tardif, Principal Deputy Assistant Administrator
Betsy Shaw,
Deputy Assistant Administrator for Management
Alexander Dominguez, Deputy Assistant Administrator for Mobile Sources
Katie Mills, Deputy Assistant Administrator for
Permitting and Regional Matters
Pat Childers, Senior Tribal Program Coordinator
Organization
Office of
Human Capital Management (OHCM)
OHCM focuses on:
Training and organizational development
Workforce planning
Performance management
Recruitment and outreach
Pay and leave administration
Personnel security
Facilities management
OHCM Organization
Pamela Christian, Director
Phone: (202)
564 - 3196
OHCM includes:
Recruitment and Operations Division
Laycee Kent, Director
Phone: (
202) 564 - 2140
Office of
Program Management Operations (OPMO)
OPMO
manages and oversees business operations, including
:
Oversight and business operations
Strategic and annual planning
Performance measurement
Budget development and execution
Information management
Acquisition of grants and contracts
Financial management
Oversight and audit coordination
Records and property management
Travel and visitor coordination
C
ontinuous improvement
OPMO Organization
Courtney Hyde, Director
Phone: (202) 564 - 1227
Michael Wolfe, Deputy Director
Phone: (202) 564 - 1295
OPMO includes:
Acquisition Management Division
Tim Roberts, Director
Phone: (202)
564 - 6004
Budget Formulation and Planning Division
Kelly Sigel, Director (Acting)
Phone: (202) 564 - 2331
Budget Execution Division
Steve LaRue, Director
Phone: (202) 557 - 4233
Information Management Division
Daniel Hopkins, Director
Phone: (202) 779 - 3893
Office of
Air Program Support (OAPS)
OAPS focuses on:
Regulatory development and process management
Freedom of Information Act requests
Economics, international, trade and science-related cross-cutting issues
Continuous improvement and evaluation
Tribal engagement
Congressional engagement
Communications
Correspondence
Continuous improvement
OAPS Organization
John Shoaff, Director
Phone: (202)
564 - 0531
OAPS includes:
Regulatory Process and Transparency Division
Jonathan Lubetsky, Director
Phone: (202)
564 - 3166
Cross-Cutting Issues Coordination Division
Vacant, Director
Communications, Correspondence, and Congressional Division
Vacant, Director
Office of Clean Air Programs (OCAP)
OCAP focuses on Clean Air Act and American Innovation and Manufacturing Act regulatory programs, including:
Establishing national emission standards for stationary sources
Setting national standards for ambient air quality
Running market-based programs for sulfur dioxide (SO
2
), nitrogen oxide (NO
x
), ozone depleting substances (ODS) and hydrofluorocarbons (HFC).
Programs and projects managed by OCAP
Stationary source standards:
New Source Performance Standards
National Emission Standards for Hazardous Air Pollutants
Nonhazardous Waste Incineration standards
Volatile Organic Compound Standards for Consumer and Commercial Products
National Ambient Air Quality Standards (NAAQS)
Market-based programs:
Acid rain programs
ODS and HFC programs
Human health, environmental risk, and economic assessments
Multilateral agreements and obligations related to OCAP programs
Regulatory compliance
Stationary source reporting, monitoring, measurement and testing methods
OCAP Organization
Peter Tsirigotis, Director
Phone: (919)
541-5616
Vacant, Deputy Director
OCAP includes:
Impacts and Ambient Standards Division
Erika Sasser, Director
Phone: (919)
541 - 3889
Chemicals, Coatings and Products Division
Cynthia Newberg, Director
Phone:
(202) 343 - 9729
Regulatory Assistance Division
Sharyn Lie, Director
Phone:
(202) 564 - 1092
Industrial Processing and Power Division
Vacant, Director
Natural Resources Division
Vacant, Director
Office of State Air Partnerships (OSAP)
OSAP focuses on establishing and supporting the Clean Air Act's cooperative federalism framework for national air quality management through:
Partnering with EPA's regional offices to provide coordination and support to state, local, and Tribal governments in implementing national ambient air quality standards
, stationary source permitting
and visibility
protection
programs
Encouraging collaboration and integration of
implementation policies and strategies
Programs and projects managed by OSAP
Air emissions analysis
Air quality monitoring
NAAQS
implementation
R
egional haze program (visibility protection)
S
tationary source operating permits program
S
tationary source preconstruction permitting program
Air quality r
egulation,
guidance and
policy
development
Air quality management training for state, local and Tribal air agencies
Data management solutions
Geospatial and modeling technologies
OSAP Organization
Scott Mathias, Director
Phone: (919)
541 - 5310
Rhea Jones, Deputy Director
Phone:
(919) 541 - 2940
Vera Kornylak, Associate Director
Phone: (
919) 541 - 4067
OSAP includes:
Air Quality Assessment Division
Karen Wesson, Director
Phone: (919) 541 - 3515
Air Quality Planning Division
Patrick Lessard, Director (Acting)
Phone: (919) 541 - 5383
Permitting and Program Support Division
P
aul Almodovar
, Director (Acting)
Phone: (919) 541 - 0283
Information Management Division
M
artin Husk
, Director (Acting)
Phone: (919) 541 - 3621
Office of
Transportation and Air Quality (OTAQ)
OTAQ is responsible for
reducing air pollution from mobile sources
by establishing, implementing and ensuring compliance with national emission standards for vehicles, equipment, engines and fuels. OTAQ’s programs address emissions from the range of mobile sources: cars and light trucks, large trucks and buses, farm and construction equipment, lawn and garden equipment, marine engines, aircraft, and locomotives.
OTAQ's primary activities include:
Developing regulations and emissions control programs under Title II of the Clean Air Act
Carrying out regulatory implementation, analysis, and compliance programs to ensure adherence to emission control programs in the mobile source sector
Implementing statutory programs to reduce emissions from the legacy vehicle fleet
OTAQ's
National Vehicle and Fuel Emissions Laboratory
provides OTAQ with emissions testing services in support of rulemakings, certification, enforcement actions, and test procedures development.
OTAQ Organization
Sarah Dunham, Director
Phone:
(202) 564 - 1682
Ben Hengst, Deputy Director
Phone: (202) 564 - 1495
OTAQ includes
:
Transportation Sector Impacts and Standards Division
Bill Charmley, Director
Phone:
(734) 214 - 4466
Implementation, Analysis and Compliance Division
Byron Bunker, Director
Phone:
(734) 214 - 4155
Testing and Advanced Technology Division
David Haugen, Director
Phone:
(734) 214 - 4366
Legacy Emissions Division
Karl Simon, Director
Phone:
(202) 564 - 7918
Office of Radiation and Indoor Air (ORIA)
ORIA’s mission is to protect the public and the environment from the risks of radiation and indoor air pollution. The office coordinates across the agency and with other federal, state, Tribal, and non-governmental organizations to carry out its mission. ORIA develops criteria, standards, guidance, policies, and programs to limit unnecessary radiation exposure and control exposure to indoor air pollutants. The office:
Provides technical assistance to states and Tribes through EPA's regional offices, and to other national and international organizations having radiation and indoor air protection programs
Directs an environmental radiation monitoring program
Responds to radiological emergencies
Evaluates and assesses the overall risk and impact of radiation and indoor air pollution
Programs and projects managed by ORIA
Asthma
Creating Healthy Indoor Air Quality in Schools
EnergyStar
Federal Guidance for Radiation Protection
Indoor Air Quality in Tribal Communities
Indoor Air Quality
Indoor airPLUS
Mold
Radiation
Radiation Regulations and Laws
Radiological Emergency Response
RadNet
Radon
RadTown
Smoke-free Homes
Tribal Support for Radiation Protection
ORIA Organization
Sharon White, Director (Acting)
Phone:
(202) 564 - 5048
Sarah Hoyt, Deputy Director (Acting)
Phone: (202) 566 - 1314
ORIA includes:
Radiation Protection Division
Armin Ansari, Director (Acting)
Phone:
(202) 564 - 0019
Indoor Environments Division
Bill Long, Director (Acting)
Phone: (202) 343 - 9733
National Analytical Radiation Environmental Laboratory
Cynthia White, Director (Acting)
Phone:
(334) 270 -
7052
National Center for Radiation Field Operations
Karen Beckley, Director
Phone:
(702) 278 - 9027
About EPA
Contact EPA
Contact EPA
to ask a question, provide feedback, or report a problem.
Last updated on February 18, 2026
Skip to main content
Official websites use .gov
A
.gov
website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A
lock
(
) or
https://
means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
About the Office of Air and Radiation
What We Do
Related Information
Contact OAR
Organization chart
Your Air Quality
Your UV Index
National Vehicle and Fuel Emissions Laboratory
The Office of Air and Radiation develops national programs, policies, and regulations for controlling air pollution and radiation exposure. OAR handles issues related to:
Acid rain
Indoor and outdoor air quality
Air pollution from stationary sources
Pollution from vehicles and engines
Radiation protection
Radon
Stratospheric ozone depletion
OAR is responsible for administering the
Clean Air Act
, the
Atomic Energy Act
, the
Waste Isolation Pilot Plant Land Withdrawal Act
, the
American Innovation and Manufacturing Act
,
Infrastructure Investment and Jobs Act
and other applicable environmental laws and programs.
Phone:
(202) 564-7400 |
EPA mailing addresses
|
Mail code: 6103A
Leadership
News Releases and Media Contacts
All OAR news releases
Find media contacts
Aaron Szabo, Assistant Administrator
Abigale Tardif, Principal Deputy Assistant Administrator
Betsy Shaw,
Deputy Assistant Administrator for Management
Alexander Dominguez, Deputy Assistant Administrator for Mobile Sources
Katie Mills, Deputy Assistant Administrator for
Permitting and Regional Matters
Pat Childers, Senior Tribal Program Coordinator
Organization
Office of
Human Capital Management (OHCM)
OHCM focuses on:
Training and organizational development
Workforce planning
Performance management
Recruitment and outreach
Pay and leave administration
Personnel security
Facilities management
OHCM Organization
Pamela Christian, Director
Phone: (202)
564 - 3196
OHCM includes:
Recruitment and Operations Division
Laycee Kent, Director
Phone: (
202) 564 - 2140
Office of
Program Management Operations (OPMO)
OPMO
manages and oversees business operations, including
:
Oversight and business operations
Strategic and annual planning
Performance measurement
Budget development and execution
Information management
Acquisition of grants and contracts
Financial management
Oversight and audit coordination
Records and property management
Travel and visitor coordination
C
ontinuous improvement
OPMO Organization
Courtney Hyde, Director
Phone: (202) 564 - 1227
Michael Wolfe, Deputy Director
Phone: (202) 564 - 1295
OPMO includes:
Acquisition Management Division
Tim Roberts, Director
Phone: (202)
564 - 6004
Budget Formulation and Planning Division
Kelly Sigel, Director (Acting)
Phone: (202) 564 - 2331
Budget Execution Division
Steve LaRue, Director
Phone: (202) 557 - 4233
Information Management Division
Daniel Hopkins, Director
Phone: (202) 779 - 3893
Office of
Air Program Support (OAPS)
OAPS focuses on:
Regulatory development and process management
Freedom of Information Act requests
Economics, international, trade and science-related cross-cutting issues
Continuous improvement and evaluation
Tribal engagement
Congressional engagement
Communications
Correspondence
Continuous improvement
OAPS Organization
John Shoaff, Director
Phone: (202)
564 - 0531
OAPS includes:
Regulatory Process and Transparency Division
Jonathan Lubetsky, Director
Phone: (202)
564 - 3166
Cross-Cutting Issues Coordination Division
Vacant, Director
Communications, Correspondence, and Congressional Division
Vacant, Director
Office of Clean Air Programs (OCAP)
OCAP focuses on Clean Air Act and American Innovation and Manufacturing Act regulatory programs, including:
Establishing national emission standards for stationary sources
Setting national standards for ambient air quality
Running market-based programs for sulfur dioxide (SO
2
), nitrogen oxide (NO
x
), ozone depleting substances (ODS) and hydrofluorocarbons (HFC).
Programs and projects managed by OCAP
Stationary source standards:
New Source Performance Standards
National Emission Standards for Hazardous Air Pollutants
Nonhazardous Waste Incineration standards
Volatile Organic Compound Standards for Consumer and Commercial Products
National Ambient Air Quality Standards (NAAQS)
Market-based programs:
Acid rain programs
ODS and HFC programs
Human health, environmental risk, and economic assessments
Multilateral agreements and obligations related to OCAP programs
Regulatory compliance
Stationary source reporting, monitoring, measurement and testing methods
OCAP Organization
Peter Tsirigotis, Director
Phone: (919)
541-5616
Vacant, Deputy Director
OCAP includes:
Impacts and Ambient Standards Division
Erika Sasser, Director
Phone: (919)
541 - 3889
Chemicals, Coatings and Products Division
Cynthia Newberg, Director
Phone:
(202) 343 - 9729
Regulatory Assistance Division
Sharyn Lie, Director
Phone:
(202) 564 - 1092
Industrial Processing and Power Division
Vacant, Director
Natural Resources Division
Vacant, Director
Office of State Air Partnerships (OSAP)
OSAP focuses on establishing and supporting the Clean Air Act's cooperative federalism framework for national air quality management through:
Partnering with EPA's regional offices to provide coordination and support to state, local, and Tribal governments in implementing national ambient air quality standards
, stationary source permitting
and visibility
protection
programs
Encouraging collaboration and integration of
implementation policies and strategies
Programs and projects managed by OSAP
Air emissions analysis
Air quality monitoring
NAAQS
implementation
R
egional haze program (visibility protection)
S
tationary source operating permits program
S
tationary source preconstruction permitting program
Air quality r
egulation,
guidance and
policy
development
Air quality management training for state, local and Tribal air agencies
Data management solutions
Geospatial and modeling technologies
OSAP Organization
Scott Mathias, Director
Phone: (919)
541 - 5310
Rhea Jones, Deputy Director
Phone:
(919) 541 - 2940
Vera Kornylak, Associate Director
Phone: (
919) 541 - 4067
OSAP includes:
Air Quality Assessment Division
Karen Wesson, Director
Phone: (919) 541 - 3515
Air Quality Planning Division
Patrick Lessard, Director (Acting)
Phone: (919) 541 - 5383
Permitting and Program Support Division
P
aul Almodovar
, Director (Acting)
Phone: (919) 541 - 0283
Information Management Division
M
artin Husk
, Director (Acting)
Phone: (919) 541 - 3621
Office of
Transportation and Air Quality (OTAQ)
OTAQ is responsible for
reducing air pollution from mobile sources
by establishing, implementing and ensuring compliance with national emission standards for vehicles, equipment, engines and fuels. OTAQ’s programs address emissions from the range of mobile sources: cars and light trucks, large trucks and buses, farm and construction equipment, lawn and garden equipment, marine engines, aircraft, and locomotives.
OTAQ's primary activities include:
Developing regulations and emissions control programs under Title II of the Clean Air Act
Carrying out regulatory implementation, analysis, and compliance programs to ensure adherence to emission control programs in the mobile source sector
Implementing statutory programs to reduce emissions from the legacy vehicle fleet
OTAQ's
National Vehicle and Fuel Emissions Laboratory
provides OTAQ with emissions testing services in support of rulemakings, certification, enforcement actions, and test procedures development.
OTAQ Organization
Sarah Dunham, Director
Phone:
(202) 564 - 1682
Ben Hengst, Deputy Director
Phone: (202) 564 - 1495
OTAQ includes
:
Transportation Sector Impacts and Standards Division
Bill Charmley, Director
Phone:
(734) 214 - 4466
Implementation, Analysis and Compliance Division
Byron Bunker, Director
Phone:
(734) 214 - 4155
Testing and Advanced Technology Division
David Haugen, Director
Phone:
(734) 214 - 4366
Legacy Emissions Division
Karl Simon, Director
Phone:
(202) 564 - 7918
Office of Radiation and Indoor Air (ORIA)
ORIA’s mission is to protect the public and the environment from the risks of radiation and indoor air pollution. The office coordinates across the agency and with other federal, state, Tribal, and non-governmental organizations to carry out its mission. ORIA develops criteria, standards, guidance, policies, and programs to limit unnecessary radiation exposure and control exposure to indoor air pollutants. The office:
Provides technical assistance to states and Tribes through EPA's regional offices, and to other national and international organizations having radiation and indoor air protection programs
Directs an environmental radiation monitoring program
Responds to radiological emergencies
Evaluates and assesses the overall risk and impact of radiation and indoor air pollution
Programs and projects managed by ORIA
Asthma
Creating Healthy Indoor Air Quality in Schools
EnergyStar
Federal Guidance for Radiation Protection
Indoor Air Quality in Tribal Communities
Indoor Air Quality
Indoor airPLUS
Mold
Radiation
Radiation Regulations and Laws
Radiological Emergency Response
RadNet
Radon
RadTown
Smoke-free Homes
Tribal Support for Radiation Protection
ORIA Organization
Sharon White, Director (Acting)
Phone:
(202) 564 - 5048
Sarah Hoyt, Deputy Director (Acting)
Phone: (202) 566 - 1314
ORIA includes:
Radiation Protection Division
Armin Ansari, Director (Acting)
Phone:
(202) 564 - 0019
Indoor Environments Division
Bill Long, Director (Acting)
Phone: (202) 343 - 9733
National Analytical Radiation Environmental Laboratory
Cynthia White, Director (Acting)
Phone:
(334) 270 -
7052
National Center for Radiation Field Operations
Karen Beckley, Director
Phone:
(702) 278 - 9027
About EPA
Contact EPA
Contact EPA
to ask a question, provide feedback, or report a problem.
Last updated on February 18, 2026