Staff

The Board of Directors employs and directs Association support and management activities to the ASTSWMO Executive Director who conducts the day-to-day business of the Association and Board of Directors, ensures adequate resources are planned and requested for the support of all ASTSWMO activities, and is responsible for maintaining the Association’s fiscal integrity. The Executive Director is also responsible for managing and assigning other employed staff members who support each Subcommittee program, their teams, and other ASTSWMO initiatives.

Dania Rodriguez

Executive Director

Board of Directors and Administration

(202) 870-1602

Max Burrows

Program Manager

Federal Facilities Subcommittee

Materials Management Subcommittee

(410) 705-4085

Anna Gayle Griffiths

Program Manager

Tanks Subcommittee

Hazardous Waste Subcommittee

(501) 425-8330

Sam Puffenbarger

Senior Program Manager

CERCLA and Brownfields Subcommittee

CEC Steering Committee

(202) 341-3689

T.J. Gannon

Web & Technology Specialist

(941) 993-6428

Maria Warner

Accounts Administrator

(240) 472-9465

Since 2013, Dania Rodriguez has been the Executive Director of the Association of State and Territorial Solid Waste Management Officials (ASTSWMO) in Washington, DC. She has over two decades of demonstrated national environmental experience with expertise in the field of technical, financial and policy development and a comprehensive knowledge of State and Territorial (States) environmental programs.
Prior to her career at ASTSWMO, Dania worked for the American Petroleum Institute (API). Dania received a B.A. in Political Science from Hood College in Frederick, Maryland, and an Executive Certificate in Nonprofit Management from the Georgetown University, McCourt School of Public Policy. Dania enjoys spending time with her family and dogs, traveling, good food and wine, and being an advocate for the environment and the ASTSWMO membership.
Max Burrows is from New Jersey and received a B.A. in Political Science from Dickinson College in 2019 where he was an active member of the College and surrounding local community. He has a background in education and curriculum development. He is passionate about exploring new ways to create a cleaner future for generations to come through policy and advocacy. Max lives in Washington, DC and likes to keep active through cycling and soccer. He also picked up chess during the Pandemic and has yet to put it down.
Kerry Callahan is a Senior Program Manager with the Association of State and Territorial Solid Waste Management Officials (ASTSWMO) in Washington, D.C. She staffs the Hazardous Waste and Materials Management Subcommittees and their Task Forces. She has a B.A. in Political Science from American University and a Master’s in Public Policy from Georgetown University. Kerry enjoys living in Washington, D.C.
Sam Puffenbarger rejoined ASTSWMO in November 2022 as the CERCLA and Brownfields Program Manager. Sam has over 10 years of combined environmental experience. Before working at ASTSWMO he spent time at FEMA doing GIS disaster mapping and before that worked on the National Flood Insurance Program at a private engineering firm. Sam has a B.S. from West Virginia University in Psychology and an M.P.A in Environmental Science and Policy from George Mason University. Before his return to ASTSWMO, Sam spent 8 years in the craft beer industry eventually ending up as a head brewer in the DC area. When Sam is not at work he and his wife enjoy hanging with their dogs, going to shows, talking beer and biking around the city.
Anna Gayle is an Arkansas native who joined the ASTSMWO staff in January 2025. Before joining the team, she worked as a geologist for the Arkansas Department of Energy and Environment. She began at ADEE in 2021 after obtaining her bachelor’s in geology at the University of Arkansas at Little Rock. At ADEE, AG worked primarily in RCRA Corrective Action, but also dabbled in legal orders, solid waste, brownfields, and DERP. AG is a Geologist- In-Training and loves all things rocks but is excited to be in a more policy-forward role. In her spare time, AG plays tennis, goes camping, roots for the Hogs and the Vikings, and makes friendship bracelets. Her favorite mineral is wavellite. If you see her at an ASTSWMO meeting- ask her about Taylor Swift, Harry Styles, or anything Arkansas related. You’ll have a friend for life!
TJ joined the ASTSWMO Team in May 2017. Hailing from Florida where he received a B.A. in Digital Media from the University of Central Florida, TJ handles everything from web design and development to audio and visual needs at ASTSWMO conferences.
In his free time TJ enjoys the DC bar scene with his fellow UCF alumni and trivia friends, and quiet nights at home watching movies and playing videogames with his wife Sarah.
Maria Warner has been the Accounts Administrator for ASTSWMO for the past 4 years in the Washington, DC office. She has over 17 years of demonstrated experience as a bookkeeper and office administrator. Prior to joining ASTSWMO Maria was the bookkeeper for a financial management firm and an air quality control company.
Maria received her B.S. in Finance with a minor in Management Information Systems/ Decision Support Systems from the University of Delaware. Upon graduation, Maria worked for Booz Allen & Hamilton as a database design and software developer. She took time off to raise her 3 beautiful children, then rejoined the work force as a bookkeeper. In her spare time, she loves spending time with her family, especially at the east coast beaches. She’s also a recreational (slow and not many miles) runner who dabbles in a few 5ks to stay goal oriented.