Hannah Marie Peters-Edwards

Hannah Marie provides insights to clients in agriculture and rural development, life sciences, and transportation, tracking legislative and agency developments and assisting clients with their individual requests. This includes federal agencies such as the United States Department of Agriculture (USDA), Department of Energy – Office of Science (DOE-Sc), the National Science Foundation (NSF), and Department of Commerce, among others.  Hannah Marie’s background in agriculture has allowed her to have a unique perspective on all aspects of this issue.  This has allowed Hannah Marie to work with clients and agencies to provide more sustainable and innovative practices in agriculture and life sciences.


Issue Areas: Agriculture, Life Science, Biological Science, Economic Development, Rural Development, Transportation, and Infrastructure.


Additional Information: Prior to joining Lewis-Burke Associates, Hannah Marie worked on the Hill as an intern in the House of Representatives.  Her background in agriculture has been developed from 13 years in 4-H, and 4 years in Future Farmers of America (FFA).   She raised Animals for breeding as well as market; and her family has worked with both walnuts and almonds.  She worked as a Program Assistant for the National 4-H Council in 2018 where she focused on teaching middle to high school students about the United States Government and leadership development.


Vital Statistics: Hannah Marie grew up in Durham, California. She attended Butte Community College, where she obtained her Associates degree in political science.  While at Butte College she served as the student government president, and a member of the Butte College golf team.  In 2020, she transferred to the University of California, Berkeley where she graduated with a bachelor’s in arts in Political Science with a specialization in American Government.  While at UC Berkeley she was the chair of the Associated Students of the University of California Judicial Council. Outside of the office Hannah enjoys going out and trying new restaurants and exploring the outdoors by hiking and taking long walks with friends.

Elizabeth Stulberg, Ph.D.

Dr. Elizabeth Stulberg advises clients in the areas of food, agriculture, and life sciences. Elizabeth has worked in Congress, the White House, and the U.S. Department of Agriculture and holds an ScB in Biology and German Studies from Brown University and a PhD in Molecular, Cellular, and Developmental Biology from Yale University. Elizabeth uses her deep subject matter expertise and broad experience working within the federal landscape to advocate for science, leverage federal programs, and enhance clients’ scientific and technological endeavors. 

Before joining Lewis-Burke Associates, she spent five years as a Science Policy Manager for the Agronomy, Crop, and Soil Science Societies of America. In this role, she supported food, agriculture, and natural resources research programs. On one occasion, she facilitated a campaign that brought students and scientists to Capitol Hill to advocate for specific funding for agriculture equipment grants, an effort that resulted in a new, $5 million program in the 2018 Farm Bill.

Issue Expertise: Food and agriculture policy, microbiome science, higher education, plant and soil science, genetics and biotechnology.

Additional Experience: Elizabeth started her career in science policy with an American Association for the Advancement of Science (AAAS) Congressional Science Policy Fellowship supported by the American Society for Microbiology. As a Fellow, she worked in the office of Congresswoman Louise Slaughter of Rochester, New York, where she advised on issues of agriculture, public health, genetics, and food safety. She then moved into the White House Office of Science and Technology Policy with a fellowship from the American Phytopathological Society, leading initiatives on microbiome science and agriculture workforce development and earning the position of Senior Advisor for Food and Life Sciences. Elizabeth gained agency experience as an Agricultural Science Fellow in the U.S. Department of Agriculture’s Office of the Chief Scientist before spending five years with the Agronomy, Crop, and Soil Science Societies of America. 

Vital Statistics: Elizabeth lives in Northeast Washington, DC with her husband and two beautiful children. She has a passion for food, both cooking and eating, and is thrilled that her career lets her dive deeply into issues dealing with the food system, from plant biodiversity to nutritional inequities. She also loves snowboarding and science fiction.

Nzinga Dyson, J.D.

At Lewis-Burke, Nzinga uses her comprehensive knowledge of the inner-workings of Capitol Hill to advise and support clients with their national security and environmental research- related government relations needs. She also advises clients on upcoming research opportunities and strategies to engage Federal research agencies and Capitol Hill.

Before joining Lewis-Burke, Nzinga served as Legislative Counsel at the U.S. House of Representatives’ Committee on Homeland Security, where she advised Members of Congress and Committee leadership on legislative and oversight matters that pertained to the administration of the Federal Emergency Management Agency (FEMA), within the Department of Homeland Security (DHS).

While at the U.S. House of Representatives’ Committee on Homeland Security, Nzinga was primarily responsible for the Committee’s work surrounding the DHS preparedness grant programs and emergency communications. Nzinga also monitored FEMA’s response and recovery efforts associated with disasters, including hurricanes, earthquakes, wildfires, and recently, the COVID-19 pandemic. Most notably, Nzinga was instrumental in the passage of the Securing American Nonprofit Organizations Against Terrorism Act of 2019, legislation that became law in January 2020.

Issue Areas: Defense, National Security, Homeland Security, Congressional Affairs, Climate Resilience

Additional Expertise: Nzinga also served as Special Assistant to the Chairman at Ian Reid, LLC. There, she provided strategic advice and counsel to the firm’s Chairman and leadership team on public policy related to geo-political issues, research, and current events. She also advised clients with local government issues related to homeland security and public safety.

Vital Statistics: Nzinga is from Fort Washington, Maryland. She received her Bachelor of Arts degree in Political Science from Morgan State University and her Juris Doctorate degree from the North Carolina Central University School of Law. She was admitted to the Maryland Bar in 2013.

Nzinga is also an active member of the Xi Zeta Omega Chapter of Alpha Kappa Alpha Sorority, Incorporated, where she served as Attorney Advisor in 2019, advising the Chapter President and Executive Board members on all legal matters.

Joanna Ratigan

Joanna Ratigan assists Lewis-Burke clients by monitoring environmental and public health legislative developments and funding opportunities from federal agencies, most notably, the National Institutes of Health (NIH), the National Oceanic and Atmospheric Administration (NOAA), the National Science Foundation (NSF), and the Centers for Disease Control and Prevention (CDC). Joanna’s passion for public health and environmental justice, and her experience in health policy, research, and advocacy, allows her to provide thorough insight to clients that integrates multiple issues.

Issue Expertise: Health, agriculture, environment, nutrition, climate, and biomedical research.

Additional Experience: Joanna’s first exposure to policy work came when she served as a Legislative Intern for Representative Sean Patrick Maloney of New York. She went on to earn additional experience from internships in health science research and global health advocacy in New York and Washington, DC. Joanna most recently gained expertise in school nutrition policy as an intern at the Center for Science in the Public Interest. While studying abroad in Geneva, Switzerland, she combined her passions for health and environment, while discovering a new interest in agriculture, by completing an independent research project on the impacts of climate change on the nutritional value of rice crops.

Vital Statistics: Joanna is a dual citizen of the United States and Canada, and was born in South Africa. She spent the longest amount of time in New Rochelle, New York – which she considers home – but also lived in Maputo, Mozambique twice before finishing high school in Ottawa, Ontario. She graduated summa cum laude from the George Washington University with a Bachelor of Arts in International Affairs, a concentration in International Development, and a minor in Public Health. Joanna is an avid fan of soccer (women’s) and basketball (women’s and men’s), and spends her free time supporting the Portland Thorns, New York Liberty, Portland Trail Blazers, and Toronto Raptors in that order.

Society Engagement on International Response to Desert Locust

Lewis-Burke Associates introduced a scientific society to the contacts at the Food and Agricultural Organization who were leading on the global response to the desert locust crisis in the Horn of Africa.

By facilitating this introduction, Lewis-Burke enabled the society to raise its international profile, enable its members to advise on the Desert Locust response, and to plan awareness raising events about international coordination efforts to address pest management that would not have otherwise been possible.

Leading Advocacy for Wildfire Research Funding

Lewis-Burke worked with a large public research university to initiate an appropriations strategy to increase federal wildfire research funding and coordination. By working with university researchers, university government relations, and members of Congress, Lewis-Burke helped a university get out ahead of its peer institutions on an issue that is quickly gaining national attention.

Elevating the Profile of Coastal Sustainability

To support a university client’s multi-million-dollar investment in a new, interdisciplinary Coastal Sustainability Initiative, Lewis-Burke developed a multi-prong federal relations strategy to raise the profile of the new associated Institute and position the university for federal funding opportunities in sustainability research.  As part of the execution of this strategy, Lewis-Burke worked with relevant Members of Congress to host a briefing on Capitol Hill showcasing the university’s expertise in sustainability and featuring the participation of several leadership officials at key funding agencies.  This event also served as a platform for promoting authorization legislation focused on federal programs that support coastal resilience and sustainability research.  Concurrently, Lewis-Burke worked directly with research faculty on campus to help position the university for success in competing for a variety of federal funding opportunities.  This aspect of the strategy leveraged Lewis-Burke's ability to facilitate high-level agency meetings and contribute to the development of white papers and other promotional materials.  Finally, Lewis-Burke used its ability as a convener to assist the client in launching a university consortium focused on sustainability research.  This helped widen the reach of the initiative and engaged key Members of Congress and their staffs in a roundtable discussion on Capitol Hill which Lewis-Burke organized.  These actions collectively enabled the university to raise the profile of the new sustainability initiative among its peer institutions, key decision-makers at federal agencies, and Members of Congress.