Peter H. Kostmayer

Chief Executive Officer

Peter was a member of the US Congress for seven terms from Bucks County, Pennsylvania, and served in the first Clinton administration as a senior official at the Environmental Protection Agency, overseeing the agency in five middle Atlantic states and the District of Columbia. After leaving government, he became President of Population Connection in Washington, D.C., working on the environmental aspects of population growth and toward universal family planning for all women. Peter is a graduate of Columbia University and lives in Clinton Hill, Brooklyn.

Lori Lichtman

Executive Director

Lori works with our development, programs, and communications teams as well as our dedicated boards and generous individual, corporate, and foundation partners to help support grassroots neighborhood improvement projects. Prior to Citizens Committee, Lori worked in project management in Israel, in advertising and marketing, and in outdoor education. She lives in Fort Greene, Brooklyn,



Arif Ullah

Director of Programs

Arif manages Citizens Committee's programs. He is on the board of Farm School NYC and is involved in his local community garden where he grows food and keeps bees. Prior to Citizens Committee, he worked as an immigrants rights community organizer with American Friends Service Committee. He is a graduate of Hunter College and Duke University, and lives in Jackson Heights, Queens, the borough in which he grew up after migrating from Bangladesh. Arif is committed to various issues of social, racial, and environmental justice.

Conor Greene

Director of Communications and Public Affairs

Conor Greene is responsible for highlighting the work Citizens Committee makes possible, and builds partnerships with key elected officials, government staff, and grantees. He joined Citizens Committee after a decade in NYC media, government, and nonprofits, most recently overseeing public affairs and government relations for The Doe Fund. During this time, he played a central role in the founding and launch of the first citywide charitable bail organization. Conor started his career in journalism, and has also served as communications director for several City Council members in Brooklyn and Queens.

Scott Young

Manager of Individual Giving and Special Events

Scott is a passionate fundraiser who works with our generous individual donors as well as those who contribute to our annual events to raise the funds necessary to achieve the mission of Citizens Committee.  With over a decade of development experience at organizations including the LGBT Community Center, the Joyce Theater Foundation, and Walnut Street Theatre, Scott is dedicated to providing opportunities for donors who want to make an impact and give to important organizations like Citizens Committee.  Scott holds a BA from Southern Utah University and lives in Glendale, Queens. 

Andrew Rohrberger

Manager of Institutional Giving

Andrew works in the development department and organizes volunteer days. Prior to joining Citizens Committee, he staffed state and federal political campaigns in his home state of New Jersey, concentrating on fundraising and grassroots organization. Andrew graduated from Tufts University with a degree in Political Science. While there, he created and taught a class for freshmen, whom he mentored through the transition to college. He lives in Crown Heights.

Erika Lim

Development and Volunteer Coordinator

Erika works in the development department to organize fundraising events and volunteer days to improve the lives of New Yorkers. Prior to joining Citizens Committee, she was an AmeriCorps service member serving in FEMA Corps where she was deployed to disaster relief efforts in Texas, Florida and Puerto Rico during the unprecedented hurricane season of 2017.  Erika graduated from Soka University of America in Aliso Viejo, CA with a BA in Liberal Arts and a concentration in social and behavioral science. As a native New Yorker dedicated to living a contributive life, she is excited to return home to work side by side with her fellow New Yorkers to better their neighborhoods and their city together.

Katie Grassle

Program Grants Manager 

Katie works with the programs team supporting grassroots community groups through project planning assistance, workshops, and grant management. Katie originally served with Citizens Committee as an NYC Civic Corps member, and is excited to rejoin the team after leaving to complete a master's in Conservation Medicine at the Cummings School of Veterinary Medicine at Tufts University. Her thesis focused on the mutual benefits of community gardens for human health and butterfly conservation in four South Bronx gardens. She also earned a bachelor's degree in Anthropology from Bryn Mawr College. Katie is passionate about environmental justice, and hopes to continue using a local, grassroots approach to addressing human health issues as a result of disproportionate environmental degradation.

Andre Mozeak

Outreach Coordinator

Andre Mozeak is a community organizer, educator, and activist. His work with various nonprofit organizations has allowed him to engage groups civically on important social and economic issues. Before completing his B.A. in International Studies at the City College of New York, Andre found his calling by helping to organize immigrant workers around New York State. In other positions he has, among other things, planned and coordinated large-scale voter registration efforts, helping newly naturalized Americans and over 10,000 high school seniors across New York City to register between 2016 and 2017. He has developed and led trainings to get community groups and young New Yorkers involved in Participatory Budgeting, Parent Teacher Associations, and Community Boards and has a number of years of experience coordinating field efforts for local, state, and federal political campaigns. Born and raised at the end of the E line in Jamaica, Queens, Andre is now a proud resident of East Harlem and enjoys writing and performing music, improving his Spanish, and can be found around the boroughs on nights and weekends volunteering for direct-service initiatives.

Ambien Mitchell

Program Coordinator

Ambien Mitchell is an activist and artist and is proud to support grassroots community groups across New York City on the programs team. Prior to Citizens Committee, she worked for the NYC Department of Education supporting teacher candidates in the completion of alternative certification programs in high need areas and strengthening teacher recruitment for equity-focused education initiatives such as Pre-K for All. Ambien lived for several years in rural Mexico working in an hacienda which now functions as a hotel. She expanded the hacienda’s foreign tourism market, leading bilingual tours and providing translation and logistical supports for English-speaking guests. At the hacienda, she piloted a community outreach program for youth in the nearby colonia, teaching English and facilitating community cleaning days with sixth graders, and also helped launch the hacienda’s artist residency program. Ambien is a passionate advocate for immigration reform and migration justice and a grateful resident of Flatbush – Ditmas Park, Brooklyn.

Keenen Willis

Program Corps Member

Keenen works in the programs department team supporting grassroots community groups as a NYC Civic Service Corps member. Prior to Citizens Committee, Keenen interned at the Department of Sanitation conducting outreach for the city’s recycling and organics programs. As an environmental education intern at WE ACT for Environmental Justice, he also expanded an interactive curriculum focused on environmental justice and community leadership. He earned a Bachelor’s Degree in Environmental Studies from Oberlin College. Keenen is committed to promoting environmental and climate justice through working with local NYC communities. He lives in Park Slope, Brooklyn.

Thelma Leemans

Executive Assistant

Thelma joined Citizens Committee in July 2004. She functions as Executive Assistant to the CEO, and additionally handles HR and accounting issues. Prior to coming to Citizens Committee, Thelma worked in the music industry in Los Angeles, London, and New York.

Moisés Vicente

Programs Intern

Moisés works in the Programs department as a CUNY Service Corps member and is a Liberal Arts major who plans on investigating the ways in which creative practice can create impact in New York City. Previously Moisés has worked within the music and audio field and he enjoys making the connections between these creative experiences and the work of CCNYC and its grantee groups. Born and raised in New York City, Moisés has a vested interest in assuring that the city's residents are respected, valued, and supported in the best ways possible.

Mardiya Magnus Asamoah

Programs Intern

Mardiyah is completing her final semester of studies at BMCC  and majoring in criminal justice. Mardiya is passionate about supporting the education of her peers and is a tutor in English , Economics , policing, constitutional law, and introduction to criminal justice at BMCC's Learning Resource Center. In addition to tutoring, Mardiya volunteers for BMCC's women resource center and counseling center, is a BMCC dean’s list recipient, and a member of the Phi The Kappa Group.


Rochelle Rhooms

Development Intern

Rochelle works in the development department as a CUNY Service Corps member. Prior to joining Citizens Committee, Rochelle has interned, studied, and volunteered abroad and she is currently a senior at John Jay College of Criminal Justice, majoring in Political Science with a concentration in International Politics and Human Rights and a double minor in Anthropology and Africana Studies. She is eager to serve New Yorkers by helping them improve the quality of life in their neighborhoods.

Michael Perry

Development Intern

Michael works in the development department as an intern. Prior to joining Citizens Committee, Mike worked for the NYC Department of Education as the Program Coordinator for service-learning programming city-wide and worked as a Youth Program Associate for Coro New York Leadership Center. He most recently served as an Education Pioneer Summer Fellow placed at Sponsors for Educational Opportunity. He is currently a student at NYU Wagner pursuing a Master of Public Administration, and he holds a BA from Cornell University.  Michael has a passion for public service and education. He is excited to join Citizens Committee for New York City and help improve the lives of New Yorkers.

Zachary Maguire

Development Intern

Zack is interning in the development department for the spring of 2019. He is a senior at Long Island University pursuing an undergraduate degree in Global Studies, with a minor in International relations. Zach is originally from New Jersey, and has spent the last three years studying in different locations around the world. Prior to interning with Citizens Committee, he interned with The Innovation in Politics Institute in Vienna, Austria for the fall of 2018. He is passionate about communicating and working with other people, and is excited to help New Yorkers make their neighborhoods better places to live.