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Executive Team
Louis A. Molina
Commissioner
Appointed in June 2024, Louis A. Molina is the commissioner of the New York City Department of Citywide Administrative Services (DCAS). Hailing from the Bronx, Molina has dedicated his career in public service to work on behalf of his fellow New Yorkers. A former New York City police officer and detective, Molina has been invested in service for nearly 25 years. He has experience modernizing law enforcement systems through robust programming and community engagement, building staff capacity, and making strategic investments that improve conditions for staff and the community.
As DCAS commissioner, Molina helms an agency committed to ensuring that city government works for all New Yorkers, this includes managing the City’s civil service system, reducing greenhouse gas emissions from city government operations, operationalizing fleet services to support all City agencies, overseeing the City’s real estate portfolio, and leveraging the City’s purchasing power to ensure that all agencies have the goods and services they need to deliver on their respective missions, and more.
Under New York City Mayor Eric Adams’ administration, Molina served as the commissioner of the New York City Department of Correction and was later promoted in October 2023 to serve as the City’s Assistant Deputy Mayor for Public Safety. Prior to these appointments, Molina served as Chief of the Department of Public Safety for the City of Las Vegas, where he oversaw the city’s jail, deputy city marshal police force and Animal Protection Services.
In 2018, Molina served as the first deputy commissioner for the Westchester County Department of Correction where he led the Westchester County DOC successfully out of Department of Justice federal oversight. Molina, was credited with implementing significant reforms to the Westchester County jail and successfully obtained compliance with U.S. Department of Justice federal oversight agreement, leading to the successful conclusion with remedying constitutional violations at the county jail.
Molina is a decorated veteran of the U.S. Marine Corps. He received a Bachelor of Arts degree in Philosophy from Chaminade University, a Master of Public Administration from Marist College School of Management, a Master of Arts degree in Human Rights Studies from Columbia University Graduate School of Arts and Sciences, and studied abroad at the University of Cambridge, United Kingdom. He was a U.S. Department of Justice/Office of Justice Programs National Institute of Justice Scholar and in 2020 received a scholarship from the Harvard Business School Fund for Leadership and Innovation in completion of his studies at Harvard Business School General Management Program.
Lynn Grubiak
Chief of Staff
Lynn Grubiak is the Chief of Staff for the Department of Citywide Administrative Services. Prior to joining DCAS, she served as Deputy Commissioner of Human Resources for the New York City Department of Correction, serving a workforce of over 8,000 employees.
Prior to joining city government, Lynn spent her career in the private sector, with decades of experience in law firm administration and project management in major international and domestic law firms.
Shameka Overton
Executive Deputy Commissioner, Asset and Property Management
Shameka Overton is the executive deputy commissioner of Asset and Property Management and is responsible for overseeing the planning, management, maintenance, and operations of the City’s real estate portfolio which is comprised of 22 million square feet of leased property and 15 million square feet of City-owned office and court buildings. DCAS Police, which provides law enforcement and security services for employees and visitors to DCAS-managed facilities, remains under her purview.
Prior to her new role, Overton was the Deputy Commissioner of Administration and was responsible for internal support services to the agency’s 2,300 employees. These services included Human Resources, Payroll and Timekeeping, Labor Relations, Disciplinary Proceedings, Employee Relations, and Transportation Services. Also included was the City Store – the official store of the City of New York, and DCAS Police.
She began her career in city government more than 20 years ago as a college intern. She holds a degree in Business Administration and is a Senior Professional in Human Resources.
Laura Ringelheim
Executive Deputy Commissioner of Internal Operations
Laura Ringelheim is the executive deputy commissioner of Internal Operations - overseeing Fiscal and Business Management, Information Technology, and Administration. Prior to this role, she served as the executive deputy commissioner of Asset and Property Management and was responsible for overseeing the planning, management, maintenance, and operations of the City’s real estate portfolio which is comprised of 22 million square feet of leased property and 15 million square feet of City-owned office and court buildings.
Ringelheim came to DCAS in 2016 and served as special counsel to the DCAS Commissioner, providing legal counsel, analysis, and oversight on agency policy and operations. She later served as the deputy commissioner of Real Estate Services where she enhanced the city’s leasing and deed restriction processes, reimagined the design and use of city spaces, and worked collaboratively with agency partners to address their space needs.
Before joining DCAS, Ringelheim served as deputy general counsel at the Mayor’s Office of Contract Services (MOCS), the City’s lead office for contracting and procurement.
Previously, Ringelheim served as the general counsel for the New York City Commission to the United Nations, Consular Corps, and Protocol (subsequently renamed the Mayor’s Office of International Affairs). As general counsel, she served as a key legal advisor for matters involving the City’s role as host to the United Nations and 192 foreign government offices.
Ringelheim also served as an assistant corporation counsel at the New York City Law Department for eight years handling both affirmative and defensive litigation in the Real Estate and Tort Litigation Divisions.
Ringelheim received her undergraduate degree from George Washington University and her law degree from Brooklyn Law School. She is admitted to practice law in New York and before the courts of the Southern and Eastern Districts.
Beatrice Thuo
Executive Deputy Commissioner, Citywide Operations
Beatrice Thuo is executive deputy commissioner of Citywide Operations and manages DCAS’ citywide functions including Citywide Procurement, Energy Management, Fleet, and Human Capital. Thuo is responsible for ensuring these divisions provide shared services to support the operations of New York City government. Through lending support, advisement, and thought partnership, Thuo works from inside-out so that all City agencies have the resources they need to deliver on their missions and meet long-term citywide mandates and commitments.
Prior to serving as executive deputy commissioner, Thuo served as the senior advisor for Real Estate Services. She spent nearly a decade in public service at the City’s Department of Housing Preservation and Development (HPD) in a number of capacities including agency attorney, associate general counsel, and deputy general counsel where she mastered the complexities of HPD’s work. Prior to beginning her career in public service, Thuo worked as a real estate finance and development attorney in the private sector.
Thuo earned her Juris Doctor at George Washington School of Law and B.A. from the University of Massachusetts and is admitted to practice law in the State of New York.
Sana Barakat
Deputy Commissioner, Energy Management
Sana Barakat is the deputy commissioner of the Division of Energy Management and the City of New York’s chief decarbonization officer. In this role, Barakat is responsible for overall management of carbon emissions from government operations. She oversees energy projects and programs funding; turnkey implementation of energy efficiency and clean energy projects; energy supply, budgeting and purchasing; large-scale renewable energy development; strategic planning and energy policy development; and workforce development and training.
Prior to joining DCAS, Barakat served as vice president of Arcadis, a global company that aims to deliver sustainable design, engineering, and consultancy solutions. Through her over 30 years’ experience, she has served as the company’s principal-in-charge and client service manager and business development leader, managing large scale and multidisciplinary projects for multiple NYC agencies with a personal portfolio of over $25 million. Notable projects include her work as Engagement Manager for the NYC Mayor’s Office of Management and Budget’s Capital Project Scope Development Services and serving as Project Manager and Project Executive for multiple water and wastewater treatment projects with the NYC Department of Environmental Protection.
Barakat holds a bachelor’s degree in Chemical Engineering and a master’s degree in Environmental Engineering from Manhattan College. She has served in engineering roles for multiple companies, lending her expertise to the planning, design, construction, and staff management of various capital projects. Barakat is a certified Envision Sustainability Professional and a Board Member of the New York Water Environment Association.
Patrick Benn
Deputy Commissioner of Facilities Management and Construction
Patrick Benn is the deputy commissioner of Facilities Management and Construction at the Department of Citywide Administrative Services (DCAS). In this capacity, he oversees the planning, construction management, maintenance, and operations of 15 million square feet of City-owned office and court buildings.
Prior to his appointment at DCAS, he served as a deputy commissioner at the New York City Department of Correction, overseeing critical operations including facilities maintenance and repair, capital projects, and fleet administration.
Benn has over 15 years of experience in facilities and construction management, and managed one of the largest public sector health system facilities at Bellevue Hospital. During the Covid-19 pandemic, his contributions to NYC Health + Hospitals were vital as he established multiple emergency operations, including testing and tracing centers, to ensure uninterrupted services.
Additionally, Benn played a significant role in the first Outposted Therapeutic Housing Units project at Bellevue Hospital, overseeing the demolition and construction of a $400 million Corrections project. He holds multiple licenses in facilities engineering and is committed to overseeing a comprehensive facilities program for DCAS.
J. Carolina Chavez
General Counsel
J. Carolina Chavez has been in public service since 2008 in a variety of legal, policy, and managerial roles. Most recently, Chavez served as the First Deputy Director for the Mayor’s Office of Criminal Justice (MOCJ), an agency she first joined as Senior Counsel in 2019. While at MOCJ, Chavez oversaw and drove a number of projects aimed at improving the criminal justice system for all New Yorkers, designing and deploying evidence-based initiatives aimed at curbing recidivism, improving public safety, and reinvesting in people and communities. Prior to her latest turn at MOCJ, Chavez served as the General Counsel and Deputy Commissioner for Policy at the Mayor’s Office of Immigrant Affairs (MOIA), providing legal and strategic advice to the agency as it coped with pandemic response and support for New York City’s immigrant community.
Chavez began her career as a prosecutor in Manhattan, where she served as an Assistant District Attorney for more than six years. In 2015, she was appointed as an Administrative Law Judge for the NY State Department of State, where she presided over occupational licensing hearings and appeals and helped develop more efficient hearing processes and procedures to better serve applicants and license holders. As a senior counsel in the Law Department’s Special Federal Litigation Division, Chavez represented the City in federal court. From 2016-2020, she taught Lawyering and Legal Writing as an adjunct professor at Cardozo Law.
Chavez is a graduate of the University of North Carolina at Chapel Hill and the George Washington University Law School. She is the proud daughter of immigrants.
Roman Gofman
Deputy Commissioner, Office of Citywide Procurement
Roman Gofman is deputy commissioner for the DCAS Office of Citywide Procurement (OCP). In this role, he leads the agency’s procurement efforts, overseeing all sourcing and procuring of goods and services for New York City agencies. Under his leadership, OCP manages a portfolio of multi-year citywide contracts with an operating budget of more than $70 million, and annual spending of over $1.5 billion. Additionally, OCP is charged with quality control for purchases, warehousing, distribution of goods to agencies, and the transfer, sale, and safe disposal of City agencies’ surplus goods. Through OCP, DCAS provides efficient and cost-effective central purchasing, meeting the highest professional standards for City operations.
Gofman has over a decade of experience working for the City of New York. Before joining DCAS in 2018 as deputy agency chief contracting officer, he served as agency chief contracting officer and senior operations manager for NYC Department of City Planning (DCP). Prior to his time at DCP, he served in various procurement roles at the NYC Department of Consumer Affairs, including director of procurement and deputy agency chief contracting officer.
Gofman earned his Bachelor of Science in Business Management & Finance from Brooklyn College, The City University of New York.
Jesse Hamilton
Deputy Commissioner, Real Estate Services
Jesse Hamilton is the deputy commissioner for Real Estate Services responsible for overseeing and providing for the real estate needs of New York City agencies. This includes accommodating space in City-owned buildings as well as leasing from private landlords when necessary. Hamilton works to facilitate the efficiency and coordination of the teams of architects, engineers, transaction managers, financial professionals, and others whose work undergirds the operation of 37 million square feet of space owned or leased by the City. His line of service also supervises the rental of City property for use by private citizens and organizations.
Prior to joining DCAS, Hamilton served as a New York State Senator from 2015 through 2018. As a senator he represented the 20th district which included the Brooklyn neighborhoods of Crown Heights, Brownsville, Prospect Heights, Sunset Park, and East Flatbush. Hamilton also served as the chairman of the New York State Senate Banking Committee.
A native New Yorker, Hamilton, has spent his entire career helping people, including as a civil servant working at the New York City Department of Finance (DOF). At DOF, he conducted small claims hearings for property tax reductions. He also served as vice president of Community Board 8 for seven years in Crown Heights and as the president of Community School Board District 17. Hamilton also served as legal counsel to former New York State Senator Eric Adams.
Hamilton is a member of the New York State Bar and Brooklyn Bar Association. He graduated from Ithaca College, received his M.B.A. from Long Island University, and his J.D. from Seton Hall University. Hamilton is also certified by New York University in Estate Planning.
Hamilton and his wife, Lorna, have lived in Brooklyn for over 20 years, with their two children and a Dachshund named Paxton.
Keith Todd Kerman
Deputy Commissioner, Fleet Management and Chief Fleet Officer
Keith Todd Kerman is the deputy commissioner of Fleet Management and the City of New York's first chief fleet officer. In that role, he is responsible for the largest municipal fleet in the United States, with nearly 29,000 vehicles, 80,000 fleet operators, and more than 1,800 employees engaged in fleet operations. Kerman manages inter-agency shared fleet services in partnership with major fleet agencies, including the Police, Fire, Sanitation, and Transportation departments.
Kerman leads implementation of the NYC Clean Fleet initiative to reduce greenhouse gas emissions 50 percent by 2025. The City has one of the greenest fleets in the nation with over 21,000 vehicles operating on some type of alternative fuel, including New York state's largest electric fleet, charging network, and renewable diesel program. Kerman is also a leader in fleet safety as part of the City of New York's Vision Zero initiative to eliminate traffic fatalities.
Kerman has worked in public service for over three decades. Prior to his role at DCAS, he served more than 17 years with NYC Parks, most recently as assistant commissioner for Citywide Operations. Kerman was recipient of the Sloan Public Service Award in 2019. He is a graduate of Harvard College.
Shanna Midelton
Chief Financial Officer / Deputy Commissioner, Fiscal and Business Management
Shanna Midelton is the chief financial officer/deputy commissioner of Fiscal and Business Management (FBM), the central financial oversight for DCAS’ expense, capital, and revenue budget. As an experienced leader in government, Midelton brings with her years of experience working with stakeholders across New York City government.
Prior to joining DCAS, Midelton served as a senior advisor at City Hall where she supported the first deputy mayor on education policy and the deputy mayor of strategic initiatives on launching the administration’s blueprint on childcare and early childhood education.
Midelton started her career at the NYC Office of Management & Budget (OMB) where she spent nine years in various roles. As the assistant director for education, she oversaw the education portfolio consisting of expense and capital budgets for the Department of Education, CUNY community colleges, and the School Construction Authority. Also at OMB, Midelton served as the associate director of intergovernmental affairs and community boards.
Midelton previously worked at the International Rescue Committee (IRC), a non-profit organization dedicated to providing humanitarian assistance to countries in conflict. At IRC, Midelton served as a senior coordinator for grants & operations.
Midelton holds an M.A. in International Relations and Economics from the City University of New York and has been active with numerous community organizations, including The Council of Urban Professionals (CUP), as a Big Sister with the Big Brothers Big Sisters Chapter of NYC, and as a mentor with iMentor NYC.
Silvia Montalban
Chief Citywide Equity and Inclusion Officer/Deputy Commissioner
Silvia Montalban is the chief citywide equity and inclusion officer and oversees Citywide Equity and Inclusion (CEI). She is responsible for fostering the City of New York’s emergence as an innovative and global leader in equitable, diverse and inclusive employment practices. CEI is responsible for ensuring proper and consistent implementation of the City’s EEO policy and other related policies and procedures and provides best practice guidance impacting the workforce across over 80 City government agencies.
Montalban is an attorney experienced in institutional compliance with non-discrimination laws and policies, employment law and employee relations matters in both city government and higher education. Prior to her role at DCAS, Montalban worked 10 years at the City University of New York's John Jay College of Criminal Justice, where she served as the head of the Compliance and Diversity department, addressing matters impacting both the employee and student populations. She handled investigations under non-discrimination policies and laws, including Title IX, and led policy training programs for employees and students. During her tenure at John Jay College, she also served as the secondary head of the Office of the General Counsel for several years.
Her prior city government service includes: director of the Employment Law Unit at the NYC Administration for Children's Services; and as an attorney with the NYC Department of Homeless Services monitoring emergency assistance petitions, representing the agency in appeal hearings and labor proceedings, advising the Family Services division in the legal compliance of programmatic initiatives, and later serving as the agency's personnel director.
Montalban is a graduate of Columbia College of Columbia University and earned her Juris Doctor degree from Hofstra University School of Law.
Nitin Patel
Deputy Commissioner, Information Technology and Chief Information Officer
Nitin Patel is the deputy commissioner of Information Technology and DCAS’ Chief Information Officer. In that role, he is responsible for providing technological guidance for the agency and for establishing and directing the strategic and tactical goals, policies, and procedures for the Information Technology department. He collaborates with the agency's commissioner and consults with all of the agency's lines of service to present new approaches and discuss system changes.
Prior to joining DCAS, Patel worked at New York City’s Financial Information Services Agency implementing Citywide Human Resources, payroll, and timekeeping systems. Previously, he worked in the consulting, media, and healthcare industries and has more than 22 years of experience working as an IT executive linking business strategies and technology solutions.
Patel has an electrical engineering degree from the Indian Institute of Technology.
Katrina Porter
Deputy Commissioner/Chief Human Capital Officer
Katrina Porter is the deputy commissioner and chief human capital officer for the Department of Citywide Administrative Services, which is charged with maintaining the civil service system for the City of New York. She is responsible for the creation and implementation of strategies and initiatives to ensure the city develops and retains the best talent to support and execute agency operations citywide, in a manner consistent with state and civil service law, and laws governing equal employment opportunity. Porter leads the team that develops and interprets citywide policies and programs, administers civil service exams, and develops and conducts professional development and employee training programs, among other critical functions.
With over 25 years of public service, her unwavering dedication and passion for improving government operations have fueled her impactful civil service journey. Within DCAS, Porter has cultivated a deep understanding of government dynamics, civil service intricacies, and innovative problem-solving techniques. With a determination to advance DCAS' mission and enhance New York City's appeal as a flexible and attractive workplace, she is enthusiastic about her role in contributing to New York City’s ongoing success and the agency's growth, highlighting the importance of our workforce.
Porter most recently served as the executive director for Examinations at DCAS, and prior to this role, she served for more than 20 years at the New York City Housing Authority in various capacities.
Carmine Rivetti
Deputy Commissioner of Public Affairs
Carmine Rivetti is the deputy commissioner of Public Affairs. In this role, he oversees external affairs, the daily publication of the City-charter mandated City Record, and the Office of Communications which features multiple specialized units including Creative Services, Media Services, Special Events, and Reproduction Services. Under his leadership, the teams within Public Affairs work synergistically to enhance the DCAS’ public image, manage its reputation, and achieve its strategic objectives by fostering positive relationships and effectively communicating its mission and values. Most recently, Rivetti served as the agency chief of staff, providing strategic support and guidance, liaising with senior staff to streamline and expedite processes, and fostering a culture of increased transparency and collaboration.
Before joining DCAS in 2014, Rivetti served as associate vice president of Income for the United Way of New York City overseeing social service-related initiatives, which include financial management, food stamps outreach, hunger prevention, and the Emergency Food and Shelter Program.
He has spent more than 20 years in the public sector starting his career as a legislative financial analyst at the New York City Council. Rivetti continued his career as a government relations specialist with the American Cancer Society and NYCHA and would later serve as assistant commissioner for Government and Community Relations at the Department of Homeless Services.
Rivetti holds a Master's in social work from Columbia University and a Bachelor of Arts from Drew University.
Joseph Wagner
Assistant Commissioner/Chief Engineer, Construction and Technical Services
Joseph Wagner is assistant commissioner/chief engineer responsible for DCAS' Construction and Technical Services. He coordinates all phases of construction for DCAS facilities, is responsible for the maintenance and repair of nearly 600 vertical lifts, and for the inspections, condition assessments, recommendations, and repairs of approximately 1,800 DCAS properties, including waterfront properties within the five boroughs.
Wagner is a professional engineer with more than 40 years of experience in structural engineering. His background is in structural design, construction, field inspections of high rise buildings, and the maintenance and rehabilitation of existing buildings.
Prior to joining the City of New York in 1988, he served as vice president and partner of Ramp Engineering Consultants, where he handled multi-million-dollar projects, from design through construction, for both the public and private sectors.
He is registered as a professional engineer in New York, New Jersey, Florida, and North Carolina. He also holds certification as a structural engineer from the Structural Engineering Certification Board, a certification as a special inspector of threshold buildings in the state of Florida, special inspector for the City of New York, and holds a New York City contractor’s license. Wagner has a Bachelor of Science degree in Civil Engineering from Fairleigh Dickinson University.