Joseph has served as Chairman of the Horning real estate business for the past ten years. He played a leadership role in the redevelopment of the historic Tivoli Theater, working closely with architects and preservationists as well as neighborhood and cultural partners. Mr. Horning’s experience in the arts includes administrative positions with the Boston Philharmonic, New England Conservatory of Music, Levine School of Music, and the National Endowment for the Arts. He has thirty years of experience as a choral conductor and music educator in the Boston area. Mr. Horning has music degrees from Kenyon College and New England Conservatory of Music. He serves on the Board of Gala Hispanic Theater in Washington, D.C. and Choral Arts New England and enjoys designing gardens and tutoring young readers.
Executive Leadership

Jamie Weinbaum
CEO and President
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Jamie is responsible for overseeing all aspects of the business including operations, development, and strategic planning. He is a seasoned real estate leader and senior executive with significant experience in multi-family and mixed-use investment, development, and asset management.
Prior to joining Horning, Jamie was an Executive Vice President at MidCity, where he led all development activities to build out a 4 million sf pipeline across numerous urban infill properties. Before MidCity, Jamie served as COO of Ditto Residential, where he led all development and construction-related activities as well as long-term strategic growth initiatives. His prior experience includes managing large-scale, mixed-use residential and retail projects at JBG Smith, serving as the Director of the DC Office of Zoning, and working for the DC Deputy Mayor for Planning and Economic Development. Jamie has been active in several non-profits throughout his career, including serving in various leadership roles nationally and locally at the Urban Land Institute (ULI). Jamie holds a JD from the George Washington University School of Law and a BA from Wake Forest University.

Jeff Milota
Chief Financial Officer
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Jeff serves as Horning's CFO where he is responsible for overseeing all financing transactions. Additionally he is involved with development, acquisitions, asset management and strategic planning for the company. Prior to joining Horning in 2002, Jeff was with the Reznick Group primarily working on special projects for their audit clients. Jeff has an undergraduate degree from the University of Delaware in Accounting and is a CPA. Jeff is also involved with the University of Maryland Masters in Real Estate Program.

Andrew Vincent
Chief Investment Officer
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Andrew joined Horning in 2018 and serves as Horning’s Chief Investment Officer where he oversees development and acquisitions, asset management, capital projects, and the company’s commercial portfolio. Andrew previously served as Director of AHC Greater Baltimore, a non-profit affordable housing developer, where he acquired and developed 1,500 apartment homes for low-income residents. Prior to that, Andrew was an Associate at Booz Allen, where he advised clients including the Department of Energy’s Nuclear Decommissioning Program and NASA. Andrew earned a BA degree in economics from Carleton College and an MS in Real Estate Development from Columbia University. Andrew has served on various non-profit boards over his career and is currently active on the board of Wesley Housing as Chair of the Real Estate Development Committee as well as on the Leadership Council for the Partnership to End Homelessness.

Nikki Burris
Vice President of Human Resources
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As Vice President of Human Resources at Horning, Nikki oversees talent acquisition, employee relations, compensation, benefits, and organizational development, ensuring HR strategies align with business goals. With expertise in HR strategy, talent management, and organizational change, Nikki has led successful initiatives in compensation restructuring and diversity and inclusion, driving both employee retention and a more inclusive workplace culture. Holding a Master’s in Human Resource Management and SHRM-CP certification, she is committed to continuous professional growth and is an active member of SHRM.

Amber Cook
Vice President of Property Management
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Amber is the Vice President of Property Management at Horning, leading the Property Management and Compliance divisions. She oversees the operations of a diverse portfolio of 31 assets, comprising nearly 5,000 units across Washington, DC, Maryland, and Virginia. With over a decade of experience in multifamily housing, including managing communities across six additional states with third-party manager Village Green, Amber now drives the operational and financial performance of Horning’s portfolio. She leads her team in maximizing profitability, enhancing resident satisfaction, and driving strategic growth by optimizing property management practices and mentoring teams. Amber holds a Bachelor's Degree in Business Analytics from Davenport University in Grand Rapids, Michigan.

Fredy Zelaya
Vice President of Facilities and Maintenance
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Fredy stands at the forefront of asset preservation and facilities management at Horning. As the VP of Facilities and Maintenance, he is instrumental in crafting and enforcing policies and best practices that ensure our assets are not just maintained but enhanced over time.
Prior to joining Horning, Fredy showcased his expertise at Winn Residential and Clark Realty.There, he held the significant responsibility of overseeing the facilities department for an expansive portfolio spanning the Mid-Atlantic region. His role was more than managerial; he served as a pivotal strategic liaison between the Facilities department and esteemed clients,bridging communication and ensuring seamless operations.
Key Leaders

Jay Berkowitz
Regional Property Manager
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Jay serves as the Regional Property Manager at Horning, leveraging over 30 years of expertise in property management. He oversees the operation of 12 properties across DC and Maryland. Jay previously was the Director of Affordable Housing at Horning for 15 years before leaving to work as an asset manager for the Housing Opportunities Commission of Montgomery County. He has extensive experience with both market and affordable properties and has a diverse range of responsibilities, including HUD oversight, lease management, affordable housing initiatives, tax credit compliance, and day-to-day operational oversight.

Barry Marlin
Controller
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Barry currently serves as Horning's Controller, where he is responsible for overseeing the company’s accounting activities and department. Prior to joining Horning, Barry was an Accounting Manager at Federal Realty Investment Trust, where he primarily handled a mix of property and development accounting responsibilities for a portfolio of retail and mixed-use properties. Barry began his career as an auditor at CohnReznick LLP. Barry has a bachelor’s degree in Accounting from Pennsylvania State University and is a Certified Public Accountant.

Tamika McDonald
Assistant Regional Property Manager
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Tamika serves as the Assistant Regional Property Manager at Horning, leveraging over 14 years of expertise in property management. Tamika's extensive experience encompasses a diverse range of responsibilities, including HUD inspections, lease management, affordable housing initiatives, retail leasing, tax credit compliance, and day-to-day operational oversight. She is known for her strategic acumen and meticulous approach to managing multifamily properties, ensuring both regulatory compliance and optimal resident satisfaction.

Hollis Phifer
Regional Maintenance Manager
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Hollis serves as a Regional Maintenance Manager for Horning, bringing over 29 years of experience in Facilities Maintenance. In his current role, Hollis is dedicated to implementing effective maintenance policies, managing capital projects, and ensuring the highest standards of maintenance operations across his portfolio.
Hollis’ career journey showcases his versatility and leadership abilities, from his early days as an HVAC Service Tech to his tenure as Chief Engineer at Grady Management. He has been recognized with prestigious awards such as the PMA’s Engineer of the Year and the Horning President's Award. He serves as Chair of the PMA’s Facilities and Maintenance council.

Rossnat Rodriguez
Director of Compliance
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Rossnat currently serves as Director of Compliance. She has over 20 years of experience in affordable housing. Her responsibilities include development, implementation of policies and procedures for the residential properties as well as training and educating employees on any new process and policies, tracking, and performing compliance audits. Rossnat is a NCHM member with a COSA, TCS, MOR, CMH, EIV certification for affordable housing. She joined Horning in 1996 as an accounting clerk then transitioned to Accounts Receivable Coordinator for the residential and commercial properties.
Rossnat has a business administration degree from Strayer University.

Heidy Villanueva
Assistant Regional Property Manager
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Heidy serves as the Assistant Regional Manager, currently overseeing four properties in Washington, DC, including both conventional and HUD housing. In this role, she helps manage the daily operations of these properties, working alongside Property and Service Managers to handle tenant relations, lease administration, maintenance coordination, financial reporting, and regulatory compliance.
With 22 years of experience in property management, Heidy has developed strong expertise in budgeting, vendor management, strategic planning, and team leadership. Holding a Master’s degree in Business Administration, along with an Accredited Residential Manager designation and IZ certification, Heidy possesses a robust foundation for success.

Lekeisha Vone
Director of Commercial Operations
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Lekeisha is the Director of Commericial Operations at Horning and has over 15 years of experience in the commercial property management field. Her responsibilities include overseeing the day-to-day operations and financial management of Horning commercial portfolio of mixed-used assets consisting approximately 387,000 square feet, in addition to Martha’s Table 43,000 square foot headquarters. Her prior employers include Lincoln Property Company and Brookfield Office Properties. A native of Washington, DC, Ms. Vone holds a Bachelors of Science Degree in Business Management with a minor concentration in Business Law and Public Policy from the University of Maryland University College. She is a candidate for the Real Property Administration (RPA) designation with BOMI International and a member of Women in Retail Real Estate (WIRRE).

Dwarren Williams
Regional Mainteance Manager
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Dwarren serves as a Regional Service Manager at Horning. Warren is responsible for supporting the Director of Maintenance with overseeing the portfolio's Maintenance Operations. Warren’s responsibilities include the implementing of maintenance policies, management of capital projects, renovations, physical condition assessments.
Warren has over 12 years in the multi-family industry in various service-related positions including Porter, Service Manager, Floating Service Manager and Maintenance Recruiter. Previously Warren spent 7 years as a Floating Service Manager for Equity Residential supporting all Virginia, Maryland and District of Columbia communities.

Maria Wilsey
Director of Operations
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Maria currently serves as Director of Operations where she manages the development, implementation and training on the procedures and processes of the residential and commercial properties. She started with Horning in 2002 as Property Manager and then transitioned to Regional Manager before assuming her current role.
Maria brings over 30 years of diverse property management experience. She worked with Charles E. Smith and Archstone-Smith prior to joining Horning, where she was a multi-site Property Manager at properties throughout the DMV area, and managed various residentials properties through acquisition and lease up and is skilled at preserving and enhancing value through operations. She attended Virginia Commonwealth University.
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