Housing. Education. Community.

At MHAGH, we are committed to affordable housing, engaging residents and continuing development in the Greater Hartford area.


Catherine MacKinnon, Executive Director

Deborah L. Broaden, Director of Housing Education & Engagement

Sonia Diaz, Administrative Assistant

Mary Fields, Administrative Assistant

Wilma L. Guzmán, Deputy Director of Property Management

Carmen Mercado, Administrative Assistant

Sarah Miner, Director of Real Estate Development

Margarita Plaks, Property Staff Accountant

Jonathan Rodriguez, Maintenance Coordinator

Mary Sampson, Leasing & Compliance Officer

Sharon Stimson, Senior Accountant

José L. Vargas, Director of Property Management

Liz Velázquez, Leasing Supervisor

Stephen Yenke, Communications Coordinator


Catherine MacKinnon

Executive Director

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Cathy joined MHAGH as Executive Director in April 1992. Since then, she has assisted the organization in developing 450 units and 12 properties and raising more than $80 million in grants and equity for these developments. Cathy holds a B.A. in Anthropology and Urban Studies from Dartmouth College and an M.B.A. from Rensselaer Polytechnic Institute.


Deborah Broaden

Director of Housing Education & Engagement

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Deborah joined MHAGH in 2015. Her primary focus is increasing community impact through leadership programs; resident services; homebuyer education; and financial education, including credit repair and awareness. Deborah is a certified Ready to Rent© educator and she directs all aspects of MHAGH community outreach. Deborah brings 13 years of executive experience in a nonprofit housing agency, where she managed multiple State and Federal Housing Assistance Programs designed for low-to-moderate income households. During her 40 year span in the banking industry, she ensured Community Reinvestment Act (CRA) compliance for 8 states. She shares her extensive knowledge and is willing to work one-on-one to help clients achieve financial stability through money management skills.


Sonia Diaz

Administrative Assistant

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Mary Fields

Administrative Assistant

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Mary joined MHAGH in 1996 as administrative support. She ensures the office operates smoothly, is responsible for office organization, and completes a variety of clerical and data entry tasks. Mary is the first point of contact for many residents, clients, and partners; and she delivers exceptional customer service to all who call or come through the door.


Wilma L. Guzmán

Deputy Director of Property Management

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Wilma joined MHAGH in October 2007. She is responsible for overseeing the management of the MHAGH portfolio. Wilma has over 15 years of property management experience. She is a certified Specialist in Housing Credit Management® (SHCM®), Tax Credit Specialist (TCS), Certified Occupancy Specialist (COS), and holds an Associate of Accounting degree from Capital Community College.


Carmen Mercado

Administrative Assistant

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Carmen joined MHAGH in May 2017. She increases operational efficiency by offering administrative support to multiple departments, including compliance, where she holds a Tax Credit Specialist (TCS) certification. She brings experience from both public and nonprofit settings, including the Hartford Public School system. Carmen is currently earning an Associate of Social Work degree, and plans to ultimately pursue an M.S.W.


Sarah Miner

Director of Real Estate Development

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Sarah joined MHAGH in 2011. Since then, she has been responsible for harmonizing various aspects of MHAGH's operations. As the lead on real estate development, Sarah manages projects from concept through post-construction, including securing funding and overseeing the development team. She is also responsible for coordinating the human resource and information technologies functions for MHAGH. Sarah holds a B.A. in English from New York University and an M.P.A. from the University of Connecticut.


Margarita Plaks

Property Staff Accountant

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Margarita joined MHAGH in 2013. She supports the accounting department and is responsible for many accounting functions including accounts payable, bank reconciliations, and reporting. Margarita brings over 30 years of accounting experience. She holds a B.S. in Accounting from Minsk University of Technology in Belarus and a Certificate of Accounting from Tunxis Community College.


Jonathan Rodriguez

Maintenance Coordinator


Jonathan joined MHAGH in 2009. He is responsible for managing a team of 9 while coordinating all repairs, apartment turnovers, landscaping, and snow removal. Before coming to MHAGH, Jonathan worked in construction. He holds a certification as a Computer Repair and Network Technician from Instituto de Banca y Comercio in San Juan, Puerto Rico.



Leasing & Compliance Officer

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Mary joined MHAGH in 2000 and is responsible for occupancy and compliance standards for the MHAGH portfolio. She builds relationships with funders by ensuring compliance and maintaining records for several state and federal regulatory agencies. She came to MHAGH with 20 years of property and asset management experience. Mary holds a B.A. in Early Childhood Education and a B.A. in Home Economics, both from Hood College; and an M.S. in Housing and Consumer Sciences from Colorado State University.


Sharon Stimson

Senior Accountant

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Sharon joined MHAGH in September 2017. She is responsible for all aspects of the accounting functions. Her responsibilities include managing month-end close, preparing financial statements, budget analysis, and budget development through collaboration with management. Sharon brings over 25 years of accounting experience in the real estate and manufacturing industries. She holds a B.S. in Business Administration from Bryant University and an M.B.A. from the University of Connecticut.


José Vargas

Director of Property Management

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José joined MHAGH as Director of Property Management in 2007. Since then, he has been responsible for all aspects of MHAGH's property management division, including marketing, leasing, budgeting, fiscal management, maintenance functions, resident safety, and compliance with all applicable laws and regulations of HUD and LIHTC housing programs. José has more than 20 years of property management experience and holds the following certifications: Housing Credit Certified Professional (HCCP), Public Housing Manager (PHM), Affordable Housing Manager (AHM) and Certified Occupancy Specialist (COS).


Liz Velázquez

Leasing Supervisor

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Liz joined MHAGH in 2013. Her primary responsibility is leasing, including ensuring tenant eligibility and compliance. Liz is often the first point of contact for applicants, and her previous experience in excellent customer service is exhibited in her attention to detail, and concern for future tenants. She holds a Tax Credit Specialist (TCS), Certified Occupancy Specialist (COS), and Fair Housing training and certification.


Stephen Yenke

Communications Coordinator

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Stephen joined MHAGH in 2018. He is responsible for branding and marketing in addition to data collection, analysis, and reporting. He holds a B.A. in Economics from the University of Connecticut.