Our Team

Erin DiGirolamo joined Horizon Corporations in 2006 and serves as the organization’s Chief Executive Officer. She came to Horizon after 16 years in Ernst & Young’s Healthcare Consulting Division where she conducted turnaround projects. Her experience serves her well, as Erin’s responsibilities at Horizon include both optimizing operational efficiencies and ensuring financial stability. In her role, Erin is responsible for the strategic and operational aspects of the organization’s financial planning, management, and development. She leads many operational change initiatives across all service lines and especially loves leading the marketing team.

As a “status quo” challenger, she is frequently asked to participate in statewide committees related to major change initiatives, including:

• Medicaid Rate Reform
• NYS Value Based Payment Reform
• DSRIP financial committees.

Erin was a 2007 recipient of Business First’s “Forty Under 40″ award and the 2008 “CFO of the Year” awardee. She was a proud member of the Leadership Buffalo class of 2008. Erin received a B.S. Degree in Accounting from St. Bonaventure University, and a secondary concentration in Pharmacy from West Virginia University. She is a resident of Orchard Park and mom to two busy children. Erin is currently a board member of Hospice & Palliative Care of Buffalo.

Brandy Vandermark Murray is the President of Horizon Corporations in Buffalo, New York, where she leads one of the region’s most comprehensive behavioral health organizations. Prior to her appointment as President, she served as Senior Vice President of Operations, providing executive oversight for all behavioral health programs and driving strategic initiatives that strengthened Horizon’s clinical and operational excellence.

A licensed mental health counselor and certified alcohol and substance abuse counselor, Brandy brings more than twenty years of clinical experience to her leadership. She has been a driving force behind Horizon’s integrated care model and has played a pivotal role in expanding substance use services across Western New York. Her accomplishments include restructuring and expanding Erie County’s only community based detoxification program and developing two innovative residential programs—one for young adults and one for women—that were the first in New York State to operate under the new 820 regulations, enabling more intensive clinical services within residential settings.

Brandy is deeply committed to ensuring high quality, accessible behavioral health care for all community members and to fostering a supportive, mission driven environment for the behavioral health workforce. She has been recognized for her leadership with the ASAP Eileen Pencer Women’s Leadership Award and the 2025 Business First Excellence in Healthcare Award. She has also championed women specific programming at Horizon, including expanded training in perinatal mental health and partnerships with local medical providers to strengthen early intervention.

In addition to her executive role, Brandy serves as an adjunct professor in the Graduate School of Mental Health Counseling at Canisius University, where she teaches courses on substance use and the impact of the opioid epidemic. An alumna of Canisius College, she holds a bachelor’s degree in political science and a graduate degree in mental health counseling.

Brandy is a strong advocate for behavioral health policy reform and workforce development, frequently speaking at both the state and national levels. She serves as the Region 2 Board Member for the National Council for Mental Wellbeing, sits on the Executive Board of InUnity Alliance, and is an active member of the Therapeutic Community Association of New York State.

A committed community leader, Brandy is a graduate of Leadership Buffalo’s Class of 2022 and serves on several community boards throughout Western New York.

She lives in Snyder, New York, with her husband, their two children, and their dogs, Lilly and Winston.

Jake Haacker is responsible for developing and executing information technology strategies for Horizon Corporations, including the Electronic Health Record (EHR), reporting analytics, network security, and IT support. He oversees the IT Infrastructure Team, Help Desk, Cyber Security, and Business Intelligence departments.

Under Jake’s leadership, Horizon has transformed its technology infrastructure to improve business operations, reduce operational costs, enhance patient care, and streamline analytic reporting to achieve interoperability.

Before joining Horizon, Jake worked as a consultant for over a decade, implementing technology projects and improving business processes in companies across New York State. He is a graduate of the University of Buffalo’s School of Management with a concentration in Management Information Systems.

Amelia began her career in the field of public accounting after graduating from SUNY Buffalo with bachelor’s and master’s degrees in accounting. She joined Horizon in 2013 as a senior accountant and held various positions within the finance team before being appointed VP of Finance in 2022. Amelia feels at home at Horizon because of the shared embodiment of the company mission evident across the organization: Together for Recovery. Changing Lives. Saving Lives.

In her role, Amelia is responsible for overall financial operations, including monthly reporting, companywide payroll, retirement plan administration, and overseeing financial audits. She is passionate about employee engagement and strives to create programs and processes that benefit employees and patients alike and better Horizon as a whole.

Amelia is a lifelong resident of Western New York and a diehard Bills fan. She currently resides in Orchard Park with her husband and two young boys.

Brenda John Banach provides executive leadership for Horizon’s compliance, administrative operations, patient engagement, and grant departments. As part of the executive strategic planning team, she contributes to major organizational initiatives and plays a key role in shaping and expanding programs across all outpatient and residential services.

Brenda joined Horizon in 1988 as a clinician in one of the organization’s Continuing Day Treatment programs, offering both individual and group therapy. Over the course of her career, she has held a wide range of clinical and operational roles spanning mental health, substance use, vocational services, and medical psychiatric care.

She earned a BA in Psychology from Buffalo State University (formerly SUNY College at Buffalo) and a master’s degree in social work from the University at Buffalo. Brenda is a Licensed Master Social Worker (LMSW) and a New York State Credentialed Alcoholism and Substance Abuse Counselor (CASAC). Her professional service includes past participation on the Independent Health Clinical Advisory Group, the Mental Health Subcommittee of the Erie County Department of Mental Health, and the board of the WNY Chemical Dependency Consortium.

Megan Landreth is the lead attorney in Horizon’s in-house legal department. As a key confidant and advisor to Horizon’s senior management team, Megan’s legal practice covers many areas, including:

• Business law, such as formation, development, and affiliations and not-for-profit law matters
• Healthcare and behavioral healthcare law
• Corporate compliance
• Employment law and human resource matters
• Contract negotiation
• Board governance
• Claims management
• Liability Insurances
• Real property transactions and financing arrangements

Bond-secured mortgage transactions with NYS Dormitory Authority

As Government Relations Director, Megan regularly meets with advocacy coalitions and local legislators regarding laws, policies, and regulations related to behavioral healthcare.

Megan received her undergraduate degree from the University of Buffalo and her Juris Doctorate from the University of Pittsburgh. Megan practiced law in Pittsburgh and Nashville before joining Horizon in 2015. She is an active volunteer in her children’s school district and at the University of Buffalo School of Law.

Veronica Meldrum creates and implements HR strategies aligned with Horizon Corporations’ business strategy focusing on HR compliance in talent recruitment, workforce development and retention, compensation and benefits, and employee engagement.

Veronica has spent her career in the healthcare field, holding positions on both the provider and payer sides of the industry. Before joining Horizon’s Employee Services team in 2015, she served as a Board Member and worked in Operations for five years. She worked in managed care, contributing to various functions, including operations, product development, sales, and marketing.

Veronica holds a Master of Science degree from the University at Buffalo. She is a certified Senior Professional in Human Resources (SPHR), a Society for Human Resource Management Senior Certified Professional (SHRM-SCP), and a retired Certified Rehabilitation Counselor (CRC) and Certified Alcoholism Substance Abuse Counselor (CASAC).

Dr. Mure was appointed Chief Medical Officer of Horizon Corporations in January of 2024. Dr. Mure joined the Horizon team in 2018 and has been a leader in the healthcare industry for over 17 years. His focus on the importance of treating the whole patient aligns with Horizon’s treatment philosophy.

“My commitment to medical innovation and patient care has always been top of mind,” Dr. Mure said, “I’ve always thought that the best care for patients with psychiatric and substance use disorders include both clinical and medical care. I am eager to continue driving forward the life-changing treatment Horizon provides to our patients and bring significant impact to those who struggle with mental health and substance use disorders.”

In recognition of his outstanding contribution to the medical field, Dr. Mure has been awarded a Top Doc by Buffalo Spree Publishing for the last 3 years and was honored as an Excellence in Healthcare Professional through Buffalo Business First. Dr. Mure is board certified in both Addiction Medicine and Family Medicine and is a Fellow of both The American Society of Addiction Medicine and The American Academy of Family Physicians.

Given the role of Chief Medical Officer, Dr. Mure will extend his responsibilities by providing cross oversight of Horizon’s medical programs to enhance the delivery of integrated care into our community. He will provide valuable insight of new healthcare regulations and best practices while keeping exceptional quality care and ensuring patients are receiving the highest standard of medical care with their treatment team.

John started his career as a reimbursement analyst in the healthcare field and held accounting positions in manufacturing and distribution before joining Horizon as Controller in 2005. He was named Corporate Director of Finance for Horizon in 2011, moved into VP of Finance in 2021, and was appointed to the position of Chief Financial Officer in 2022.

As Chief Financial Officer, John is responsible for directing the preparation of financial reports, including income statements, balance sheets, reports to shareholders, tax returns, and reports for government regulatory agencies. He also oversees budget preparation, audit functions, and projects company prospects for future growth opportunities.

John is a graduate of Niagara University, where he received his Bachelor of Business Administration in Accounting. He is a member of the Niagara University Athletics Hall of Fame.

Judy Tejada began working at Horizon Corporations in 2006. In her current role, Judy oversees clinical programming for Horizon Health Services and Horizon Village, as well as the growth and development of all clinicians. As the head of the Clinical Services Department, she oversees Horizon University, which provides in-house clinical and non-clinical training for the corporation. Judy is also a co-facilitator of Horizon’s Leadership Training.
Before working with Horizon, Judy worked in college student personnel administration. She has a bachelor’s degree in Political Science from The College of Wooster, a Master’s degree in College Student Personnel Administration from Ohio State University, and a Master’s degree in Counselor Education from Canisius College. Judy is a Licensed Mental Health Counselor (LMHC) and a Certified Alcohol and Substance Abuse Counselor (CASAC).

Since 2003, Don J. Will has developed and implemented strategic and operational plans for Horizon’s Construction and Property Management Departments. He is responsible for project management, administration, oversight, cost estimating, contract negotiation, financial operations of construction, renovation, property management, and facility development.

Don began working at Horizon in 1983 as a Transportation Coordinator and Director of Corporate Support Services. During his time as the executive director of Horizon Initiatives, Inc., Don focused on strategic operations, work training programs, and creating services for houseless individuals who were managing chemical dependency disabilities. Recognition from the State Office of Vocational and Educational Services for Individuals with Disabilities followed this effort.

Don attended Buffalo State College for Business Administration, is a Licensed General Contractor, and is a member of the University Community Initiative, Construction Exchange of Buffalo & WNY, and Clean Cities Committee of Western New York. In addition, Don works with NYSERDA and the NYS Power Authority to develop energy efficiencies to reduce building operational costs.

Jeremy began his career as an outpatient substance use disorder counselor with Horizon Health Services in 2005. Throughout the years, Jeremy has worked as a clinician and manager across Horizon Corporations in multiple levels of care. In his current role, Jeremy oversees operations of the residential programs of Horizon Village. This includes the medically supervised withdrawal and stabilization programs at Terrace House in Buffalo, as well as overseeing each of the residential rehabilitation programs at the Horizon Village Campus in Sanborn. Jeremy also facilitates trainings on substance use and leadership to organizations, schools, and community members.

Before working at Horizon, Jeremy served with the Army National Guard and Reserves as a mechanic. While serving, Jeremy obtained his bachelor’s degree in Psychology from the University of Buffalo and his master’s in Counseling and Human Services from Canisius University. Jeremy is a Licensed Mental Health Counselor (LMHC) and a Certified Alcohol and Substance Abuse Counselor (CASAC).

Gulsum Silluzio is the Vice President of Operations, where she leads outpatient operations and provides executive oversight of medical services—including Psychiatry and Addiction Medicine—as well as the Care Coordination and Peer Support departments. Her leadership is rooted in a strong clinical foundation and a strategic approach to organizational growth and change.

She began her career at Horizon in 2013 after earning her Master’s in Social Work from the University at Buffalo. Gulsum also holds a bachelor’s degree from Canisius College, where she completed a triple major in Psychology, Criminal Justice, and Political Science.

In 2015, Gulsum began her leadership journey as a Clinical Supervisor and quickly advanced through multiple roles—including Program Director, Director of Outpatient Operations, and Corporate Director of Medical Operations—due to her strong operational acumen, collaborative leadership style, and focus on strategic growth and innovation.

Gulsum is known for her ability to implement creative solutions, foster team cohesion, and support sustainable organizational change. She also serves on the Chemical Dependency Consortium Board and is passionate about building resilient teams and cultivating a culture of excellence.

Sara serves as Horizon’s Vice President of HR Operations and Compliance, joining the organization in 2026. She brings a strong background in building people-centered, forward-thinking HR functions across large and complex organizations. With experience spanning HR operations, total rewards, governance, HR technology, and employee relations, Sara has led teams through periods of growth, organizational change, and cultural transformation.

Sara has worked within the Government sector, Manufacturing and Transportation, and Early Childhood Education Industries within the HR concentration for over 20 years.

Sara holds dual Bachelor Degrees of Science from Colorado Technical University. She is a Certified HR Professional holding the Society for Human Resource Management Senior Certified Professional Credential (SHRM-SCP) and Strategic Workforce Planner (SWP) Certification from HCI.