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Lisa Mayes, Executive Director

Ms. Lisa Mayes joined the Harris County Healthcare Alliance as the Executive Director in April 2013.  Prior to her role at the Alliance, Lisa served as Director of Government and External Affairs for the Texas Medical Center.  Her background includes more than 25 years of experience in state government and politics, having worked in the Texas House of Representatives and Texas Senate, various state agencies and trade associations, as well as lobbying for a law firm and in-house for a corporation.  Lisa received her BA in Journalism/Radio-TV from Baylor University.

Sylvia Castillo, Executive Assistant

Sylvia Castillo has been the Executive Assistant to the Harris County Healthcare Alliance since January 2010 with the additional responsibility of providing support to TexHealth Harris County 3-Share Plan, Partners for Community Health (P4CH), and Greater Houston Health Information Exchange (GHHIE).  Prior to joining the Alliance, Ms. Castillo was employed with a private alternative education company for 11 years and brings extensive experience to this crucial position.  She brings a wealth of administrative skills and knowledge to all facets of the organization and has thrived in the Alliance workplace as she is unyielding to any responsibilities and challenges to which she is confronted.  During her tenure with the Alliance, she has proven to be an invaluable asset to this multi-faceted role and is loyal and dedicated to furthering the mission and vision of the Alliance.  Ms. Castillo continues to further establish herself with the Alliance and provides valuable contributions to the Alliance team as well as all other entities formed by HCHA.

Diane Arms-Signore, CCFC Program Manager

Diane Arms-Signore joined The Alliance as the Community Clinics Funders' Collaborative (CCFC) Program Manager in July 2014. Prior to coming to The Alliance, she worked as an independent consultant preparing mental health agencies for Joint Commission accreditation in El Paso, Texas. In addition to her experience with privately funded organizations, Mrs. Arms-Signore served as Operations Administrator for a not-for-profit children’s behavioral health clinic under the El Paso Local Mental Health Authority, Emergence Health Network. She received her Master’s from the University of Texas at El Paso in 2009. She has received several grants to support her research, which consists of evaluating Health Related Quality of Life in the Colonias, Advancing Latinos Professional Development, using a web-based program to assist with smoking cessation and Efficient Colorectal Cancer Screening Aids. She is delighted to become part of The Alliance and collaborate with its members.

Stephen Collazo, Project Manager

Stephen Collazo, MSSW, LCSW is the Project Manager for the Harris County Healthcare Alliance, overseeing a variety of collaborative projects throughout Harris County involving the Alliance as a whole. A graduate of Texas A&M University with Bachelors of Science in Psychology, Stephen also received a Masters of Science in Social Work specializing in community and administrative leadership from the University of Texas. His previous experience includes clinical and administrative social work roles at MD Anderson Cancer Center. Stephen is also a former national board member of the Society for Social Work Leadership in Health Care and the current president-elect for the Texas Chapter.

Tim Schauer, Policy Advisor

Tim Schauer is on staff with Cornerstone Government Affairs and contracts with the Harris County Healthcare Alliance as Policy Advisor.  Tim is a co-lead of Cornerstone’s flagship Texas office in Houston. He has more than 20 years of government relations experience working in both Austin and Washington, DC. Tim has advocated for a broad range of policy issues including health care, health insurance, public health, tort reform, education, water financing and craft beer. Tim has played a pivotal role in guiding the advocacy efforts for Community Health Choice, Nexus Health System, Memorial Hermann Healthcare System, the Texas Association of Community Based Health Plans and Open the Taps. In addition to his direct advocacy efforts, Tim specializes in public policy development with community organizations, as exemplified by his formative work with Healthy Living Matters - a Houston collaborative focused on solving childhood obesity. Tim’s collaborative style and upbeat leadership skills were recognized when he was selected to chair the Greater Houston Partnership’s Federal Relations Committee for three consecutive years.