Senior Leadership Team

Scott E. Coffin, Chief Executive Officer

Scott E. Coffin is the Chief Executive Officer (CEO) for Alameda Alliance for Health (Alliance), a publicly operated safety-net health plan that serves more than 270,000 residents in Alameda County. The Alliance is a public entity that is governed by a 15 member Board of Governors appointed by the Alameda County Board of Supervisors. As CEO, Mr. Coffin oversees the entire operation of the health plan and ensures that all Alliance members receive timely access to quality health care and the highest levels of customer service. He has more than 22 years of experience in health care leadership, including health plan management and hospital administration, and has dedicated the last decade of his career to integrating Medicare and Medicaid services, innovating shared savings and gainsharing arrangements, and implementing quality improvement programs. Mr. Coffin serves as a Board Member of Local Health Plans of California and First 5 Alameda County, and continues to develop partnerships with providers that lead to improving the quality of life.

Prior to joining the Alliance, Mr. Coffin served as the Executive Director for Anthem Blue Cross, Northern CA and oversaw the $1.1B operations for over 500,000 Medi-Cal members in 18 urban and rural counties in Northern California. Mr. Coffin founded the DeSante Group LLC, a health care consulting firm that delivered Medicaid and Medicare integration services to state health agencies, health plans, hospitals and physician groups. He also has held leadership positions with the Health Plan of San Joaquin, Blue Shield of California, Sutter Health Hospitals, and Vision Service Plan. Mr. Coffin earned his degree in business administration at California State University in San Bernardino, and continued his professional development and education at Dartmouth College Tuck School of Business.


Matthew Woodruff, Chief Operations Officer


Matthew Woodruff is the Chief Operations Officer at Alameda Alliance for Health (Alliance), with responsibility for all health plan ongoing operations, providing oversight to Claims, Community Relations, Contracting, Credentialing, Data Validation, Facilities, Member Services, and Provider Services. Over the past year, Matthew has worked to reorganize his internal departments and create promotional opportunities for his teams and departments. He has also worked to update and improve the facilities and overall physical workplace environment.

Matthew's experience as a leader in health care has garnered him recognition as Distinguished Service Awardee from the Department of Health and Human Services. He also serves as the Chair of the Membership and Registration Committee for his sons’ local Boy Scouts chapter.

Matthew lives in San Jose, California with his wife, Maria and their two children. When he is not working he enjoys jogging, reading and spending time with his family. Matthew attended St. Mary’s College in Moraga, California and earned degrees in psychology and religious studies.


Gil Riojas, Chief Financial Officer


Gil Riojas is the Chief Financial Officer at Alameda Alliance for Health (Alliance), with responsibility for the overall financial management of the Alliance. This includes oversight of financial budgeting and forecasting, accounting, financial reporting, and other related activities.

Prior to joining the Alliance, Gil worked for more than 15 years at the California Department of Managed Health Care (DMHC) where he oversaw the Financial Review Office and was responsible for monitoring the financial solvency and compliance of over 124 managed care plans in California. Gil also served as an expert reporting to the Department’s Financial Solvency Standards Board and created the Department’s first comprehensive financial analysis report of Local Initiative and County Organized Health Plans. Gil has volunteered as a Core Values Judge for the First Lego League and continues to support his local community food bank and transitional housing program.

Gil lives in the East Bay and when he is not working, he enjoys spending time with his family, hiking, mountain biking and generally all things outdoors. Gil attended Pacific Union College and earned his Bachelor of Science degree in Business Administration. He is a Certified Public Accountant and a member of the California Society of Certified Public Accountants.


Aman Bhasin, Chief Information Officer

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Aman Bhasin is the Chief Information Officer at the Alameda Alliance for Health (Alliance). As Chief Information Officer, Aman provides vision and leadership for developing and implementing information technology initiatives; and directs the planning and implementation of enterprise IT systems in accordance with the mission, vision and core values of the organization.

Prior to joining the Alliance, Aman played a pivotal role in building a startup health plan by architecting strategies, building a technology team, and implementing key systems from the ground up, including care management, enrollment, and claims platforms. He assured that systems were scalable, compliant, and cost effective as 5 lines of business including Managed Long Term Care, Medicare Advantage and D-SNP were launched. Aman serves as a Board Member of the Council for Unity Advisory Board, and a member of the Minority Affairs Council. Aman has also served as a past Board Member of the New York Law Enforcement Foundation, and the past Chairman of both the Medlink International Advisory Board and the American Medical Group Association CIO Council.

Aman lives in the East Bay with his wife and two children. When he is not working Aman enjoys golf, traveling and spending quality time with his family. Aman attended CUNY Baruch College and earned a B.A. in Computer Information Systems. He received a M.S. in Engineering Management from NJIT College of Engineering.


Tiffany Cheang, Chief Analytics Officer

Tiffany Cheang is the Chief Analytics Officer at Alameda Alliance for Health (Alliance), with responsibility for company-wide reporting and analytics to support and ensure data driven decision making across the organization. Prior to joining the Alliance in early 2013, she held Director positions in analytics at HealthNet, Blue Shield of California and North American Medical Management. Tiffany attended the University of California at San Diego and earned her B.A. in Economics. She received a Master of Public Health degree from California State University at San Diego.