Gregg Garrison

Doctors Hospital of Manteca names new Chief Financial Officer
Doctors Hospital of Manteca has appointed Gregg Garrison as its new Chief Financial Officer.
“Gregg brings a high level of expertise to support our financial and growth strategies as we expand to meet the needs of our growing community,” said Murali Naidu, M.D., CEO of Doctors Hospital of Manteca. “He has many years of experience in understanding the various services we provide from a financial perspective and we are thrilled to have him on our team.”
Garrison was the CFO at Emanuel Medical Center in Turlock, a sister hospital of Doctors Hospital of Manteca, and will now serve as CFO over both hospitals. Prior to joining Emanuel in 2020, Garrison served as CFO for HCA Houston Healthcare West for nearly 11 years, CFO for Spring Branch Medical Center in Houston, Texas, and CFO for Twelve Oaks Medical Center, also in Houston. He’s no stranger to Manteca. Garrison served as CFO of Doctors Hospital of Manteca for two years from 1995-1997.
Garrison earned his Bachelor of Science degree in Business Administration from the University of Central Missouri in Warrensburg, Missouri, as well as his Master of Business Administration degree from the same university. He also completed graduate studies in Health Services Administration at the University of Kansas. Garrison is affiliated with the American Institute of Certified Public Accountants and the Healthcare Financial Management Association.

Doug Roszel

EMC and DMC recognize Tenet Heroes
Emanuel Medical Center and Doctors Medical Center have named Clinical Informatics Director Doug Roszell, Susan Ybarra, RN, NCCU Shift Manager, and Ricky Villavicencio, RN, Clinical Operations Coordinator, have all been honored by Tenet Healthcare as part of its annual recognition program “Tenet Heroes” for their contributions in 2020.
The Tenet Heroes program celebrates individuals who make a meaningful impact within their respective communities that goes above and beyond their daily job responsibilities. Nominated by fellow colleagues, Tenet Heroes exemplify the company’s core values and key tenets of its Community Built on Care.
Roszell was recognized as a Tenet Hero for his dedication and hard work. One year ago, as hospitals were beginning to navigate the COVID-19 pandemic, Emanuel was keeping a strong focus on its supply chain management. When asked to take over the warehouse, Roszell stepped up and accepted the challenge without hesitation. He brought his skillset of infrastructure and a data-driven approach to help prevent and resolve any potential issues within the warehouse.
“Doug has inspired us through his actions to make a positive and meaningful difference in our community,” said Lani Dickinson, CEO of Emanuel Medical Center. “We are grateful for Doug’s efforts, selfless nature and commitment to compassionate care particularly throughout the COVID-19 pandemic, and we are proud to work alongside him.”

Susan Ybarra

Ybarra was recognized as a Tenet Hero because of her amazing efforts introducing Honor Walks at Doctors Medical Center to honor organ donors and provide closure for their loved ones and their care teams. Viilavicencio was designated as the hospital’s ECMO program lead and after ten months of planning, training and preparation, Doctors Medical Center launched its life-saving ECMO program.

Ricky Villaviencio


“Susan and Ricky have both inspired us through their actions to make a positive and meaningful difference in our community,” said Warren Kirk, CEO of Doctors Medical Center. “We are grateful for Susan and Ricky’s efforts, selfless nature and commitment to compassionate care particularly throughout the COVID-19 pandemic, and we are proud to work alongside both of them.”
Each year, a smaller group of nominees are inducted into the Tenet Heroes’ Hall of Fame, the company’s most prestigious honor for employees. In addition to being recognized as a Tenet Hero, Ybarra was also selected as a Hall of Fame winner. This year, a total of 24 individuals across the country were named to the Hall of Fame.

Stockton, Modesto residents appointed to serve as judges
Erin E. Guy Castillo, 40, of Stockton, has been appointed to serve as a judge in the San Joaquin County Superior Court. Guy Castillo has served as a commissioner at the San Joaquin County Superior Court since 2018. She was a partner and an attorney at Parish Guy Castillo PC from 2014 to 2018. Guy Castillo was an associate at William H. Parish PC from 2009 to 2014 and at Dowling, Aaron & Keeler Inc. from 2007 to 2009. She earned a Juris Doctor degree from the University of San Francisco School of Law.
Marcus L. Mumford, 51, of Modesto, has been appointed to serve as a judge in the Stanislaus County Superior Court. Mumford has served as a deputy public defender at the Stanislaus County Public Defender’s Office since 2001. He was a sole practitioner from 2000 to 2001 and a law clerk at the San Diego County Superior Court from 1997 to 2000. Mumford earned a Juris Doctor degree from the Thomas Jefferson School of Law.

Christine Chan

Court reporter earns national certification
Stockton native Christine Chan has earned the nationally recognized Registered Professional Reporter certification, having demonstrated her ability to produce a high-quality verbatim record. RPR certification distinguishes stenographic court reporters as being among the top contributors to the profession in terms of reporting skills, transcript production, reporting and operating practices, and professionalism.
Earning RPR credentials is quite an accomplishment given the amount of preparation and knowledge that successful candidates must possess to pass. Those who hold RPR credentials are not only among the top stenographic court reporters in the profession, but they also embark on a path of lifetime learning with continuing education requirements.
Chan currently works as a freelance deposition reporter in the Los Angeles area. She is also a licensed Certified Shorthand Reporter for the state of California.