Board of Directors

Guido Rietdyk
President/Chairman

Born and raised in The Netherlands, Guido moved to California to complete his undergraduate degree in International Business at San Jose State University in 1986.  After completing military service as a 1st Lieutenant and Platoon Commander with the Royal Dutch Army stationed in Germany, he moved back to California to earn his MBA with a concentration in Brand Management from the University of Southern California.  Residing in Rolling Hills, Guido is married with three children. His hobbies include soccer, war bird airshow and aerobatics flying with the Torrance-based Tiger Squadron, vintage car racing, fine wines and modern art.  Very active in the community, Guido is President of the Board for the Cancer Support Community Redondo Beach. 

Deborah Patrick
Sr. Vice President/President Elect

Board member since 2016, Deborah joined the Cancer Support Community Redondo Beach in 2013 after her husband was diagnosed with esophageal cancer.  A cancer widow and cancer survivor herself, Deborah has become a vocal advocate for CSCRB’s mission and programs.  A retired engineering manager from Raytheon with more than 30 years of technical, cost and personnel management experience, Deborah is also a court-appointed special advocate for abused and neglected children in the Los Angeles County dependency system. Additionally, she is a Purdue University Women in Chemical Engineering Ambassador and a member of the Cal Poly San Luis Obispo Industry Advisory Board for the Women’s Engineering Program.

Sacha Ohara
Vice President/Secretary

Sacha Ohara is SVP/Branch Administrator of Malaga Bank, a local community bank serving the South Bay. A member of the bank’s senior management team, Sacha is responsible for the retail banking branch network and operations, as well as managing the bank’s corporate and community involvement. A lifetime resident of the South Bay, Sacha was previously employed as a teacher in both the Torrance and Palos Verdes Unified School Districts and is well known in the community to both parents and students alike. 

Preston Gegenfurtner, CPA
Vice President/Finance

Preston, an Attest Director at PDM CPAs, has over ten years of experience performing audits and reviews for non-profit organizations and commercial businesses.  Prior to PDM, he spent three years working in the accounting department of a community credit union.  He has a Bachelor’s degree in accounting from Cal State Long Beach and a Masters in Business Administration from Pepperdine University.  He has proudly served as VP Finance of Cancer Support Community Redondo Beach since 2013.

Josh Cohen, Officer

Josh Cohen is Principal of The Cohen Group, which specializes in the sale of multi-family properties in the South Bay and throughout Los Angeles County. A graduate of UCSB and the University of Michigan, Josh lives in Redondo Beach with his lovely wife and three children.  He enjoys music and plays guitar in a local classic rock cover band.  Josh has been a board member since 2018 and is a thyroid cancer survivor.

Michael Fiore, Officer

Michael is a veteran healthcare services executive who has spent the last 37 years in physician-driven businesses. In 2002, Michael co-founded Vantage Oncology, a cancer care management company and developer/ operator of multi-specialty oncology treatment centers, and served as Chairman and CEO until McKesson acquired the business in 2016.  Starting his healthcare career at American Medical International, a publicly traded hospital operator that is now a part of Tenet Corporation, Michael then spent 11 years at Salick Healthcare, a publicly-traded operator of outpatient cancer centers and dialysis clinics, ultimately serving as COO prior to its sale to Astra-Zeneca. He then served as CEO of Interdent, a dental service organization. Michael has served on the Boards of Titan Health Care, a developer and operator of outpatient surgical centers, which was acquired by US Surgical Partners, and Cadent, Inc., an Israeli-based technology company that developed solutions for the dental industry, which was sold to Invisalign. Michael currently serves on the board of California Cryobank and remains a senior advisor to McKesson. He holds a Bachelor of Arts in Economics and Anthropology from Amherst College, a Master of Science in Accounting from New York University, and a master’s in business administration from Harvard University.

Rene Gilberston, Officer

A judge for the Los Angeles Superior County Superior Court, Rene was elected to the bench in June 2018 and was then appointed to a judicial position by former Governor Jerry Brown. She received her B.A. from Wake Forest University in 1989, and her J.D. from Wake Forest University of Law in 1992. Rene began her legal career in 1993 as a staff attorney for the Alliance for Children’s Rights, an organization that provides pro bono legal services to protect the rights of impoverished, abused and neglected children. She was named the Interim Executive Director for the Alliance in 1995, and then joined the Children’s Law Center in 1996 as a staff attorney, where she represented children in the juvenile court system. In 1999, Rene became a deputy county counsel at the Los Angeles County Counsel’s Office, where she continued her work litigating child abuse and neglect cases on behalf of the county. Rene ultimately became a principal deputy county counsel, where she supervised attorneys in the courtroom. She also served as an advisor to the Sheriff’s Department as well as the Los Angeles County Executive Office of the Board of Supervisors. She was appointed to the Superior Court in 2018.

Steven Griswold, Officer

Steven Griswold is an award-winning insurance broker, published author and President and CEO of Griswold & Griswold Insurance Agency, a specialty insurance brokerage focusing on providing innovative and unconventional business solutions to clients in all industries. Steven serves on the board of the Cancer Support Community Redondo Beach, is current Chairman of the Palos Verdes Peninsula Chamber of Commerce, and regularly devotes time to several other local nonprofit organizations, having recently been honored in 2018 as “Volunteer of the Year” by the Palos Verdes Peninsula Chamber. In his spare time, Steven pursues passions such as writing (he is co-author of Breakthrough Leadership and is currently working on his first fiction novel), cooking and spending time with his wife, young child and rescue dog, Gidget.

Maureen Hazard, Officer

A seasoned corporate communications professional, Maureen most recently managed internal communications and several leadership and rotational development programs for the HR Department at Toyota Motor Sales.  She also has held account management positions at several large advertising agencies and design firms in Southern California. She holds a Bachelor of Arts degree in Communication from Stanford University and attended the University of Southern California Business School’s Institute for Advanced Advertising Studies.  Maureen now dedicates her time to volunteer work, sitting on the boards of the Cancer Support Community Redondo Beach as well as that of the Peninsula Committee Children’s Hospital. Her interests include golf, reading, writing and travel. Hazard resides in Palos Verdes Estates with her husband and has four grown children.

Daniel Hovenstine, Officer

Dr. Hovenstine fully retired from Radiation Oncology in 2016 after 30 years in practice of which 25 years were here locally at Torrance Memorial Medical Center.  He has been involved with CSCRB since the early 1990’s and has been a member of the Board of Directors for more than 20 years including a past term as Board Chairman/President. He is enjoying a busy retirement primarily missing only his patients and colleagues, but values his continued ability to participate in their care and association through CSCRB.

Wade Nishimoto, Officer

A board-certified medical oncologist, Dr. Nishimoto also specializes in Hematology and has been in private practice at the California Hematology Oncology Medical Group for over 30 years. After completing his undergraduate studies with a B.S. in Microbiology/Immunology at the University of Washington in Seattle, Dr. Nishimoto finished his Internship, residency, and fellowship in oncology and hematology at the University of California, Irvine Medical Center. Originally from sunny Hawaii, Dr. Nishimoto transplanted to Southern California in 1984, and brings his own version of the Aloha spirit to the practice of oncology. Dr. Nishimoto joined the Cancer Support Community Board of Directors in 2010 and is currently serving as Chair of the Professional Advisory Board.

Patricia Sacks, Officer

Patricia’s medical journey began at Tufts University School of Medicine, where she was one of five women in a class of 90. She recently retired as the Director of the Vasek & Anna Maria Polak Breast Diagnostic Center at Torrance Memorial Medical Center.  Under her leadership, three satellite breast diagnostic centers were opened with Torrance Memorial in Carson, Manhattan Beach and Rolling Hills Estates.  Patricia joined the board shortly after CSCRB opened and providing support programs in 1997.  She served as the first Chair of the Professional Advisory Board, consisting of 19 cancer related physicians in the South Bay and Long Beach.  She has also been an ongoing board member and generous supporter for our organization since 1987. 

Layton John (L.J.) Stogsdill, Officer       

A California native and proud graduate of the University of Southern California, L.J. was founder and CEO of Photo Sciences Inc., a manufacturer of computer peripheral equipment, until his retirement in 2012. Previously he held positions at Livetti LTD and Allied Research and Engineering in Los Angeles and is a distinguished veteran who served in the US Airforce. L.J. joined the Cancer Support Community Redondo Beach when his wife Sheila was diagnosed and later became a board member in 2000, having been a past Chairman.

Kelli Vieweg, Officer

Kelli has an extensive background in Human Resources, Information Technology and Finance, having worked many years in the banking, aerospace and consumer products industries.  A PHR and SHRM-CP certified Human Resources professional, Kelli started CMCK, LLC, an HR Consulting company in the South Bay after deciding not to relocate to the East Coast with a previous company. Kelli’s family has been impacted by cancer including two grandparents and her mother, who is a breast cancer survivor.  Being able to use her skills for the Cancer Support Community Redondo Beach and contribute in any way she can to support the mission inspires her.  Kelli holds a Bachelor of Science degree in Business Administration from the University of Southern California and grew up in the South Bay, along with her husband, both of whom were active in the community as they raised their two children. 

Kyle Kazan, Officer

Kazan began his career in law enforcement where he garnered his expertise in gang and drug identification / eradication. Soon thereafter, he was an advocate to end the war on drugs as a speaker for Law Enforcement Against Prohibition (LEAP). In 1991, Kazan began investing in distressed real estate and launched a total of 23 Private Equity funds.  The estimated value of properties currently owned and under management is more than $2 billion.  He served as a founding director for two opportunistic real estate funds, Grand River Properties and Dalton Berlin, which were based in Shanghai and Berlin, respectively.  Starting November of 2016, Kazan switched his focus to the regulated cannabis industry, and has since successfully closed four funds.  These funds consolidated into Glass House Group, which has assembled a portfolio of vertically-integrated assets.  Kazan holds a BA degree from the University of Southern California.

Jim Hunter, Officer

Jim Hunter is a long time South Bay resident and has been very involved in his community as a member of the Manhattan Beach Rotary since 1992 (President 1996-97) and board member of the Providence Little Company of Mary Foundation and Board member of John Wayne Cancer Center Brain Trust. Jim retired from family-owned Web Service Company, multi-family laundry service after 39 years. He is active in Tour de Pier and a financial supporter through the Uncle Kory Foundation. Jim is also on the board of University of Arizona Foundation. Jim joined the CSCRB Board in 2014.

Tom Hiatt, Officer

With a broad education that includes chemical engineering, law and business, Tom is a retired Vice President of a Fortune 500 company and is a firm believer in giving back to his community.  He has dedicated his time to serving on several hospital boards over the years and currently sits on those of Little Company of Mary Medical Centers in Torrance and San Pedro, serving on their strategic planning & finance and patient experience & quality committees.  In addition to his board work for the Cancer Support Community Redondo Beach, Tom also is president of a large home owners association and has chaired a regional think tank, an education foundation and two medical malpractice insurance companies.  A 19-year cancer survivor, Tom is married with two children and two grandchildren, and resides in Rancho Palos Verdes.

Kerry Brentlinger, Officer

Kerry has been a member of the Cancer Support Community since 2004. He joined the board after his wife Sharon received immeasurable support from the Cancer Support Community during her cancer treatment. He is a senior manager with Northrop Grumman and grew up in the South Bay. Kerry currently resides in Redondo Beach with his wife Sharon.