Donna Riley joined Stanislaus County government in 1993 in the Treasurer-Tax Collectors’ office as the Assistant Treasurer. As Assistant Treasurer, she managed daily cash and investments for the County until 2006, when she moved to the General Services Agency. She was elected Treasurer-Tax Collector in June 2018 to collect property taxes and other debts owed the County, in addition to overseeing $1.5 billion in short-term investments. Ms. Riley serves on both the StanCERA Board of Retirement and the Stanislaus County Deferred Compensation Committee.
Ms. Riley graduated from San Francisco State University in 1985 with a Bachelor of Science in Applied Economics and a Bachelor of Arts in Business Analysis. Prior to joining Stanislaus County, Ms. Riley managed increasingly larger cash and investment portfolios in private industry.
Donna and Donald Riley married in 1986 and raised their son, Thomas, who completed his master’s in computer science at Johns Hopkins University. Ms. Riley is a member of Modesto Rotary and serves on the Modesto Symphony Board.
Mandip Dhillon is a Certified Public Accountant (CPA) with an extensive background in banking and management. He is currently an Assistant Director at Stanislaus County Behavioral Health and Recovery Services.
He began his public sector employment in 2001 as an Accountant at Stanislaus County Behavioral Health and Recovery Services. He continued his career with Stanislaus County promoting to the Waste-to-Energy Project Manager in 2005 and Solid Waste Division Manager in 2010 at the Department of Environmental Resources. In 2013, he joined the Chief Executive Office as a Senior Management Consultant. He promoted to his current position as Assistant Director in 2017.
Prior to his employment with Stanislaus County, Mr. Dhillon was a Customer Service Manager for Retail Banking and Investment Services for Bank of the West for 12 years in various Bay Area and central valley locations.
He graduated with Magna Cum Laude honors from California State University, Stanislaus in 2002 with a Bachelor of Science Degree in Business Administration with an emphasis in Accounting. He has been a licensed Certified Public Accountant (CPA) since 2005.
He was elected to the Stanislaus County Employees Retirement Association Board by the general members on February 6, 2016.
Mr. Dhillon lives in Salida, California.
Jeff Mangar brings a unique experience working as a Trustee for StanCERA. Jeff has been a Stanislaus County Deputy District Attorney for over 21 years and is currently a Chief Deputy District Attorney assigned to prosecute aggravated white-collar crimes in the Real Estate Fraud Unit. Jeff received his Juris Doctorate (J.D.) degree from Thomas Jefferson School of Law in 1997. He obtained his undergraduate degree from the University of California, San Diego in 1993. Jeff is a Certified Legal Specialist in Criminal Law by the State Bar of California, Board of Specialization; and a past Bar Exam grader.
Mr. Mangar is a licensed real estate broker who works with investigators and forensic accountants to uncover fraudulent schemes such as securities fraud, bank fraud, and accounting schemes that manipulate financial data. He often works these complex financial investigations with the FBI, US Attorney, and Attorney General’s Office.
Mr. Mangar is also actively involved in numerous professional associations. He is the current President of the Stanislaus County Bar Association. Jeff is also the current President of the Stanislaus County Prosecutor’s Association. He is the Past President of the Stanislaus County Peace Officers’ Association, the only association comprised of every law enforcement agency in Stanislaus County.
Jeff Mangar has attended the State Association of County Retirement Systems (SACRS) program on “Modern Investment Theory & Practice for Retirement Systems” at UC Berkeley’s Haas School of Business. Classes included how to best diversify risk and generate higher returns; the predictability of long term asset returns; advanced portfolio analysis; alternative asset classes to protect against downside risk; alternative strategies to generate both alpha and uncorrelated returns;
avoiding the pitfalls of behavioral biases; and recent cases defining fiduciary duties.
Mr. Mangar has been part of StanCERA’s Internal Governance Committee which has the responsibility for oversight of all financial audits (both external and internal), compliance audits, bylaw revisions, policy revisions, retirement board member education and training (including ethics), and other internal governance matters.
Jeff Mangar has been enthusiastic to work with StanCERA to develop solutions to ever changing challenges and has been a great asset to the Board since 2018.
Prior to joining the Center, Mr. Lynch owned and operated Mike Lynch Consulting. Mr. Lynch has extensive public policy and political experience at all three levels of government, local, state, and federal. In 1989, when Assemblyman Gary Condit was elected to the United States Congress, Mr. Lynch became his chief of staff, responsible for legislative and district office operations. Mr. Lynch worked in that capacity until opening his firm in 2003.
Born in Sacramento, Mike Lynch worked five years as administrative assistant to a member of the Sacramento County Board of Supervisors before moving to the Office of Majority Services in the California State Assembly. In the Assembly, Mr. Lynch worked on the personal and caucus staff of members and as chief consultant to a legislative committee.
Mike Lynch graduated from Santa Clara University. He and his wife, Ana, a high school teacher, live in Turlock. He serves as a Stanislaus County Supervisors’ appointee to the Stanislaus County Retirement Association governing board and is a member of the Tuolumne River Citizens Advisory committee. Mr. Lynch is also a member of the Board of Directors of the Turlock Chamber of Commerce.
Mr. DeMartini was born and raised in Stanislaus County. He graduated from Grace Davis High School. He has been farming since 1972 and he farms more than 1000 acres on the West Side between Patterson and Ceres. He grows almonds, walnuts, peaches, grapes and row crops.Jim DeMartini serves on the Board of the Gateway Rotary, the Board of the American Heart Association and is a member of the Elks Club. He is on the Central Valley High School Bond Oversight Committee, and is a past chairman of this committee. Mr. DeMartini is a member of the Stanislaus County Farm Bureau, the Latino Community Roundtable and the Patterson, Newman and Ceres Chambers of Commerce. Mr DeMartini is also chairman of the Republican Party of Stanislaus County. In 2004, he was elected to the Stanislaus County Board of Supervisors District 5.
Mr. DeMartini’s wife Anne serves as a trustee for the Yosemite Community College District and she is a member of the Modesto Symphony Orchestra
Joshua Clayton was born and raised in the central valley of California. He graduated from Johansen High School in 2000 and attended Modesto Junior College before joining the Stanislaus County Sheriff’s Office in 2005. He is currently the Chief of Police for the city of Patterson, a contract city of the Stanislaus County Sheriff’s Office. During his tenure at the Sheriff’s office he has worked as a patrol operations deputy, detective, court bailiff and contract city deputy serving the communities of Patterson and Hughson. He was also a member and team leader on the SWAT team for over 10 years. He is currently in charge of the Hostage Negotiation Team (HNT) and Major Accident Investigation Team (MAIT).
In 2011 Josh decided to attend law school. Due to his work situation he elected to attend Humphrey’s Laurence Drivon School of Law in Stockton. The school offers a night program for working students. He made the drive three nights a week for approximately three and a half years after work to school. During his time at the Laurence Drivon School of law Josh participated in the Inns of Court and he graduated as the salutatorian. Josh sat for and passed the February 2015 California Bar exam. He was admitted to the California Bar thereafter. He practices in the area of estate and business planning.
In his free time Josh travels. As much as possible. Although sidelined by COVID-19 some his recent destinations include the UK, Canada and Italy. When he is not travelling you are likely to find him in the gym or riding an electric skateboard with his dog. Relying on his skills learned in law school, Josh has helped set up and maintain several non-profits in the area that help improve our community. Josh is especially involved with the Women’s Education and Leadership League (WELL) with his wife, Alana, whose mission it is to empower women.
Employee Elected by Safety Members
Alternate to Seat No. 7
Term: 3 years
Mr. O’Neal began his employment with Stanislaus County in 1969 with the Department of Social Services, working there until 1972. From there he owned several small businesses, worked in the Purchasing Department for Mendocino County, for North Coast Opportunities as the Senior Programs Coordinator and had a brief employment with Merced County. Upon his return to Stanislaus County in 1981, Mr. O’Neal worked in the Social Services Department where he managed several programs and served as the Assistant to the Deputy Director. He spent his final stint in county service as a Manager in the Department of Employment and Training.Mr. O’Neal has served on the Stanislaus County Grand Jury, the Empire Fire Board and is the past president, as well as an active board member, of the Retired Employees of Stanislaus County (RESCO).
Mr. O’Neal was born in Bakersfield, California and grew up in Modesto, California. He attended local schools and received his Associate in Arts from Modesto Junior College and his Bachelor in Arts from California State University Stanislaus. Michael lives in Oakdale with his wife Carolyn, who retired as a manager from Stanislaus County Child & Family Services. They belong to the Modesto Regional Horseless Carriage Club of America and enjoy travel, gardening, spending time with friends, and touring in their Model A.
During Ms. Biesemeier’s 36-year career with Stanislaus County, she worked primarily for the Community Services Agency, retiring as a manager in the StanWORKs Division in March 2008. From 1981 through 1992, Ms. Biesemeier worked as a Family Support Officer for Child Support Services. After retirement, Ms. Biesemeier worked for CPS HR Consulting – Merit System Services, as a Panel Chair on Qualification Appraisal Panels throughout the state.Ms.
Biesemeier is currently Past President of Retired Employees of Stanislaus County (RESCO) and served as President/Co-President from 2009-2019. She also serves as Delegate and Membership Chair for the California Retired County Employees Association (CRCEA) and has since 2010. She was elected to the Stanislaus County Employees Retirement Association Board by retirees as the Alternate Retiree Representative in August 2017.
Ms. Biesemeier was raised in Modesto, attended Grace M. Davis High School and Modesto Junior College. She has two adult children who are very dear to her. Ms. Biesemeier enjoys traveling, playing with her pets, getting to know new people, and participating in community events.
Mr. Grover is President and owner of Solecon Industrial Contractors, which was established in 1981. The company provides mechanical systems and services to the plants, factories, hospitals and general contractors in the Central Valley of California. Mr. Grover is a director for Partners International, a Christian mission organization and also serves as a board director for the Workforce Alliance, Stanislaus Surgical Hospital, the Stanislaus Community Foundation and Nexus Engineering.He has been actively involved in Stanislaus County business and civic organizations for a number of years, including serving as a member of the board of directors of the Modesto Commerce Bank, 5.11 Tactical, Modesto Chamber of Commerce, the McHenry Mansion, Doctors Medical Center Foundation, the Salvation Army Advisory Board and the Modesto Rotary Club.
Civically he has served on the City of Modesto Planning Commission and the Board of Zoning Adjustments and was the Stanislaus County Grand Jury foreman in 1992. He served in publically elected office as a Stanislaus County Supervisor for two terms, 2003-2010.
Mr. Grover enjoys travel, fishing, golf and snow skiing. He and his wife Elaine have three daughters; Sarah, Rachel and Emma.