Janet Sutter, CIA, CFE

Executive Director
(714) 560-5591

Janet joined OCTA in July 2008 as a senior section manager and was appointed Executive Director of Internal Audit in June 2011. She manages the department's five staff and is responsible for developing an annual risk assessment and audit plan, providing audit reports to the Board of Directors, interfacing with regulatory and financial auditors, and administering OCTA’s Fraud Hotline. Janet has over twenty-five years’ experience in internal audit including two years as the audit director for Wescom Credit Union, seven years as a deputy city auditor for the City of Long Beach, and two years as an audit manager with Ernst & Young. She received her Bachelor of Science in Finance from California State University, Northridge and is a Certified Internal Auditor and Certified Fraud Examiner.

Serena Ng, CPA, CIA

Senior Manager, Internal Audit
(714) 560-5938

Serena joined OCTA’s Internal Audit Department in October 2003. She performs contract audits, operational audits and internal control reviews. She also performs pre-award analysis of contractors’ price proposals and is the Department’s specialist in Federal Acquisition Regulations. Over the years, Serena has developed the Department’s procedures for conducting these reviews and has trained OCTA procurement staff on appropriate methodologies for evaluating elements of contractor price proposals. Serena obtained her Certified Internal Auditor (CIA) certification while at OCTA. Prior to joining OCTA, Serena worked as a financial statement auditor at the public accounting firm of Deloitte & Touche and is a licensed Certified Public Accountant in the state of California. She received her Bachelor of Arts degree in Business Administration with a concentration in Accounting from California State University, Fullerton....

Ricco Bonelli, CIA

Principal Auditor, Internal Audit
(714) 560-5384

Ricco joined OCTA in November 2006. He is responsible for conducting a variety of audit engagements at OCTA including operational reviews, contract compliance audits, and pre-award audits. He has developed particular expertise in Buy America program requirements. Prior to joining OCTA, Ricco served three years with the public accounting firm of Macias, Gini, O'Connell, LLP, where he worked primarily on local government, Securities and Exchange Commission, and non‑profit audit and attestation engagements. He received both his Bachelor of Science in Accounting and his Masters of Accountancy from the University of West Florida.

Gabriel Tang, CPA

Principal Auditor, Internal Audit
(714) 560-5746

Gabriel joined OCTA’s Internal Audit Department as a Principal Internal Auditor in December 2011. He is responsible for managing and coordinating OCTA's annual financial and compliance audits. He also performs contract audits, operational audits, and internal control reviews. Prior to joining OCTA, Gabriel worked as a governmental financial audit manager at the public accounting firm of Caporicci & Larson specializing in financial audit, single audit, redevelopment agency audit, and transportation related audit. He has over 10 years of accounting and auditing experience and is a licensed Certified Public Accountant in the State of California. Gabriel received his Bachelor of Arts degree in Business Economics with a concentration in Accounting and a specialization in Computing from the University of California, Los Angeles.

Jonathan Thompson

Staff Auditor, Internal Audit
(714) 560-5930

Jonathan Thompson joined OCTA’s Internal Audit Department as a Staff Auditor in November 2021, after serving three years in OCTA’s Government Relations Department as a Business Unit Analyst. He was promoted to Senior Auditor in September 2026. Prior to OCTA, Jonathan worked in Accounts Payable at College of the Canyons and with the Ventura County Sheriff’s Office of Emergency Services monitoring Homeland Security Grant reimbursement requests. Jonathan holds a Bachelor of Arts degree in Government from California State University, Sacramento, and a Master of Public Administration degree from California State University, Northridge.