Courtney A. Ruby, CPA, CFE
City Auditor
Auditor Ruby assumed office as Oakland's elected City Auditor on January 1, 2007. She is a Certified Public Accountant who began her career with Deloitte & Touche. As City Auditor, she is the citizens' watchdog, holding government accountable and requiring efficiency and effectiveness in city processes. Read her full bio.

Yiaway Yeh, MPP
Assistant City Auditor
Assistant City Auditor Yeh has broad experience in municipal operations and financial management.  Previously a management consultant with Harvey M. Rose Associates, his performance auditing, budget analysis, and consulting project experience includes the cities of San Francisco and Los Angeles, as well as the counties of Los Angeles, Sutter, and Miami-Dade.  He holds a Master in Public Policy from Harvard's Kennedy School of Government and brings a degree of government savvy as a Palo Alto City Councilmember.

Tammy Willis
Performance Audit Manager
With more than ten years of performance auditing experience, Tammy is a former US Department of Justice, Office of the Inspector General auditor, where her work included high profile audits such as FBI Management over Weapons and Laptops and US Marshals Service Administration of the Witness Security Program. She was awarded the Inspector General's Award of Honor in 2001. She has been an Oakland resident for five years.

Melanie Nuni
Senior Performance Auditor
Melanie holds a degree in Business Administration from the Haas School of Business at UC Berkeley and has four years of auditing experience. She joined the Office after working at PricewaterhouseCoopers. An Oakland resident for five years, she enjoys being a part of a team that is making a difference in the City of Oakland.

Isabel Sobozinsky-Wall, MPA
Senior Performance Auditor
Isabel came to the Office of the City Auditor from the U.S. Department of Justice, Office of the Inspector General, where she received the Inspector General's Award of Honor in 2005. She holds a Masters in Public Administration and has more than seven years experience in governmental auditing. She is an active member of the Institute of Internal Auditors (IIA).

Philip Lim
Performance Auditor
Philip has been an auditor in the Office of the City Auditor since 2003. He holds a Bachelor of Arts in Economics from UC Berkeley. Before joining the City of Oakland, Philip worked as an Associate for PricewaterhouseCoopers. He currently lives in Berkeley and enjoys volunteering for Earth Day and Creek to Bay Day.

Lateeshi H. Dixon, MBA
Performance Auditor
Lateeshi holds a Master's in Business Administration and has taken coursework in pursuit of a Doctorate in Business Administration. She has served the City of Oakland as an auditor for three years and believes performance auditing is important because it allows for transparency and accountability within City government.

Joseph D. Macaluso, MPA
Executive Assistant to the City Auditor
Joe holds a Master of Public Administration (cum laude) from Norwich University and a Bachelor's degree from San Diego State University with a double major in Communication and Political Science. He has more than eight years experience in the political and public relations industries and has provided executive staffing, project management, and strategic communications consulting to private companies, public agencies and political candidates/ballot measures.

Jo Ann Tipton
Receptionist to the City Auditor
Jo Ann has more than 30 years experience in support roles for both public and private institutions and has previously worked for the City of Oakland in the Fire Prevention Bureau and Contract Service Administration. She has served on the Executive Quality Council for American President Lines, LTD, as well as a board member for her local church and school.