National Commercial & Hotel Division
Meet the team that works relentlessly to challenge property tax assessments, uncover savings opportunities, and advocate for commercial property owners.
Division Directors
Andrew Choy, CHIA
Managing Director of National Property Tax
Abraham Tieh, MBA, CHIA
Director of National Commercial Property Tax
National Team

Jenny Le
National Operations Manager

Peter Bach
Licensed National Commercial Property Tax Consultant

Melissa Colmenero
National Marketing Coordinator

Jai Barlow
National Accounts Manager

Aaron Williamson
Senior National Commercial Sales Associate

Kenisha Rowe
National Business Development & Client Relations Associate

Anna Le
National Accounts Associate
Leadership
Patrick O'Connor
MAI, Owner and President
Patrick O’Connor has been active in reducing property taxes, providing expert witness testimony and appraising commercial real estate property since 1983. Pat is active in publishing analyses and data with respect to the real estate market, while being a highly regarded media spokesperson for the real estate community. He holds a MAI, the highest achievable designation from the Appraisal Institute, and is a licensed senior property tax consultant. Pat earned a Master of Business Administration from Harvard University. In 2001, he authored the first definitive consumer guide to Texas property taxes, Cut Your Texas Property Taxes.

Kathleen O’Connor
Owner
On a conservative basis, Kathleen O’Connor manages the financial operations of the company. Working with outside accountants, Kathleen authorizes annual financial statements and projections. She monitors and reviews all expenditures, helps develop financial policies and procedures, and oversees payroll functions. Kathleen is a graduate of Baylor College, is a licensed Real Estate Broker and is very active in CREW. For more than twenty years, she has been an active participant in O’Connor, taking pride in its growth from a small firm to a company with a national reputation and more than 600 local and international employees.

Ravi Muthukrishnan
Chief Financial Officer
Ravi has more than 35 years of experience in the field of finance and accounting. He has supported O’Connor through the company’s Pathfinder subsidiary since 2019. Ravi holds a bachelor’s degree in science as well is a Chartered Accountant qualified from the Institute of Chartered Accountants of India, and Certified Information Systems Auditor from the Information Systems Audit and Control Association, USA.
Ravi has sound knowledge of US and India GAAP, and has worked in several verticals such as ITES, Real Estate, Pharma, Manufacturing, Consulting, Infrastructure, and Housing. He possesses acumen in leveraging his expertise in finance and accounting to the use of appropriate technology and implementing internal controls. He has worked on several ERP platforms such as NetSuite, Oracle, Peoplesoft, Business Central, and Sage and integrating ERP to several other external applications as per business needs.

Sari Quinlan
Director of Federal Tax Reduction
After joining O’Connor in 2012, Sari has built expertise across multiple divisions of the company. With a background in real estate, she onboarded as a property tax agent, but since 2017, Sari has specialized in the cost segregation process, providing federal tax relief to commercial property owners . As the leader of the Federal Tax Reduction team, Sari is also part of the Executive Committee, contributing knowledge as a subject matter expert to the leadership of the company.

John R. Fisher
LEED AP, Managing Director of Appraisal
John R. Fisher, LEED AP, is the managing director of the appraisal department, appraisal reviewer, an appraiser trainee supervisor. Mr. Fisher has more than 30 years of experience and has appraised or reviewed real estate valued in excess of one billion dollars during the course of his career. Mr. Fisher has been designated as an expert witness in both district court and federal court. He has completed all coursework and experience credit required for the MAI designation from the Appraisal Institute. John Fisher was the top producing appraiser for several years and is a two-time recipient of the STAR award given by O’Connor for superior achievement in technical expertise, quality of work, and professionalism.
Mr. Fisher holds a Bachelor of Business Administration with a major in Finance from the University of Houston; is a Leadership in Energy & Environmental Design – Accredited Professional (LEED AP); and is a State Certified General Real Estate Appraiser (Texas) TX-1323960-G. John is married with one child who is the center of his universe.

Tonya Felix
General Counsel
Since 2008, Tonya Felix has served as O’Connor’s General Counsel and is a member of the Senior Leadership Team. Mrs. Felix is the company’s chief legal advisor and has oversight of the Legal Department. She is a seasoned corporate attorney with extensive leadership experience. Mrs. Felix provides strategic counsel to management and executives on a wide range of issues, including regulatory compliance, litigation management, contract negotiation, policy development and employment matters. She has organized and developed key initiatives throughout the Legal Department that have had a significant business impact.
Mrs. Felix holds a Bachelor of Science degree from the University of Houston and a Juris Doctor from South Texas College of Law. In addition, Mrs. Felix is a member of the State Bar of Texas and is licensed in the U.S. District Court for the Southern District of Texas and the U.S. Court of Appeals for the 5th Circuit.

Evelyn Lozano
Director of Information Systems
Evelyn Lozano joined the O’Connor team in 1993 and has held various positions throughout her tenure such as Network Administrator, Manager of IT and most recently, Director of Information Systems. As Director, Evelyn’s responsibilities include management of programming, database and software management, and IT and Network infrastructure for all of O’Connor and its associated companies. Evelyn’s education background includes North Harris County College, SMU – Bellaire Technology Program; current certifications include CISSP, MCSE – Productivity, MCSA, CCNA Security, ITIL Foundation, CompTIA Security+.
A relentless advocate for taxpayers.
O'Connor's mission is to be the leading property tax advocate for taxpayers and to help drive reforms in the property tax appeal process.
Protect Taxpayers
We believe property owners deserve fair assessments and a strong advocate throughout the appeal process.
Data-Driven Strategy
We use research, market intelligence, valuation review, and appeal strategy to challenge overassessments.
Property Tax Reduction
Our proven solutions are built to help taxpayers pursue reductions in annual property tax assessments.
Industry Reform
We work to improve the property tax appeal process and bring meaningful advocacy to taxpayers nationwide.