About Us


Corporate Profile


Vantage One Tax Solutions is a national property tax practice achieving measurable results for our clients. Our sole focus is to help businesses navigate complex Ad Valorem tax issues. The Vantage One goal is to lower property tax expense.


Our team includes a wide range of skilled, experienced valuation professionals, from senior licensed in-house property tax professionals and appraisers to third-party American Society of Appraisers (ASA) appraisers, CPAs, real estate brokers and attorneys in the property tax industry.


Corporate Governance


Vantage One has adopted corporate governance as a guideline to assist the firm in the exercise of its responsibilities. These guidelines help to protect the clients we serve and the continued continuity of our business and the services we offer. Guidelines are reviewed annually by the Corporate Governance Committee and revised, as appropriate.


Management Style:


Vantage One’s Management Style stems from a top/down approach. We believe that our value system starts with management and flows down through everyone within the organization.


Value System:


Vantage One’s value system is designed to provide the highest level of integrity to our clients and to local governments. We understand that exercising integrity means having good ethical relationships on both sides of the valuation objective; serving our client’s interest and negotiating with local government towards an agreed upon valuation. The value system in place ensures our compliance with laws and regulations in each state in which we practice. And open communication and transparency with clients and local government builds trust and respect for our consulting practice.


Value Focus:


Vantage One’s value focus is driven by a Code of Ethics and encompasses the following objectives:


  • Integrity and Ethical Values
  • Compliance with Laws and Regulations
  • Communications and Transparency


Control Environment:


Vantage One’s control environment ensures the success of our client relationships by utilizing an Operating System that monitors and assesses the ongoing quality of our work product.


Operating Systems:


The operating system is designed to focus on performance in key areas with a forward look towards planning and budgeting to ensure continued successful performance:


Assessment of Compliance Integrity


  • State by state compliance
  • State Laws & Regulations


Planning and Budgeting for:


  • Quality of Performance
  • Success of Managing Deadlines & Commitments


Accountability of Internal Control and Confidentiality:


Our accountability stems from monitoring and assessing our Internal Controls. Our internal controls are a system that exists to facilitate the flow of accurate information for local government entities and the clients we serve. Through process flow identification, routine audits of the tax process, data validation, and system backup and redundancy we are able to provide the continuity and accountability of the information. This system also ensures the sensitive financial information that has been entrusted to us stays confidential and protected.


Social Responsibility


Vantage One is a socially responsible Company that pursues policies that are in the best interest of and benefit to our clients and community.


College Savings Fund


At Vantage One, we believe that education is the catalyst to great achievement. By aligning ourselves with our clients towards this common goal, we will be able to meet the challenge of the future and the changing needs of our economy.


  • Irrevocable Gift awarded annually and invested into an account that will be used for future college expenses.
  • Educating our youth and the opportunity to give back to the community through our clients by helping a child achieve his or her goals.


Executive Team:


John Michael Grizzaffi – M&E Appraiser-Tax Consultant


J. Michael Grizzaffi is a licensed property tax consultant and graduate of Texas Tech University with a BS Electrical Engineering Degree and a minor in Mathematics. He spent 30 years as an Engineer with Texas Instruments, Inc. While at TI his work included design of Infrared Imaging Systems and Computer Systems, including work on several classified military projects. One of his more notable accomplishments was designing the Digital Data Subsystem for the Voyager Satellite still in orbit at edge of our solar system. He received an MBA Degree from the University of Dallas and an MS Management and Administrative Science Degree from the University of Texas at Dallas. He is a registered Professional Engineer (Emeritus), and an American Society of Appraisers Accredited Senior Appraiser designated in Machinery and Equipment. He has developed and implemented a method and process for running statistical analysis on Commercial Real Estate Property for Protest support and Appeals. He also developed a process for the creation of depreciation factors for Business Personal Property through statistical analysis of sales on like assets and inventory in the marketplace that can be benchmarked against other forms of standard depreciation. As a consultant in property tax he has worked valuations on Commercial Real Property and Business Personal Property informally at the District level, as well as representation before the Appraisal Review Board.


Rhonda Stevens – Senior Tax Consultant


Rhonda Stevens is a senior tax consultant specializing in Commercial Real Property and Business Personal Property tax reductions. Ms. Stevens possess over 15 years of Real Estate and Tax law experience. She began her career in law in Texas and migrated towards real property and business personal property tax analysis and representation. Ms. Stevens currently manages a portfolio of commercial real property that exceeds $250 million in assessed value. She specializes in complex property analysis of Industrial Manufacturing and Technology assets. More notable is her work with the cities at the local level to secure 380 incentives for business personal property and other enterprise zoning based initiatives towards savings millions of tax dollars. She thoroughly understands the intricacies of statistical analysis and regression modeling to develop valuation strategies for assets and inventory. Her work in the business personal property arena includes a national portfolio of $500M in assessed value.


Rhonda graduated Magna Cum Laude from the University of Texas at Dallas with a Bachelors of Science Degree in Accounting and Information Management, and maintains an active membership in Beta Gamma Sigma International Honors Society for Business. She also holds a Master of Science Degree with Honorary Distinction in Accounting from the University of Texas at Dallas.


Philip Trusty – Senior Tax Consultant


J. Philip Trusty is a licensed senior tax consultant having over 25 years experience in the property tax field. Mr. Trusty holds a Bachelor Business Administration in Finance from Texas Tech University. In addition, he holds a Texas Real Estate Brokers License and is working toward his CMI designation through the Institute for Professionals in Taxation. His career began with Dallas Central Appraisal District holding positions in various appraisal areas including supervisor in the Business Personal Property Department and assistant to the Director of Administration. After Dallas Central Appraisal District, Mr. Trusty began work as a property tax consultant. His consulting experience includes nationwide business personal property filings and appeals for both business personal and real property. His experience with business personal property includes managing national client portfolios in excess of $500M. Mr. Trusty has worked with multi location/multi state businesses, large and small manufacturing firms, warehouses, offices of all sizes and a wide variety of other businesses. His commercial real estate experience includes a wide range of commercial, retail, agricultural and residential real estate.