THE PEOPLE BEHIND YOUR RESULTS
PRESIDENT AND FOUNDER
Ben Castro, CMI, MBA
Founder, American Bison Property Tax Services
- Institute for Professionals in Taxation (CMI)
- Speaker: COST & IPT Seminars
With nearly two decades of property tax experience, Ben Castro founded American Bison Tax with a clear mission: to provide pristine quality work in this specialised field, deliver impeccable client service and continuously challenge the status quo to reach new summits.
Before founding American Bison, Ben led the property tax division at a large public accounting firm. During his tenure, he grew the practice fivefold by consistently prioritising his clients and delivering tangible, measurable results across industries including leasing, manufacturing, retail and distribution.
Ben is a recognised voice in the property tax profession. He has spoken at seminars organised by the Council on State Taxation (COST) and the Institute for Professionals in Taxation (IPT), sharing insights with industry peers and shaping the conversation around property tax innovation.
LEADERSHIP TENURE
19+ Years in Property Tax Practice
TAX DIRECTOR
Maday Martinez
Director of Compliance & Audit
Advocacy
- 14+ Years Compliance Leadership
- Jurisdictional Audit Advocacy
Maday Martinez brings over 14 years of dedicated property tax compliance and audit advocacy experience to American Bison Tax. Her deep knowledge of jurisdictional requirements across multiple states ensures that every filing is accurate, complete, timely and fully defensible under scrutiny.
As Director of Compliance and Audit Advocacy, Maday oversees the full lifecycle of property tax compliance engagements, from initial data gathering and return preparation through to filing, audit response, dispute resolution and documentation management.
Her meticulous approach to process governance and documentation means that clients can rely on comprehensive, audit-ready support should any filing be questioned by a local jurisdiction. Under Maday’s leadership, nothing is left to chance and every detail is accounted for.
LEADERSHIP TENURE
14+ Years in Compliance and Defense
HOW OUR LEADERSHIP OPERATES
Principles That Guide Every Engagement
We Take On
Our leadership methodology is grounded in personal accountability, technical precision and a relentless commitment to delivering measurable value for every client.
Principal Level Involvement
Every engagement is led by a senior professional who is personally accountable for the quality and outcomes of the work. Our clients never wonder who is responsible for their account.
Nationwide Assessment Expertise
Our team manages property tax valuation analysis and compliance across all 50 states, applying local knowledge and national perspective to every assessment, filing and appeal we handle.
Audit Ready from Day One
We apply rigorous quality controls to every filing, ensuring that returns are accurate, properly documented and fully defensible from the moment they are submitted.
OUR BELIEF
Every Property Tax Challenge Deserves
a Specialist Who Cares.
Every jurisdiction is different. Our team combines deep local expertise with nationwide reach to deliver consistent, measurable results wherever your properties are located.
