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Trusted Accounting & Tax Services in Tucson, AZ
Regier Carr & Monroe has dedicated over seven decades to delivering comprehensive accounting and business consulting services. Our approach uniquely combines personalized attention with the robust resources of a large firm, ensuring clients receive tailored solutions aligned with their long-term objectives. We prioritize building enduring relationships by offering proactive advice on both business and personal financial matters, ensuring clients feel valued and supported year-round. Our team of certified professionals specializes in audit services, tax planning, forensic accounting, and management consulting, serving individuals, corporations, nonprofits, and trusts.

As members of the American Institute of Certified Public Accountants, we uphold the highest standards of expertise and integrity. Clients consistently highlight our responsiveness, deep industry knowledge, and commitment to minimizing tax burdens while maximizing operational efficiency. With offices in Tucson, Wichita, and Tulsa, we provide localized service backed by national-level resources. Our focus extends beyond transactions to fostering partnerships that drive sustainable growth and financial success for our clients.
Services
Audit Services Tax Planning Bookkeeping Forensic Accounting Business Consulting
Highlights and features
  • We offer personalized service combining big firm resources with individual attention
  • Our team provides proactive advice on business and personal financial issues
  • We specialize in audit services, tax planning, and forensic accounting for diverse clients
  • Our 70+ years of experience ensure deep industry knowledge and reliable solutions
  • Clients value our responsiveness and ability to minimize tax burdens strategically
Associations and certifications
  • American Institute of Certified Public Accountants
What people say
Depth of expertise Personalized service Proactive financial advice Responsive support Long-term reliability
Services
Audit Services
Our audit services provide independent assessments of financial statements, ensuring compliance with regulatory standards. We deliver actionable insights to improve operational efficiency and risk management for businesses and nonprofits.
Tax Planning
We develop customized tax strategies to minimize liabilities while maximizing savings. Our experts stay current with evolving regulations to ensure compliance and optimize financial outcomes for individuals and businesses.
Bookkeeping
Comprehensive bookkeeping services maintain accurate financial records, including payroll, accounts payable/receivable, and financial reporting. We ensure timely, error-free documentation to support informed business decisions.
Forensic Accounting
Our forensic accounting services investigate financial discrepancies, fraud, and litigation support needs. We combine accounting expertise with investigative skills to resolve complex financial disputes and legal matters.
Business Consulting
We offer strategic business consulting to enhance growth, profitability, and operational efficiency. Services include financial analysis, risk assessment, and tailored recommendations aligned with long-term organizational goals.
People
Nicole Teree Harrigan
Partner, CPA
Nicole Harrigan specializes in tax and accounting services for businesses and individuals. With extensive experience in financial planning, she delivers strategic solutions to optimize client outcomes.
Susan M. Vos
Partner-In-Charge, CPA/CFE
Susan Vos leads audit and forensic accounting engagements, focusing on fraud detection and prevention. Her expertise ensures clients receive thorough, ethical financial investigations and compliance guidance.
Terri M. Gilligan
Tax Partner, CPA
Terri Gilligan provides tax compliance and planning services for corporations and individuals. She emphasizes proactive strategies to reduce liabilities while maintaining regulatory adherence.
Jamie A. Villasenor
Partner, CPA
Jamie Villasenor specializes in audit and consulting services for nonprofit organizations. He focuses on improving financial transparency and operational efficiency for mission-driven clients.
Nicole Sullivan
Tax Partner, CPA
Nicole Sullivan offers tax planning expertise for high-net-worth individuals and businesses. Her client-centric approach ensures personalized strategies aligned with long-term financial goals.
Questions
What accounting services do you offer?
We provide audit services, tax planning, bookkeeping, forensic accounting, and business consulting for individuals, corporations, and nonprofits.
How are you different from other accounting firms?
We combine personalized attention with big firm resources, offering proactive advice tailored to clients' long-term financial goals and industry-specific needs.
Which areas do you serve?
We operate from offices in Tucson, AZ; Wichita, KS; and Tulsa, OK, serving clients nationwide with localized expertise.
What are your office hours?
Tucson and Tulsa offices: Monday-Thursday 8:00 AM–5:00 PM, Friday 8:00 AM–12:00 PM. Wichita office: Monday-Friday 8:00 AM–5:00 PM.
How long have you been in business?
We have provided accounting and consulting services for over 70 years, combining decades of experience with continuous adaptation to industry changes.
Reviews (2)
Tanya Warden
Mar 14, 2021 Report
They were great, first we got lost then we got there explained everything to them.they were honest and told us they could not help but recommend we get a loyer.we loved the fish tank on the first floor to.could have sat there for hours and read a book. Verry nice people.and building.
Scott F.
Nov 21, 2019 Report
These accountants do an excellent job and have great integrity. I have used them for over twenty years and can say enough good things about Mr. Sell and his staff.