Results, Relationships, Relief

We are your trusted partners in success – large enough to offer a full range of professional services, small enough to build the individual relationship you deserve, all at a fair price. With our seasoned expertise, we work with you to determine the best solutions for your unique needs to achieve the best possible results. Our firm is ready and capable to handle everything and offer relief so you can focus on what matters most to you.

Firm History

Lee, Mongelli & Associates services individual and business accounts, and has a recognized specialty in dental practices. The areas of practice include preparation of financial statements and reports, tax preparation and planning, consulting, and payroll processing, as well as assisting in dental practice purchase and sale transitions. The firm’s success has been based on the “team approach” to helping clients. The firm has always given prompt attention and performed quality work. Lee, Mongelli & Associates maintains a presence in the dental field by lecturing at the University of Colorado School of Dental Medicine annually to future dentists, as well as working closely with other professionals such as lawyers, brokers, and consultants who specialize in the dental field.

• Gary Mongelli, Partner
  Gary serves as the firm’s managing partner and is the director of the firm’s taxation and consulting department. Gary has over fifteen years of business management and more than fifteen years at public accounting firms. He has diversified experience with emphasis in strategic planning, financial consulting, tax planning and compliance. Gary has a Bachelor’s in Accounting from Metropolitan State University of Denver and a Master’s in Taxation from Denver University.
• Sarah Martin, CPS, Accounting Supervisor
  A keystone employee, Sarah has been an integral part of operations with the company since 2013. Sarah has a Bachelor’s in Accounting from Regis University and guides every aspect of our accounting services from payroll to tax preparation.
• Eric Sandage, Senior Staff Accountant
  Eric brings extensive client services experience along with his knowledge in accounting. He has been with the company since 2008, specializing in bookkeeping and tax preparation, and working to grow with the firm.
• Kani Kasirajan, CPA, ACA, Senior Tax Accountant
  Kani started with the firm in 2018, bringing more than 8 years of experience to assist clients in financial statement preparation and tax consulting. She holds a Master’s in Commerce and an Associate Chartered Accountant certification from India. Kani is also recertified as a CPA under GAAP.
• Jordan Smith, Tax Accountant
  Jordan has a varied background in client services and accounting. He graduated from Metropolitan State University of Denver with a bachelor’s in accounting and plans to pursue his CPA certification. Jordan has been with the firm since early 2020 and focuses on individual and business tax preparation as well as payroll and sales tax.
• Yelena Giganova, EA, Staff Accountant
  Lena has over ten years of experience as a CPA under IFRS and is working towards recertification as a CPA under GAAP. She joined the team in 2021 and brings more than 20 years of experience with her. Lena is currently an Enrolled Agent and holds numerous international certifications in accounting.
• Veronika Giganova, EA, Staff Accountant
  Veronika currently holds a Master’s in Information Science and Computer Engineering and is working toward receiving her Master’s in Taxation. She joined the team in 2021 helping with office administration, payroll, and tax preparation. She is actively pursuing her Enrolled Agent certification.
• Zelinda Singh, Staff Accountant
  Zelinda joined the firm in 2021. She has a bachelor’s in business administration with a focus in Economics from Colorado State University – Pueblo. She brings 4 years of experience in bookkeeping, payroll, and sales tax along with 3 years of business tax return experience.
• TJ Jad, Staff Accountant
  TJ received his Bachelors in Accounting with a minor in Economics from CU Denver. He’s been a part of the team since 2023 and brings more than 7 years of experience from tax preparation, accounting, and banking services.
• Shannon Richey, Marketing/New Client Coordinator
  Shannon has an entrepreneurial background and successfully ran her own business for several years. She joined the team in 2016 to help develop new business and assist with new client transitions.
• Alexis Steinbar, Administrative Assistant
  Alexis has an Associates degree in General Studies from Colorado Northwestern. She joined the team in 2021 and helps with client communications, billing, and administrative support.