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Meet Our Team



Natalya Korobkova-Itu, CPA

 Visionary CEO 

Natalya Korobkova-Itu is a seasoned Certified Public Accountant (CPA) with over fifteen years of licensure in Colorado and nearly two decades of experience in the accounting field. As an entrepreneur at heart, Natalya has dedicated her career to not only mastering the intricacies of tax and accounting but also to sharing her knowledge and best practices with fellow business owners.


Through her business, Colorado Business CPA, Natalya offers comprehensive services that go beyond traditional accounting. She provides specialized business packages that include tax preparation, accounting services, and personalized coaching support. Her goal is to help entrepreneurs navigate the complexities of business finance, ensuring they have the tools and knowledge needed to succeed.


Natalya’s approach is both friendly and professional, reflecting her commitment to building lasting relationships with her clients. She strives to uplift, inspire, and guide them on their entrepreneurial journeys, making her an invaluable resource for business owners seeking expert financial guidance and support.


Ryan Hill, EA

 Chief Operating Officer 

Ryan Hill is an Enrolled Agent with extensive experience in the intricacies of tax preparation and tax advisory services for business owners. Starting his career in accounting with a specialized focus on taxation, Ryan is now dedicated to becoming a leading advisor, guiding clients in implementing effective tax-saving strategies.


Ryan initially joined the Colorado Business CPA team in 2018 and returned in 2022, bringing with him a wealth of experience. Originally from the Mississippi gulf coast, he pursued his education at Mississippi Gulf Coast Community College (MGCCC) and the University of Southern Mississippi. Ryan’s professional career began in the casino gaming industry, where he spent over 20 years honing his skills in customer service, analytics, and management. This extensive background has equipped him with the skills necessary to provide exceptional customer service to his clients at Colorado Business CPA.


In addition to his professional commitments, Ryan is an avid outdoor enthusiast who enjoys hiking, fishing, and snowboarding.

Tax Advisory

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Mark Fesler, CPA

 Tax Manager 

Mark has been providing tax and accounting services to clients and businesses since 1983. He has experience as a CPA for individuals and owners of privately held business entities in service areas of taxation, accounting, tax research, mergers, sales and bookkeeping. In addition, he has held corporate positions as CFO, tax director and controller.


Mark is a Certified Public Accountant (CPA) in Colorado. He is a member of the American Institute of Certified Public Accountants and the Colorado Society of Certified Public Accountants. He is passionate about spending time with his grandkids. Mark is an avid fan of the Nebraska Cornhuskers and enjoys traveling and hiking with his wife, Lisa.

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Yevgeniya Pyrsenkova, EA

 Tax Strategist 

Yevgeniya Pyrsenkova is an Enrolled Agent with extensive experience in tax representation, compliance, and the preparation of individual, corporate, and partnership tax returns. She is skilled in addressing and resolving a wide range of tax-related issues while maintaining the highest standards of client service.  She brings over 15 years of global experience in accounting and financial management. 

Yevgeniya holds three Master’s Degrees and was a CPA in the Czech Republic. Her diverse background has given her a deep understanding of global financial management and accounting principles. In her free time, she enjoys outdoor activities, skiing, tennis, and traveling. She has a passion for exploring the world.

Accounting & Bookkeeping


Tatiana Marino

 Senior Client Accounting Consultant 

Tatiana Marino is a dedicated accounting and bookkeeping professional with over six years of experience serving small businesses. Her expertise lies in optimizing financial operations, ensuring accurate record-keeping, and providing insightful financial analysis to help businesses thrive. She also has two years of specialized experience in tax preparation and tax strategies.


Tatiana is furthering her qualifications by working towards obtaining her Enrolled Agent (EA) license. Her comprehensive skill set and dedication make her a trusted advisor to small businesses seeking reliable financial and tax solutions.


Darlajean Tafoya

 Senior Client Accounting Consultant 

Darlajean Tafoya is a seasoned Senior Accountant with over 25 years of experience in financial statement compilation and analysis. Holding a Business Degree, Darlajean has consistently demonstrated expertise in managing complex financial data, ensuring accuracy, and providing insightful financial guidance. Her dedication to her profession is matched by her commitment to continuous learning and improvement.

Outside of work, Darlajean enjoys gardening, reading, and spending quality time with her family. Known for her professionalism and meticulous attention to detail, Darlajean is a valuable asset.


Cassandra Nothdurft

Senior Client Accounting Consultant 

With a dynamic blend of professional skills honed over 3 years in accounting and a robust background in retail, Cassandra specializes in sales tax and navigating the complexities of financial management. Beyond the numbers, Cassandra is a certified expert in both QuickBooks Online and Desktop, and holds an Avalara MRA certification, showcasing her dedication to mastering the tools of the trade.


Cassandra's background in retail is invaluable. It has instilled a keen understanding of the commercial sector, enabling her to offer a comprehensive approach to financial solutions.



Lana Laicovsky

 Client Accounting Consultant 

Lana Laicovsky is a competitive and committed Client Accounting Consultant at Colorado Business CPA. She believes that being reliable and trustworthy brings out the best in you and the company. Her commitment to preparing financial reports, passion for financial analysis, and meticulous attention to detail help businesses achieve their financial goals. 


Lana earned a Master’s degree in Business Administration and Commerce in Ukraine. She also obtained a couple of certifications in accounting and tax, including QBO ProAdvisor. Her multilingual skills ( English, Ukrainian and Russian) significantly enhance the company’s effectiveness.


Sayra Arreola

 Client Accounting Consultant 

Sayra has over 13 years of experience in the accounting industry. She has a strong passion for learning analytical, communication, and accounting skills that help build strong relationships and ensure the success of her clients. Sayra is certified as a QuickBooks ProAdvisor, demonstrating amazing proficiency.


Sayra has worked with a diverse range of clients, from small businesses to large corporations, assisting them in acheiving financial control and awareness. She believes that integrity, transparency, and accountability are the cornerstones of effective financial management. 

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Julia Martin

 Administrative Assistant 

Julia Martin is a proficient administrative professional adept in office management, data organization, and multitasking. She is committed to ensuring seamless operations by delivering outstanding administrative support. Detail-oriented and skilled in problem-solving, Julia thrives in fostering positive work environments.


Since relocating to Colorado with her partner and their dog in 2021, she has embraced the adventure of exploring and falling in love with the scenic beauty of the state. Outside of work, she finds joy in hiking, camping, and cherishing moments with her loved ones.

Our Core Values


We inspire ourselves and others to achieve greatness and positively impact everyone around us.


Prioritize the needs and satisfaction of customers, continuously striving to exceed their expectations through exceptional service and innovative solutions.


We are intentional about living our lives in alignment with our core values and goals.


We encourage open and honest communication with everyone around us.

Results Oriented

We focus on the outcomes rather than the process to move our organization and our lives forward.


We are engaged, involved and focused on delivering superior service.

Growth Oriented

We constantly grow personally, professionally and financially.


Respecting the privacy and confidentiality of client information and ensuring it is protected at all times. 

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