Meet Our Team

Eric Kunkel

CPA/ABV/COMA, CVA, M&A

Founding Partner

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John Curzon

CPA/ABV/COMA, CVA, M&A

Founding Partner

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Aaron Spoon

CPA

Partner

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Jeffrey A. Frable

CPA, CGMA

Partner

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Kyna Leyva

CPA, CGMA

Partner

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Luann T. Rinowski

CPA

Partner

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Kaitlin Flinn

CPA

Partner

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Caleb Caldwell

CPA

Partner

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Sara Mays

CPA

Partner

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Dewan Chowdhury

Partner

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Jim Hicks

CFO-COO

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Victoria Guerre

SPHR

Director of Human Resources & Consultant

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Kristie Porter

Director of Business Growth & Development

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Eric is a Founding Partner of the CCK Firm. He is a Certified Public Accountant, Certified in Financial Forensics, Accredited in Business Valuation, and a Certified Valuation Analyst. He is a graduate of the University of Tulsa, with a Bachelor of Science degree and a Master’s degree in Business Administration. His major areas of practice include income tax planning and compliance; foreign and international tax matters; business valuation; multi-state tax matters; estate and gift tax planning; audit and financial accounting services; general business consultation; and benefit and retirement planning. In addition to other sectors, Eric’s practice at CCK involves companies in the manufacturing and distribution industries. As a result, his professional experience has grown to include foreign and international tax matters.

Eric is a member of the National Association of Certified Valuation Analysts; the American Institute of Certified Public Accountants; the Tulsa Chapter of the Oklahoma Society of Certified Public Accountants; and the Institute of Management Accountants. He has a long-term commitment to serving in professional organizations including serving as a past President of the Tulsa Chapter of the OSCPA; a past Director of the Board of the OSCPA; a past member of the OSCPA Business Valuation, Forensic and Litigation Support Committee; past Chairman of the OSCPA Taxation Committee; and a past Chairman of the OSCPA Tulsa Chapter Continuing Education Committee. Eric is a member of the Tulsa Estate Planning Forum and the Tulsa Tax Forum. Eric is also active through CCK Corporate Sponsorship in the Tulsa Chapter of the Oklahoma Ethics Consortium.

Eric feels a deep sense of responsibility and desire to give back to the community, and he is the Treasurer and member of the Board of the Community Food Bank of Eastern Oklahoma. As a native Tulsan who has traveled many times by bicycle through 15 countries, Eric holds a passion to see the state of Oklahoma reach its highest potential, which is why he was recently inducted into the Oklahoma District Export Council for a 4-year term. The U.S. Department of Commerce has selected his nomination as an individual for appointment by the Secretary of Commerce to serve as a member of the Oklahoma Council. In our country’s finest tradition of volunteerism, the approval of his membership is important to a national economic goal of expanding the U.S. exports. Eric is also active through CCK Corporate Sponsorship in the Tulsa Global Alliance.

Eric holds tax and business consulting experience in connection with client business presence in the following jurisdictions: Canada, Mexico, Turks & Caicos, Columbia, Peru, Brazil, Australia, New Zealand, China, Hong Kong, Taiwan, Singapore, Saudi Arabia, South Africa, United Kingdom, Netherlands, Austria, Belgium, Trinidad, Switzerland, Qatar, Nigeria, Algeria, Uganda, and Madagascar. He is currently working with clients with tax filings and other compliance matters in 47 U.S. States. He is also a multi-term member of the Tulsa Board of Big Brothers Big Sisters of Oklahoma; a founding member of the Board and long-time Treasurer of the Tristesse Healing Hearts Grief Center; a member of the Tulsa Chapter and two-time former Superior District Governor of the American Business Club, as well as a two-time Tulsa Chapter President.

Tulsa Office
8811 S Yale Ave, Ste 400
Tulsa, OK 74137
(918) 491-4036
eric@cckcpa.com

John E. Curzon is a Founding Partner of CCK Strategies, PLLC. He is a Certified Public Accountant accredited in Business Valuation and is a Certified Merger & Acquisition Advisor. Curzon holds a Bachelor of Science degree in accounting and business administration from the University of Kansas and is a member of various professional organizations.

Primary practice areas have included merger and acquisition consulting; business valuation; buy-side and sell-side due diligence; business transition and succession planning; strategic business structure planning; international and domestic income tax consultation; and operational strategies for entrepreneurs.

He is a member and past Chair of the Oklahoma Governors’ International Team. Curzon was appointed by Governor J. Kevin Stitt to serve as a Board member of the Oklahoma Accountancy Board in July 2023. Curzon is also a member of IR Global, an international network of professional service firms, and a past member of the Accountancy Committee. He is a member and past Chair of the Oklahoma Society of CPA’s Professional Ethics Committee. Curzon is past Chair of the OSCPA Editorial Board of CPA Focus Professional Magazine and is a contributing author. He is a member of the Board of Directors for Junior Achievement of Oklahoma and Past Chair and Founding Director of the Board of Sangha, an organization providing sober living housing to individuals in recovery. Curzon is a Founding Director of The Light to the Nations, Ltd., an organization providing humanitarian relief.

Tulsa Office
8811 S Yale Ave, Ste 400
Tulsa, OK 74137
(918) 491-4036
john@cckcpa.com

Aaron Spoon is a partner at CCK Strategies, bringing nearly 20 years of experience providing strategic advisory services that empower businesses to thrive across diverse markets. Specializing in strategic tax consulting and succession strategies, he drives results for entrepreneurs navigating today’s fast-paced, evolving landscape, serving clients with national and global reach.

He leads the firm’s strategic growth practice, helping clients tackle complex challenges, seize opportunities, and achieve long-term success. In this role, Aaron cultivates a growth-focused culture at CCK Strategies, mentoring teams, implementing innovative solutions, and positioning the firm to deliver forward-thinking advisory services that anticipate client needs and market trends.

Aaron approaches every client engagement with integrity, clarity, and authenticity. By understanding each client’s unique challenges, he crafts strategies that move businesses forward. Through collaborative, trusted relationships, Aaron empowers leaders to make bold decisions, navigate complexity, and achieve results that go beyond numbers, fostering growth, confidence, and lasting impact.

Jeff is a Partner at CCK Strategies and a Certified Public Accountant with more than 25 years of leadership at the firm. Since joining CCK in 1999, he has helped guide its expansion from a seven-person office to a team of more than 135 professionals across two locations. His area of focus includes strategic planning, income tax consultation, audit, and financial accounting services.

Recognized for his technical expertise and people-centric approach, Jeff develops proactive tax strategies and long-term planning solutions that drive business success. He also shares insights as co-host of 2 CPAs and the Mic, a podcast blending straight talk, humor and practical advice on today’s tax and business issues.

Beyond his client work, Jeff invests his time and leadership in the community. He has served organizations including the ORU Golden Eagle Club, Zephyrus Arts Institute, and the Tulsa Route 66 Marathon. Most recently, he was named 2025 Chairman of the Bixby Metro Chamber Board of Directors and Treasurer for Rob Miller’s state superintendent campaign. In 2013, Jeff was honored as the 54th inductee into the Oklahoma Accounting Hall of Fame.

Grounded by his faith and family, Jeff finds his greatest joy in life with his wife of 33 years, Sherry, their three adult children, and a growing collection of “grand pets.”

With more than 24 years of experience in tax and business consulting, Kyna Leyva, CPA, is a trusted partner at CCK Strategies. She is committed to helping clients achieve their goals through proactive, strategic solutions that go beyond compliance to drive meaningful results.

Kyna’s leadership and contributions to the profession have been widely recognized, including her designation as an Oklahoma Society of CPAs Trailblazer. She is an active member of both the AICPA and the Oklahoma Society of CPAs, where she has served in key roles such as treasurer and scholarship committee chair for the Tulsa Chapter. In addition, she serves on the board of directors at Lindsey House, an organization that empowers women and their children as they transition out of situational homelessness.

Known for her collaborative style and unwavering dedication to client success, Kyna fosters lasting partnerships by ensuring every client feels supported, informed, and empowered to achieve their business objectives.

At the heart of her life is her family, whose love grounds and inspires the purpose she brings to her work.

Luann Rinowski brings more than 25 years of experience in public accounting as a partner at CCK Strategies. She specializes in strategic tax planning and compliance services, collaborating with business leaders across various industries providing insightful guidance that empowers informed financial decisions.

Her accomplishments include earning a master’s degree, achieving her CPA designation, and a partnership at a prominent CPA firm with a global presence. Luann is highly skilled in IRS audit representation and problem resolution.

Renowned for her talent in transforming complex technical knowledge into relatable solutions, Luann is dedicated to fostering lasting client relationships and aligning solutions with their business objectives for long-term success. Beyond her professional commitments, she is passionate about mentoring students and young adults, helping them enhance their financial literacy and gain the confidence needed to forge their own paths.

Kaitlin Flinn is a Partner at CCK Strategies, where she empowers entrepreneurs with strategic insights that fuel growth and long-term success. She brings deep expertise in entity formation and structure, strategic tax planning, cross-border consulting, transfer pricing, R&D incentives, and multi-state compliance, providing tailored solutions to help businesses thrive in today’s evolving marketplace.

A Tulsa native, Kaitlin earned her Bachelor of Accounting from Oral Roberts University and a Master of Taxation from the University of Tulsa. Her leadership extends beyond the firm as executive board chair of the Tulsa Global Alliance, where she advocates for cultural exchange and international business cooperation. She has also been honored with the Oklahoma Society of CPAs Trailblazer Award, recognizing her impact and leadership in the profession.

Sara Mays is a Partner at CCK Strategies with over two decades of experience in public accounting and strategic tax advisory. She is recognized for her expertise in tax planning, regulatory compliance, and business consulting, bringing a client-focused mindset and actionable insights to guide businesses through complex financial decisions.

Sara began her career as a staff accountant, building a strong foundation in tax preparation and financial reporting. She joined CCK early in her professional journey and advanced through leadership roles, serving as Tax Manager for over 17 years and then Managing Director before stepping into her current role as Partner in 2025.

Known for collaborative leadership and a focus on strategic growth, Sara develops tax solutions that support long-term business objectives, mitigate risk, and enhance financial performance. Her career reflects resilience and dedication, balancing professional achievements with family life while earning a reputation as a trusted advisor to her clients.

Caleb Caldwell, Partner at CCK Strategies, specializes in helping business owners, professional athletes, and entertainers identify growth opportunities and overcome challenges. Known for his tenacity and problem-solving mindset, he empowers clients to focus on what drives their success.

A proud graduate of Northeastern State University, Caleb began his career at CCK Strategies while completing his accounting degree. His drive, commitment to excellence, and collaborative approach have fueled his professional growth and helped him build strong, lasting partnerships that empower business leaders to achieve their goals. Beyond his work at CCK, Caleb is deeply committed to community engagement, serving on the YMCA Board of Directors and actively participating in the Frisco Chamber of Commerce to support local entrepreneurship and strengthen social well-being.

Caleb’s impact extends internationally, collaborating with clients in South Africa, Australia, and the United Kingdom. Clients value Caleb’s approach as hands-on, solutions-driven teamwork that advances their business objectives. His strategic insights enable entrepreneurs, athletes, and performers to break barriers and achieve their dreams.

As a Partner at CCK Strategies, Dewan Chowdhury combines nearly 15 years of public accounting experience with a genuine commitment to helping business owners and families plan strategically for a lifetime of financial success. A trusted advisor in tax and estate planning, Dewan offers clarity, foresight, and a long-term perspective to his client relationships.

Dewan’s expertise includes developing purpose-built tax strategies and optimal entity structures for business owners, investors, and independent contractors, with specialized focus in the real estate industry. He also provides extensive guidance in federal and state tax planning, compliance, and skillfully resolving complex IRS and state matters for both individuals and businesses.

Dewan holds a Bachelor of Business Administration in Accounting from Southern Methodist University and a Master of Science in Accounting from the University of Texas at Dallas. Beyond his professional life, Dewan enjoys traveling with his wife and exploring new cultures around the world with their family. He also spends time playing indoor badminton in the DFW area.

Jim Hicks serves as the CFO and COO at CCK Strategies, where he manages internal finance and all operational activities. With over 25 years of expertise in financial management, business leadership, and corporate strategy, Jim is a strategic leader committed to driving operational excellence and growth.

Since joining CCK Strategies in 2020, he has leveraged his extensive background in the oil and gas and manufacturing industries, where he previously held financial executive roles. Jim holds an MBA from the University of Tulsa and Bachelor of Science in Business Administration (B.S.B.A.) in accounting. Beyond his professional life, Jim is passionate about empowering students with financial literacy skills, helping to equip the next generation for success.

Jim and his wife Keri are proud parents to a teenage daughter. When they’re not managing the hustle and bustle of competitive cheer, they enjoy traveling and embarking on new adventures as a family.

Kevin Jeter brings over four decades of strategic human capital expertise to CCK Strategies, where he serves as HR Director and client consultant. With deep roots in both corporate and professional services environments, Kevin specializes in building organizational capability through strategic talent management and leadership development.

His career spans diverse industries including banking, investments, legal administration, and public accounting, giving him a nuanced understanding of how people strategies must adapt to different business contexts. Kevin excels at translating organizational challenges into actionable development strategies that enhance both individual performance and team effectiveness.

At CCK Strategies, Kevin partners with the internal team to elevate learning initiatives, strengthen HR infrastructure, and ensure that people strategies align with business objectives. His client-focused approach and breadth of experience enable him to deliver sustainable solutions that drive organizational growth and employee engagement.

Victoria Guerre brings over 20 years of strategic HR leadership to her role as Director of Human Resources & Consultant at CCK Strategies. Victoria is known for her ability to develop effective teams and to encourage a culture of integrity and collaboration. She plays an essential role in connecting talented individuals to meaningful opportunities across the organization.

Victoria’s diverse career spans several industries, including technology, professional services, and manufacturing. She has successfully led initiatives in talent acquisition, organizational development, and employee engagement. Victoria’s approach focuses on both people and results, ensuring that every team member feels valued while making meaningful contributions to the firm’s mission.

Victoria’s thoughtful counsel and grasp of workforce dynamics make her a trusted advocate for professional growth and excellence. Whether mentoring emerging leaders or shaping strategic HR frameworks, her impact is felt across every corner of the organization, driving significant improvements in workforce capabilities and development.

Kristie Porter is the Director of Business Growth and Development and a Gallup® Certified Strengths Coach at CCK Strategies, where she has built a 10+ year career driving growth, developing talent, and fostering meaningful client and colleague relationships. Known for her forward-moving attitude and genuine compassion, Kristie has earned a reputation for building trust and cultivating partnerships that deliver results.

With extensive experience across marketing, business development, and client relationship management in professional services and economic development, Kristie brings a broad industry perspective to her role. She leverages this expertise to help clients and colleagues reach their full potential, coaching internal teams, driving revenue, creating opportunities, and fostering professional growth through CliftonStrengths.

Kristie’s greatest joy comes from her family. She and her husband, Chuck, have been married for over 25 years and are proud parents of two daughters. Together, they enjoy serving in their church, spending time outdoors, and cheering for their girls on the lacrosse field.