Audrey M. Lance, CPA is a manager at Thomas, Head & Greisen, PC. Audrey has been with the firm since 2011. Her main emphasis is supervising staff within the Tax, Accounting and Auditing Departments.

Audrey has experience in supervising, planning and performing financial statement reviews and audits and single audits, financial statement preparation, accounting training, and tax services. She has worked in such industries as for-profit and non-profit organizations, including churches, museums, state fairs, educational facilities, and medical.

Audrey is a graduate of the University of Northern Colorado with a Bachelor of Science in Business - Accounting, Minor in French. She is a member of the American Institute of Certified Public Accountants (AICPA) and the Alaska Society of Certified Public Accountants (AKCPA). She is also the Treasurer for Standing Together against Rape (STAR) and Volunteers of America Alaska (VOAA).

Sofia Straub, CPA is a manager at Thomas, Head & Greisen, PC. She has been with the firm since 2019. Sofia's main work is tax focused, with experience in simple to complex individual, partnership, corporate and fiduciary returns. Her industries of interest include cannabis, real estate, and trust & estate. Aside from tax compliance services, she provides consulting services to individuals and businesses.

Sofia is a graduate of the University of Alaska with a Bachelor of Business Administration in Accounting and Management. She is a member of the American Institute of Certified Public Accountants (AICPA) the Alaska Society of Certified Public Accountants (AKCPA).

Tiffany Helkenn, CPA/CFF is a manager at Thomas, Head & Greisen, PC. She has been with the firm since 2020. While Tiffany performs tax services, her main expertise is focused in the firms Audit & Attest Department. She has experience supervising, planning and performing audits, reviews, single-audits and special-purpose financial statements. These projects range from simple to complex and focus on non-profit organizations, as well as for-profit.

In addition to financial statements, Tiffany specializes in forensic accounting, holding the Certified in Financial Forensics credential. She has been engaged as both a consulting expert and a testifying expert, providing services in litigation support, accounting disputes, contract disputes and other situations requiring forensic expertise.

Tiffany is a graduate of the University of Alaska with a Bachelor of Business Administration in Finance. She is a member of the American Institute of Certified Public Accounts (AICPA) and the Alaska Society of Certified Public Accountants (AKCPA).

Sunita Pandey, CPA is a manager at Thomas, Head & Greisen, PC. She joined the firm in January 2026 with 10 years of experience and focuses her practice on partnerships and high‑net‑worth individuals, with specialization in investment partnerships, private equity, and venture capital. She brings deep expertise in complex tax compliance and consulting, combining technical excellence with a client‑focused approach to help clients navigate today’s evolving tax landscape.

Sunita earned her undergraduate degree in Business Administration from Nepal and holds a Master’s in Taxation from Robert Morris University in Pennsylvania. She is a certified public accountant licensed to practice in Washington and a member of the American Institute of Certified Public Accountants (AICPA).