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Martin Ruben

Charlottetown, PEI

Martin Ruben, FCPA, FCGA spent 30 years as a director with the Office of the Auditor General of Canada and 8 years as a director with the Office of the Auditor General of the Cayman Islands before starting his consulting career in 2017.  He is a Chartered Professional Accountant who was conferred the Fellow designation in 2013 for service to his profession. 

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David Rykken

Washington, DC

David Rykken has more than 20 years of experience in public service working with all levels of government. He has worked for HHS at headquarters in DC for the last 12 years as a Supervisory Management Analyst, a Senior Emergency Management Specialist and a Supervisory Public Health Advisor.  Previously, he served as the Chief of the Ancillary Services in the Republic of Palau.

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Beth Schubert

Lakewood, CO

Beth Schubert is the Office of Inspector General’s program coordinator for its Insular Areas Capacity Building Program. Ms. Schubert is responsible for all OIG training and technical assistance in the insular islands.

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Josephine Villanueva, CPA, CGMA, CGFM, CSAF, SHRM-CP, PMP


Josephine “Josie” Guico Villanueva is a hands-on finance officer known for a deliberate and focused approach with 20 years of diverse work experience in all facets of accounting, human resources, and administrative functions. Her work experience has evolved from private, non-profit, federal, and local government sectors. She is currently the Director of Finance and Administration for the Guam Visitors Bureau. Josie is a former Treasurer of the Association of Government Accountants Guam Chapter.

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Mizpah Wiegand, CPA


Mizpah Wiegand is an audit senior manager at Deloitte & Touche LLP, specializing in the performance of audits of federal awards in compliance with the Single Audit Act. Mizpah began her career with Deloitte in 1991. With nearly 30 years of experience performing Single Audit engagements, she leads the Single Audit compliance and education efforts for the Audit and Assurance practice. She is instrumental in the development and delivery of Single Audit compliance training.

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Jeanne Yamamura, CPA, Ph.D.

Reno, NV

Dr. Yamamura brings to more than thirty years of experience in industry and academia to the PITI-VITI training team. She is licensed as a CPA in California and Nevada, and teaches a variety of custom-built courses to Pacific and Virgin Islands professionals.

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