Welcome to GZEA financial services and consultants
Our global leadership team oversees GZEA’s services, supported by senior advisors and an international network of collaborators delivering specialized expertise across regions and sectors.
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Mr. Yohannes Araya, CPA, is a former U.S. Government Senior Foreign Service Officer with over 23 years of experience in federal financial management, development, and humanitarian assistance. He began his federal career as a performance auditor with the USAID Office of Inspector General, strengthening accountability and oversight across diverse programs. He later served as a USAID Financial Controller and in senior leadership roles guiding financial management, program oversight, and organizational effectiveness worldwide. Before entering federal service, Mr. Araya spent more than eight years with Big Six and regional accounting firms as an Audit Manager, overseeing audits of nonprofit organizations, small and medium-sized entities, state and local governments, and trade associations. He is a licensed CPA in Maryland, Virginia, and the District of Columbia and holds a B.S. in Computer Science from Northeastern Illinois University and an MBA in MIS and Accounting from the University of California, Davis.
Mr. Chung Huang has over a decade of experience leading accounting and payment operations for international development programs, supervising multi-country teams and managing high-volume financial transactions in complex operating environments.
Across multiple overseas assignments, he ensured accounting, recordkeeping, and disbursements were accurate, timely, and compliant with federal requirements, organizational policies, and contractual obligations. He managed regional service models supporting multiple country platforms and U.S. government partners, and in Afghanistan oversaw approximately $5 billion in accounting transactions and certified roughly $2.5 billion in disbursements.
Chung also brings strong command of integrated financial management tools—core accounting and payment platforms, payment workflow systems, time and attendance, and procurement systems—and is skilled in troubleshooting process and system issues to deliver practical, compliant solutions.
Mr. Huang has a bachelors degree in computer science and an MBA from the University of Missouri.
With deep expertise in accounting operations and financial recordkeeping, Chung leads accounting, payments, and broader financial management functions with accuracy, transparency, and efficiency.
Mr. Sampson is an accomplished, results-driven procurement and contracting leader with extensive experience delivering large, complex acquisitions from start to finish. He has successfully led acquisition planning, market research, solicitation development, competitive evaluations, negotiations, awards, and contract/grant administration for portfolios exceeding USD 1 billion—ensuring strong governance, transparency, and best-value outcomes.
He is recognized for building efficient procurement systems, strengthening internal controls, and managing high-risk, high-visibility awards with multiple stakeholders. Mr. Sampson brings deep expertise across diverse sectors, including construction, telecommunications, and consumer products.
At GZEA, he will help organizations implementing grants and contracts with international organizations, foundations, and U.S. Government agencies by strengthening procurement processes, improving compliance, and supporting effective post-award contract and grant management.
Mr. Thomas Solomon is an economist and Senior Public Financial Management (PFM) Advisor with extensive experience supporting PFM reforms, domestic resource mobilization, transparency, and governance initiatives across Africa, Asia, Europe, Latin America, and the Caribbean. He served with the U.S. Agency for International Development (USAID) from 2011 to 2025, advising headquarters and field missions on PFM policy and providing technical guidance on program design and monitoring and evaluation to strengthen partner-country systems and public accountability.
Earlier, he served with the U.S. Treasury Department’s Office of Technical Assistance (OTA) and then with the Government of the District of Columbia as Manager of the Electronic Banking and Cash Forecasting Unit. He also brings over 16 years of private-sector corporate finance experience, including as Director of Treasury Operations at Washington Gas Light Company. He holds Master’s and Bachelor’s degrees in Economics from the University of Oslo and served on the PEFA Advisory Board and the OECD-MAPS Steering Committee.
Mr. Sampson is an accomplished, results-driven procurement and contracting leader with extensive experience delivering large, complex acquisitions from start to finish. He has successfully led acquisition planning, market research, solicitation development, competitive evaluations, negotiations, awards, and contract/grant administration for portfolios exceeding USD 1 billion—ensuring strong governance, transparency, and best-value outcomes.
He is recognized for building efficient procurement systems, strengthening internal controls, and managing high-risk, high-visibility awards with multiple stakeholders. Mr. Sampson brings deep expertise across diverse sectors, including construction, telecommunications, and consumer products.
At GZEA, he will help organizations implementing grants and contracts with international organizations, foundations, and U.S. Government agencies by strengthening procurement processes, improving compliance, and supporting effective post-award contract and grant management.