Our Business is Assessment

Providing strategic and technical expertise for the assessment and edtech sectors.

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We bring expertise that helps our clients make decisions with confidence.

Assessment Expertise

Our team blends measurement and research principles with extensive, hands-on experience in the design, development, analysis, and reporting of large-scale assessment programs to guide our clients on their assessment journey.

Business Guidance

We lead partnership and procurement activities, provide insights that help our clients refine their strategic direction, define sectors and geographies, and monitor competitor and market changes. Through an analytical approach we help organizations make decisions and implement changes that support their preferred route towards long-term sustainability.

Technical Solutions

Performance and growth in assessment technology requires dependable, scalable solutions. We inform technical decisions centered around actionable initiatives, analyzing build/buy decisions and creating the technology solution roadmap to support the adoption of an organization's innovative products and services.


Offering expertise to testing agencies, solution providers, and sector investors.

Service Providers

We apply an understanding of market trends, government policies, and customer needs to quantify the size, type, and urgency of sector opportunities. We then analyze and advise on effective strategies and solutions to achieve your desired results.

Testing Agencies

Bringing deep knowledge of the industry, we are your external resource when you need to establish or refresh the components of your testing program. From writing RFPs to selecting vendors to implementing technology, we are dedicated to ensuring your success.


You can count on us to provide market intelligence and insider information regarding the capabilities, reputation, and potential of industry players. Our insights on the key success factors add value to your investment decisions.

What We Do

Gibbs Advisors is a bespoke consulting firm delivering advice and solutions across the spectrum of assessment-related challenges. Our team brings hands-on expertise, significant industry successes, and the ability to understand key issues from multiple perspectives. As assessment geeks, we are always delighted to remove the stress from your testing challenges and solve your trickiest problems.

Meet the Team

Whatever the problem, we can help.

Stella Gibbs

Stella Gibbs / Principal Consultant

Stella is the founder and Principal Consultant at Gibbs Advisors, LLC, where she focuses on market and business development challenges faced by organizations as they deliver innovative assessment, data, and learning solutions in education, career and industry settings.

Before establishing Gibbs Advisors, LLC, Stella was the Executive VP at Pacific Metrics Corporation, a California-based assessment and technology company. As one of the founding executives, she was integral in securing its portfolio of business, scaling the organization and implementing its vision to provide innovative and practical measurement and technology solutions to modern assessment and learning needs.

Stella holds an MBA from Southern New Hampshire University, a Masters in Occupational Education (MOE) from the University of New Hampshire, and a B. Ed. (Hons.) from the University of Exeter in England. She brings over 25 years of deep industry experience with a number of national and international assessment and technology organizations.

Dr. Stuart Kahl

Dr. Stuart Kahl / Lead Consultant

Dr. Stuart Kahl is the Lead Consultant for assessment practices, processes, and policy. The former founder and CEO of Measured Progress, Inc. he brings four decades of work in the assessment field including extensive, hands-on experience in the design, development, analysis, and reporting of innovative, large-scale assessment programs. He has served as a senior technical advisor to numerous educational organizations and worked for the Education Commission of the States, the University of Colorado, Clark University, and RMC. Dr. Kahl’s specialty areas include formative assessment, curriculum-embedded performance assessment, and teacher assessment literacy.

Stuart brings broad teaching experience from elementary school through graduate-level statistics and measurement courses and has delivered workshops and webinars in performance and classroom assessment. He presents regularly at regional and national conferences and frequently publishes research papers and commentaries on current issues and trends in education. As a researcher, he is recognized for designing innovative standard-setting procedures associated with non-multiple-choice item formats.

Dr. Kahl holds a BA in mathematics and M.Ed from the Johns Hopkins University. His doctorate from the University of Colorado in curriculum and instruction focused on research and evaluation methodology and mathematics education. The Association of Test Publishers (ATP) awarded Dr. Kahl the 2010 ATP Award for Professional Contributions and Service to Testing.

Mike Powell

Mike Powell / Technical Consultant

Mike Powell is the Lead Technical Consultant for Gibbs Advisors LLC, bringing industry expertise to help organizations solve the thorniest of problems. His sensitivity to client business drivers, coupled with a seasoned familiarity with the operational issues that complex assessment systems and programs must solve, enable him to deliver elegant solutions that enrich the organization’s success in this space.

Mike has architected award-winning solutions in artificial intelligence (AI) scoring and computer adaptive testing (CAT). His work in AI scoring won an independently administered third-party competition determining an approach and implementation that not only led the field, but also demonstrated a solution beyond the entire market’s then capability. He has also led the design and creation of comprehensive technical architectures used as the basis for the operational technical solutions endorsed by the Smarter Balanced Assessment Consortium (Smarter Balanced) and National Center and State Collaborative (NCSC). Validated in foundations developed with industry leaders, Michael has repeatedly proven his skill in leading technical businesses and organizations in pursuit of the industry’s most difficult problems.

Mike holds a Bachelor of Science (BS) and a Master of Science (MS) in Computer Science from North Carolina State University. With over 15 years of software development experience and 10 years in the education industry, he has a proven ability to realize opportunities for creating lasting and differentiated solutions and intellectual property.

Get in touch

Phone number
+1 (831) 238-6207