About The 508 Institute
Headquartered in Washington, D.C., The 508 Institute has offered 508 solutions and digital accessibility expertise for 20 years. We use a hands-on educational approach to assist organizations in meeting accessibility goals. We follow industry benchmarks that meet or exceed the requirements of Section 508 of the Rehabilitation Act and the World Wide Web Consortium (W3C) Web Content Accessibility Guidelines (WCAG).
The success of The 508 Institute is dependent on maintaining the highest standards and strongly adhering to our core values.
OUR TEAM
Meet the Experts

Hiyan Sisson
Creative Director
DHS Trusted Tester, IADP, Guest Lecturer GW
Hiyan Sisson has more than 20 years of experience leading large multidisciplinary teams across federal, state, and commercial projects. She oversees designers, accessibility specialists, videographers, editors, and web developers, guiding complex creative and compliance workflows for agencies including NPS, USDA, HHS, VA, DOT, and DOS.

Prudhvi Mandava
Administrator and 508 Compliance Manager
DHS Trusted Tester, Guest Lecturer GW
Prudhvi Mandava has more than 10 years of experience leading accessibility compliance and remediation for federal, state, and commercial clients, including NPS, USDA, HHS, VA, and DOI. He has overseen the remediation of more than 115,000 pages of documentation. With the admin team at the 508 Institute, he leads the support and effort for client experience and governance.

Michelle Piehl
Instructor
DHS Trusted Tester, Instructor GW
Michelle Piehl developed and actively teaches an Accessibility in Digital Publishing course in the George Washington University Master of Publishing program. She also uses Adobe, InDesign, Microsoft Word, and Calibre to apply her accessibility expertise to make digital publications, such as websites, EPUBs, and PDFs, more equitable to all. In her spare time, she volunteers her accessibility knowledge to support a local nonprofit.
TESTIMONIALS
What Our Clients Say
Trusted by federal agencies and organizations across the country to deliver
results-driven accessibility training, remediation, and consulting services.
Thank you guys; I consider it a real privilege to be among you two and have your complete full attention.
Bill L.
My entire experience has been extremely positive. Not only was the course well run and informative, but you’ve all been extremely generous with your time and have gone out of your way to meet with me and answer all of my questions.
Abby S.
This has been so incredibly helpful to highlight all the things we have historically done wrong.
Sayuri K.