In 2011, Holzschlag worked for Knowbility, teaching classes on Open Web technologies such as HTML5 and ARIA, with a strong emphasis on using inclusive design to overcome accessibility barriers. She has also taught webmaster courses for the University of Arizona, University of Phoenix, New School University, and Pima Community College.

Holzschlag was a speaker on Open Web technologies, web design and accessibility. She was the 2004–2006 group lead for the Web Standards Project (WaSP), a coalition that campaigned browser makers such as Microsoft, Opera and Netscape to support modern web standards.

Molly E. Holzschlag (born January 25, 1963) is a U.S. author, lecturer and advocate of the Open Web. She has written or co-authored 35 books on web design and open standards, including The Zen of CSS Design: Visual Enlightenment for the Web (co-authored with Dave Shea).