25% off all 2020 Summer Courses
Discount applies to courses starting before September 1. Not applicable toward Legal or Paralegal Studies courses.
Coronavirus (COVID-19) Update
All summer & fall classes are offered remotely—either live-online with an instructor, entirely self-paced, or in a blended online format. Please check our coronavirus update page for our latest announcements.
David J Keenan
DAVID J. KEENAN, B.S., is an environmental health and safety consultant with Performance Safety Associates. He has 34 years of experience in environmental health and safety. He has taught at UCSC Extension since 2001.