Dr. Brennan has worked with the following California educational institutions:

Mt San Antonio College (CA); Santiago Canyon College (CA); Cuyamaca College (CA); El Camino College (CA); Foothill College (CA); Mission College (CA); Cabrillo College (CA); Modesto Junior College (CA); Chaffey College (CA); Cabrillo College (CA); individual and small group faculty from dozens of additional California Community Colleges; Woodbury University (CA); and numerous California State University campus faculty.

In the Western United States region, he has worked with educators at the following institutions:

Mount Hood Community College (OR); Lane Community College, (OR); Columbia Basin College (WA); Everett Community College (WA); Umpqua Community College (OR); University of Hawaii-Hilo (HI); University of Nevada-Reno (NV); Kauai Community College (HI); University of Hawaii (HI); US Air Force Academy Prep School (CO); Bellevue Community College (WA).

After completing a training with a large group of educators from Mount Hood Community College, the college implemented their success program in Fall 2004 and increased retention rates by 27% for nearly five hundred first time to college students.  These improved retention rates have persisted over the last several years.

Across the United States, and internationally, he has worked with educators at the following institutions:

University of Rio Grande (OH); Cuyahoga Community College (OH); University of Missouri-Rolla (MO); Madison Area Technical College (WI); Sisseton-Wahpeton Tribal College (SD); South Plains College (TX); University of Tennessee-Martin (TN); Corning Community College (NY); El Centro College (TX); Cuyahoga Community College (OH); Milwaukee Area Technical College (WI); and Northern Alberta Inst of Tech (Alberta, CN).