Gregory Harcos ’89
Chemistry / Director of Summer Programs / Frosh Basketball Coach

Joined Jesuit High School in 1998 as a full time teacher in the Science Department. Over the past two decades has served in many capacities: 

  • Teacher (1998-2015, 2019-present) Honors Chemistry, Chemistry, General Science, Geometry Science Department Chair/Academic board (2007–2015) 
  • Head Varsity Basketball Coach (2002-2015) 
  • Head of the Athletic Department (2015-2019) 

Married to Molly, with three children Jack (10), Cate (7), and Caroline (1) 


Mary Harrison
Administrative Assistant to the Dean / Summer Programs

Mrs. Harrison has been working at Jesuit as the Administrative Assistant to the Dean since winter of 2002. She also assists Mr. Greg Harcos, the Director of Summer Programs. For more information regarding our Summer Programs, please visit www.summeratjesuit.com. 


  • BS Business Administration – CSU Sacramento

First year working at Jesuit: 2002

(916) 480-2126