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San Joaquin Delta College
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 Applied Science, Business & Technology
Applied Science, Business and Technology

Gillian Murphy

Gillian Murphy

Division Dean

(209) 954-5230

Diane Rosenstine

Diane Rosenstine

Division Secretary

(209) 954-5230

Cathy Davis  

Electron Microscopy Technician

(209) 954-5246


Holt Building, Room 140


Division Office Hours

Monday - Friday     8:00 am - 5:00 pm          



General Electrician Certification Program

Work Experience Program

This program is not

Federal Work Study


Faculty Information

Sean Alford

Mr. Sean Alford

Diesel Technology/Heavy Equipment/CAT

Sergio Calderon Mr. Sergio Calderon
Cisco / Electronics /Electrical Technology

Mr. Calderon joined our division in August of 2009 bringing 28 years experience in/as Electronics Technician, Surveillance design and layout, Cisco Regional Instructor for San Joaquin Delta College, Cisco Security Instructor.  He is A+ Certified and knowledgable in General Construction. Mr. Calderon holds honors as an IEEE member, Employee of the year 2007 Circuit City, Master Technician 2006, 2008 .
Dean Danielson

Mr. Dean Danielson


Dean Danielson has taught a variety of business classes since joining Delta College in1990. These include Introduction to Business, Supervision and Human Relations, Economics of Business, Personal Finance, and Introduction to Business. Prior to joining Delta College, Dean worked in manufacturing management for Procter and Gamble. He was an infantry officer in the Army for 6 years after graduating from the U.S. Military Academy in 1971. He received his MBA at the University of Utah. Dean is married, lives in Modesto, and has 2 grown children. He enjoys reading and outdoor activities such as skiing and kayaking.

Rich Dettloff Mr. Richard Dettloff
Fluid Power Technology

Mr. Richard Dettloff teaches students all they would ever want to know about Fluid Power. He is well educated in this discipline and dedicated to sharing his knowledge with students. Mr. Dettloff is also part of the Caterpillar ThinkBig Program.
Danell Hepworth Ms. Danell Hepworth
Engineering / Engineering Technology
Bennett Howser

Mr. Bennett Howser
Engineering / Engineering Technology

Ben received his BS and MS in Engineering & Applied Sciences from Yale University, and his PhD in Mechanical Engineering from Northwestern University.  He spent 24 years in industry as an engineer and manager, primarily in flat metal processing (ALCOA, Steel Technologies),  metal tubing manufacturing (Norandal, Wheatland Tube Co.), and heat exchanger manufacturing (G&O Mfg, JB Radiator Specialties).  Ben will be teaching both E-Tech and Engineering Classes.  He is looking forward to building more bridges between the program and local industries, to ensure that Delta students fulfill the needs of the local companies and organizations, and to help our graduating students find employment.

Kathy Huff Ms. Kathy Huff
John Krupp

Mr. Jon Krupp

Electron Microscopy

Jonathan Krupp joined the Delta faculty as a full time instructor in 2008. Prior to that he was the coordinator of the Microscopy & Imaging Laboratory at UC Santa Cruz for 22 years. He received a BA in Botany and an MA in Biology from Humboldt State University and a BS in Biological Sciences and PhD in Botany from UC Davis. In addition he has done post-doctoral work at UC Davis and the Bodega Marine Lab and served as a consultant on many projects.

Alberto Luna

Mr. Alberto Luna
Automotive Technology

Mr. Luna is a recent addition to our full time faculty at Delta College. He is a graduate from the Delta College Automotive Technology Program. Mr. Luna has many years of experience in the field while working for a G. M. dealership and the City of Stockton fleet maintenance department.  He returns to Delta to share his wealth of knowledge in the automotive technology field with his students.

Joey Mac Isaac

Mr. Joey Mac Isaac

Mechanical Technology

Larry Mariani Mr. Larry Mariani
Auto Body Technology

Mr. Mariani is a recent addition to our Auto Body Technology Program as a full time instructor.  Prior to joining our ranks he has operated a highly successful auto body repair facility in Stockton.  He looks forward to sharing his experience and knowledge with his students.
Scot Martin Mr. Scot Martin
Heating and Air Conditioning Technology

Mr. Scot Martin graduated from Delta College's HVAC program and continued his education at CSU Fresno in Industrial Technology. He has earned many certifications and with his knowledge and skills began his own business. He has now returned to Delta as a full time instructor, offering his expertise to the students in the same program in which he graduated.
Craig McAlister Mr. Craig McAlister
Automotive Technology - Electric

Mr. Craig McAlister's knowledge and skills are a gold mine for the college! He is involved in many Automotive endeavors such as the GMASEP program, SMOG certifications, and the Automotive Auxiliary Foundation. His participation in a students education is intense and well respected.
Jennie Noriega

Ms. Jennie Noriega

Business Information Management/Computer Information Science

Larry Paulsen Mr. Larry Paulsen
AG Engineering / Small Engine

Mr. Larry Paulsen can be seen running around on campus, not because he is over 6' tall, but because he is active with many events in addition to his teaching assignments. Larry Paulsen is a member of the Agriculture Foundation and the Caterpillar ThinkBig Program.
Alicia Lopez-Stewart

Ms. Alicia Lopez-Stewart

Business Information Management/Business

Ken Pekerek Mr. Ken Pekarek
Heavy Equipment / Diesel Technology

Mr. Ken Pekarek, known to his students as "Mr. P", can often times be found in, under, or near a diesel engine as he teaches students in the Diesel Technology Program. Mr. P is also active in the yearly VICA and the ASE Mini Baja competitions all over the state and he is part of the Caterpillar ThinkBig Program.
Alex Taddei Mr. Alex Taddei
Welding Technology

Mr. Taddei comes to Delta College with 30 + years experience as a Welding Supervisor, Maintenance Technician, and as our adjunct faculty instructor since 2001.  Alex is a graduate of Delta College with an A. A. degree in Industrial Technology and a certificate in Fluid Power. He holds a certificate in Communication and Supervision from UOP.  Alex has earned two certifications from the American Welding Society as a Welding Inspector (1987 - present) and a Welding Educator (1992 - present).
Dave Thomas

Mr. David Thomas
Electrical /Solar Technology

David N. Thomas Sr. is an Associate Professor in the Department of Electrical and Solar Technology as of the Fall of 2012. He has an extensive knowledge and experience in the electrical industry as a Certified General Electrician and Fire Alarm Technician, licensed Electrical Contractor and IBEW/NECA Apprenticeship Instructor.  Mr. Thomas has completed an A.A. from Butte College, B.A. and M.A. from Sacramento State University. Furthermore, he has completed the IBEW/NECA Inside Wireman Apprenticeship and Electrical Master Instructor programs. He is a current member of the International Brotherhood of Electrical Workers and International Association of Electrical Inspectors.

Frank Villalovoz

Mr. Frank Villalovoz

Electron Microscopy


Martha Villarreal

Ms. Martha Villarreal


Chris Wardell

Mr. Chris Wardell


Mary Jo Zimmerman

Ms. Mary Jo Zimmerman
Electrical Technology

Ms. Zimmerman began teaching at Delta College in the Fall of 2007.  She holds a B. S. in Vocational Education and is a Journeyman card holder in the state of Michigan, as well as various certifications in the electrical field.  She has also taught in high schools, trade schools and colleges in Michigan.  Ms. Zimmerman's knowledge and dedication is a key component for the continued success of the electrical program and the students. 



Connect With Us

San Joaquin Delta College
5151 Pacific Ave
Stockton, California 95207
(209) 954-5151