After graduating from the University of Rhode Island with a bachelor degree in Business Administration, David went to work for Modern Continental Construction Company working on the Central Artery Tunnel Project in Boston, Massachusetts (The Big Dig), as a Purchasing Agent purchasing large scale construction materials and fleet vehicles (cars, light duty and heavy duty trucks) for construction operations.
Deciding to leave the cold weather, David moved to Turlock, CA and came to work for the Turlock Irrigation District as a Senior Buyer and soon after, he was promoted to the Position of Purchasing Supervisor.  David worked closely with the Fleet Department, purchasing all vehicles for the fleet since his arrival to the District.  In August of 2010, the position of Fleet Analyst opened within the District and was a perfect fit for David to work exclusively with the District’s fleet.  In 2016, David joined the City of Modesto, California, as their city’s Fleet Manager, managing 1,100 vehicles and pieces of municipal equipment.
David became an official member of NAFA in October, 2010.   He is excited to be serving NAFA.  

​In 1994 Derek Legge continued his automotive training right out of high school by completing both the Engine Performance  and Engine Machining programs at De Anza College in Cupertino CA. From there he worked as a mechanic at a couple of local automotive repair shops in his home town of Santa Cruz CA. In 2000, Derek joined the Operating Engineers Local 3 Apprentice program as a Heavy-Duty Repairman and went to work for West Valley Construction. Since then he has moved up the ranks to the position of a Fleet Manager. Derek has been a NAFA member since 2012 and has also completed the CAFM program.

Richard Callis

Chapter Vice Chair

Jimm Vosburgh serves as Vice President of Corporate Assets for West Valley Construction, an underground utility contractor with 8 locations in California and 1 in Nevada.  Jimm has been involved in construction fleet maintenance and management for over 30 years.  He started his career in the Operating Engineer’s Local 3 apprenticeship program as a Heavy Duty Repairman. He spent 16 years repairing heavy equipment in a quarry and on highway, dam & land development projects around the state. He transitioned into fleet management in 1996, before joining West Valley Construction in 1998.

Jimm has been a NAFA member since 2002, CAFM since 2008.  He looks forward to serving as a Chapter Officer.

Our Team

David Barr


Richard Callis is currently the Fleet Services Manager for INTREN, INC, a utility construction contractor, serving Utilities across 5 states, including 9 locations in California.

Richard has been in the transportation industry for over 30 years and the last 15 years as a fleet manager.  He started as a heavy duty mechanic in 1985, working his way up from the shop floor to his first fleet manager’s position in 2000 for a moving company. From there, he’s managed various fleets from refrigerated OTR trucking to the last 10 years in tree industry. In 2015, Richard accepted the challenge to manage INTREN’s west coast fleet operations.

Richard has been a member of NAFA since 2011 and has served on the NAFA/TCIA Utility Line Clearance Committee for 2 years. He looks forward to serving our chapter and the organization that’s given him so much. 

Jimm Vosburgh, CAFM

Chapter Chair

Derek Legge, CAFM


Affiliate Chair - Norma Havens -

Membership Chair - Dan McCann

Program/Technology Chair - Frances Telles