Contracts
During the first 10 years of operation, Diablo has executed more than 200 contracts.
Teaming
Diablo is the Prime Consultant for more than 70% of the executed contracts. In addition, Diablo team members have earned an excellent reputation of organizing multidiscipline teams to achieve challenging project schedules.
As a Prime Consultant, Diablo partners with expert specialty firms and individuals – many of which we have worked side-by-side with for more than 25 years.
As a Subconsultant, Diablo consistently partners with larger engineering firms that have a strong commitment to establishing long-term collaborative relationships with small local businesses. Diablo provides meaningful design development and project coordination services to our Prime teaming partners, and we work very hard to earn the opportunity to be included on future contracts.
Major Infrastructure Improvement Projects
Even as a small local business, Diablo continues to be significantly associated with several major multi-million-dollar infrastructure programs and projects. We work on very exciting and meaningful transportation infrastructure projects!
Over several decades prior to the formation of Diablo Engineering Group, Diablo team members managed the delivery of many multidiscipline major public infrastructure projects throughout California. Building upon this prior transportation infrastructure design and management experience, the Diablo team continues to support major infrastructure projects throughout the Bay Area. Diablo is uniquely positioned to directly support public agencies as Staff support for the programming, management, design, and delivery of multi-million-dollar infrastructure programs and projects. In addition, Diablo team members provide valuable design and coordination services to large engineering firms that are responsible for delivering major infrastructure projects.
Local On-call Municipal Projects and Private Development
Diablo has the skills and expertise to manage the delivery of small and medium sized transportation engineering, transportation planning, and structural engineering design projects. These small and medium size local projects include road diets to accommodate transit lanes, bicycle lanes, cycle tracks, sidewalk, and curb ramp reconstruction; community space redevelopment to accommodate park enhancements, access to community pools and restrooms, and reconstruction of other public recreation spaces; and supporting local residential contractors and homeowners towards the remodeling of single-family homes.
JENNIFER HARMON, PE
PRESIDENT, Principal and Project Manager
President and working principal responsible for Diablo’s operations, design delivery and team leadership. She prides herself on the ability to understand and strategically navigate larger goals while remembering the important details and decisions along the way. Clients have commented that they appreciate her organizational skills and historical knowledge on projects.
Professional Civil Engineer with extensive design and management experience associated with public works and redevelopment projects. Her work has included geometric evaluations and layouts, utility coordination and design, grading plans, roadway plans and profiles, and preparation of final construction documents for road widening, complete streets, highway design, interchange improvements, and environmental document and right of way coordination.
REGISTRATION:
Civil Engineer, California, 2002, 63909
EDUCATION:
1999, B.S. Civil Engineering, California Polytechnic State University, San Luis Obispo
GARRETT GRITZ, PE
Principal and Project Manager
Professional Civil Engineer who has been designing and managing the designs for major public works infrastructure projects for more than 35 years. He is especially recognized for his abilities to orchestrate a broad range of the multidiscipline design elements that must be properly coordinated throughout the design development process. He has the very important ability to effectively listen to the needs and requirements of project development design influencers (public works professionals, design team leaders, agency partners, permitting authorities, utility companies, and community stakeholders), and then collaboratively solves challenging engineering problems and political issues. He also integrates himself into the details of the project issues and becomes a true partner with the many people involved to collaboratively solve technical problems. Mr. Gritz is also recognized as an excellent mentor – supporting young engineers, planners, and other design professionals throughout the process of improving our communities.
REGISTRATION:
Civil Engineer, California, 1992, 49126
Civil Enigneer, Idaho, 2023, P-2193
EDUCATION:
1988, B.S. Civil Engineering, California Polytechnic State University, San Luis Obispo
JOHN KENYON, PE
Vice President – Highway and Bridge Practice Leader
Professional Civil Engineer with 30 years of experience designing and managing major engineering and transportation projects. His work has included managing the planning, environmental clearance, and delivery of plans, specifications, and estimates that improve Bay Area freeways, interchanges, state highways, and local arterials. He has a reputation as an exceptional manager of large and complex transportation projects that require the skillful coordination of multidiscipline design professionals.
REGISTRATION:
Civil Engineer, California, 2001, 61281
EDUCATION:
1995, B.S. Civil Engineering, California State University, Chico
JUSTIN BRUE, PE
Project Engineer / Structural Engineering Manager
Mr. Brue has a wide array of experience in both technical and managerial roles throughout his professional career. Mr. Brue has the very important ability to effectively listen to stakeholders and then respond both quickly and efficiently to provide a solution. His experience includes designing, detailing, and preparing construction documents for reinforced concrete, steel, masonry, and timber structures as well as designing foundations and pipe supports for various applications. Justin has also performed condition assessments on concrete, masonry and steel building structures using a variety of technical and visual methods. He also has defined and developed repair programs that mitigate the structure’s deterioration, restore its integrity, and extend its useful service life. In addition to his assessment and design experience, Justin has provided construction management and construction support for capital improvement projects, such as large-scaled paving, traffic signal/civil improvements, and sewer rehabilitation projects. His experience also includes a multitude of different structural residential projects, serving clients with their permitting needs.
REGISTRATION:
Civil Engineer, California, 2017, 87614
EDUCATION:
2014, B.S. Structural Engineering, University of California, San Diego
CAMERON LANE, PE
PROJECT ENGINEER
Cameron joined the Diablo Engineering Group team after several years of working for heavy civil construction contractors – where Cameron managed projects and construction crews to improve public and private infrastructure. For 8 years he worked on complex drilling and shoring projects of various sizes throughout the state of California. He combined strong engineering knowledge with proactive communication skills to deliver projects within budget and on schedule. Many of his projects were design-build, giving him the opportunity to carry them from conception to completion. As a professional engineer he has developed designs for the seismic bracing of ceiling-mounted electrical equipment, anchorage of nonstructural components, and structural steel for suspended theater catwalks. Because of his construction experience, he is uniquely qualified to perform constructability reviews for projects prior to advertisement, saving clients time and money by reducing RFIs and re-design costs.
REGISTRATION:
Civil Engineer, California, 2024, 95905
EDUCATION:
2015, B.S. Civil Engineering, California Polytechnic State University, San Luis Obispo
ALEKSANDRA TORBICA
Senior Designer
Ms. Torbica has over 30 years of experience in civil engineering and drafting. Most recently she is responsible for preparation of preliminary and final plans for transportation projects, including highways, road widenings and roadway improvements, with detailed intersection design with ADA compliant curb ramps. Her additional design responsibilities include: existing utility research and coordination, storm drain design, water line design, signing and striping, construction staging as well as quantity takeoffs and engineering estimates. Ms. Torbica is experienced in the use of Civil 3D, AutoCAD, Land Desktop, AutoTurn, Microstation, Inroads, Microsoft Office Suite.
REGISTRATION:
AutoCAD and Civil 3D Expert
EDUCATION:
1993, BS, Civil Engineering, University of Sarajevo, Bosnia and Herzegovina
MIGUEL VAZQUEZ
DESIGN ENGINEER
Miguel has been a member of the Diablo Team for over two years. He has experience in preparing plans, estimates, and specifications for transportation projects, especially those relating to accessibility improvements and bicycle facilities. Miguel’s plan preparation experience includes typical cross sections, key maps, street improvements, grading details, signing and striping, including ADA parking analysis and improvements for public roadways.
REGISTRATION:
Miguel has obtained his Engineer in Training Certification, the first step in becoming a registered engineer.
2024, EIT 183273
EDUCATION:
2023, B.S. Civil Engineering, California State University, San Jose
JOSE RODRIQUEZ
DESIGN ENGINEER
Jose has been a member of the Diablo Team for over one year. He has experience in assisting in the preparation of plans and estimates for transportation projects, especially those relating to accessibility improvements and bicycle facilities. Jose’s plan preparation experience includes typical cross sections, key maps, street improvements, grading details, signing and striping. Jose has also assisted with grant application write ups.
REGISTRATION:
Jose will be taking his Engineer in Training Certification
test this year.
EDUCATION:
2023, B.S. Civil Engineering, California State University, San Jose
MATTHEW CANDLER
DESIGN ENGINEER
Matthew joined the Diablo Engineering Group team full-time after graduating from San Jose State University in Spring 2025 with a B.S. in Civil Engineering. He previously interned with the firm during Summer 2024, gaining hands-on experience in transportation design and plan preparation. His work includes preparing quantities, bid lists, grading plans, and encroachment permit packages, along with designing ADA-compliant curb ramps for public infrastructure projects. Matthew brings a strong foundation in civil engineering and a commitment to quality in every aspect of project delivery.
REGISTRATION:
Matthew has obtained his Engineer in Training Certification, the first step in becoming a registered engineer.
2025, EIT 184173
EDUCATION:
2025, B.S. Civil Engineering, California State University, San Jose
CHRIS GJERDE
PROJECT ENGINEER & it mANAGER
Professional Civil Engineer and IT Manager with over 30 years experience with public works and information technology. His work has included all phases of capital improvement projects from hands on design through construction management for all types of municipal infrastructure including streets and traffic signals.
REGISTRATION:
Civil Engineer, California, 1993, 51516
EDUCATION:
1988, B.S. Civil Engineering, California Polytechnic State University, San Luis Obispo