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We're thinkers and doers with a passion for big change and shaping the future of our communities.

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Domingo Leon founded D'Leon Consulting Engineers in 1987. Under Mr. Leon’s leadership and professional experience, DLCE grew to hold an active role in Southern California's engineering community as a whole. Nearly 40 years later, D'Leon engineers, managers, and project admin continue to contribute to the development of major public infrastructure projects in California and beyond.

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Borja Leon, PE


Borja Leon is a transportation and infrastructure professional with close to 20 years of experience in both the private and public sectors. He has led the advancement and implementation of major infrastructure projects in the Los Angeles, Orange County, San Diego and Sacramento. He joined D’Leon Consulting Engineers in November 2018 and is the Managing Director for all the company’s transportation, aviation, construction and program management practices.

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Ryan Browne


Ryan Browne is an experienced civil engineering professional with over 20 years of project management and design experience. Mr. Browne applies his civil design knowledge and project management experience during all phases of complex transit and infrastructure projects. 

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Paul Spiteri, EIT


Paul Spiteri has 21 years of experience in civil engineering design and construction management with a project history totalling over $18 billion.  Mr. Spiteri has worked on airport modernization, transportation infrastructure (bridges, tunnels, railways, and roads) as well as land development.  

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Tess Nguyen


Tess comes from a diverse background in administrative and operation management, working in multiple industries such as retails, health care, and civil engineering. Here at D’Leon, Tess manages the behind the scene operations, which include but are not limited to, vendor/client relations, budget, project proposal, document control, and streamlining processes. 

Our Team

Join our team.

We are always looking for self-motivated, creative, and skilled engineers and manager to join our team. If our work and company philosophy aligns with your talents and goals, please reach out.

Contact us or Browse available positions.

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