Focused on clients,

driven by solutions.

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Photo courtesy of Port of Long Beach


At the onset of every task or contract, we meet with client managers to understand not only the project’s objectives, but also their expectations. From design development through project closeout, our primary goal is always to represent the interest of the owner. We achieve this by serving as an integral part of the team,  implementing a proactive approach, providing cost-effective support and presenting functional solutions to eliminate/mitigate adverse impacts to the project’s success. Following is the range of support services provided by our team of experienced staff:


  • Program/Project Management

  • Constructability Review

  • Design Support

  • AAA Support

  • Master Scheduling

  • Cost Estimating

  • Delivery Method Selection

  • Permit Acquisition

  • Value Engineering

  • Contractor Pre-qualification

  • Design Consultant Oversight

  • RE, CCO, CM Manual Development


  • Pre-construction Survey

  • Contract Administration

  • Safety Monitoring

  • Permit Compliance

  • Office Engineering

  • Submittal and Work Plan Review

  • Engineering and Inspection

  • Scheduling

  • Change Management

  • Utility Coordination

  • Public Outreach

  • Claim Resolution

  • Labor Compliance


  • Punch List

  • Testing, Commissioning and Turnover

  • Final Acceptance Walks

  • Warranties and Guarantees

  • Finalize As-built Drawings

  • Project Close-out

Coming off of the recent success in delivering statewide services to Caltrans’ METS for materials quality assurance, we have also emerged as leaders in the field of materials engineering, source inspection and testing. Following is a synopsis of the materials related services we provide to the state and other local agencies:

  • Material (Source) Inspection: Concrete, Piles, Anchors, Masonry, Fireproofing, Welding, Bolting, Structural Steel Fabrication, Pre-Cast Pre-Stressed Concrete Elements, Steel Rocker Bearings, Bearings

  • Field Technicians: ACI, Pull Testing, ASNT LEVEL II, III and NACE Level II, III

  • Material Sampling: ASTM, Green Book, CTM



Across California, our project teams implement a lessons-learned approach while seeking innovative solutions to accomplish the essential goals of project delivery — on schedule, within budget and with a positive perception. No project is big or small; we partner with clients to overcome complex challenges throughout the project lifecycle and hold ourselves accountable for its successful completion.


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PreScience Corporation traces its lineage to Lim And Nascimento (LAN) Engineering (founded in 1994), with core practice in design as well as construction management of highway, bridge and rail projects. At the time of the LAN-AECOM merger in 2009, LAN, consisting of more than 200 professionals, had established itself as one of the largest transportation consulting firms in California. It had a reputation for working closely with owners and project stakeholders to successfully deliver projects with a high level of community acceptance. In 2013, the former LAN principals established PreScience, a California corporation, based on the same founding principle of ‘placing the interests of our clients and the projects we serve above everything else’.



In a mere 7 years since inception, we have emerged as one of California’s leading Project Management (PM), Construction Management (CM), Construction Engineering and Inspection (CM-CEI) and Materials Engineering (ME) firm, comprised of over 70 professionals (including 20 registered California Professional Engineers) engaged in supporting project delivery with exceptional outcomes.


As we make strides in outstanding project delivery, we are embracing the future by setting goals for innovation. By utilizing digital technology and innovative methods, our construction managers are positively influencing project outcomes, enhancing progress reporting and improving communication. We are also investing in the future by building a workforce replete with recent graduates/interns who bring talent and ideas. We offer them limitless career potential to deploy their education and knowledge in delivering game-changing projects. Having built a reputation for excellence in transportation, we are exploring opportunities to diversify into other infrastructure segments including water, ports and buildings/facilities.


At PreScience, we firmly believe that ‘people, not companies, deliver successful projects’. Our corporate structure is efficient, non-hierarchical and versatile. From the CEO to the intern, each individual is ‘boots-on-the-ground’, ‘hands-on’ engaged in project delivery. Our efficiency is also reflected in the project teams we assemble for our clients, comprised of cross-trained, multi-tasking individuals who accomplish the project goals. We are known in the industry for our accessibility, responsiveness and flexibility.

We thrive on repeat client business and are always seeking new partners to fulfill their mission of creating and maintaining a safe, sustainable and environmentally compliant infrastructure for transportation of people and goods.


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Chuck Tran, PE


Senior Project Manager

Chuck has expertise in all facets of CM-CEI practice, gained from 31 years of experience in highway, bridge and transit construction, including resident engineering and project/program management. As a working Principal, he holds the trust of clients to successfully deliver projects and is passionate about mentoring personnel to function at the best of their abilities. He is driven by his vision to grow the organization by attracting and nurturing industry's best talent.

Peter Ho, PE


Senior Project Manager

Peter has over 41 years of experience in the delivery of complex projects in the transportation infrastructure sector involving complex staging and multiple stakeholder coordination. His diverse background includes Contractor experience as well as Resident Engineering/Project Management for Clients including Caltrans and prominent agencies such as ACTA, OCTA and ACE. Regarded as a grade separation expert, his passion includes solving problems and deriving positive results for client. His outstanding contribution to California's construction industry was recognized in 2013 through an AGC California S.I.R. award.


SANDAG On-Call CM Services Contract Awarded Through 2026

April, 2021

We are pleased to announce that  PreScience has been selected as one of the Primes for the SANDAG (and MTS) on-call CM services contract. This is a task order based Indefinite Definite Indefinite Quantity (IDIQ) contract for a 5 year duration.


SANDAG is San Diego region’s premier development agency that works in collaboration with Caltrans, NCTD, MTS and local agencies. This agency is a new client focus for PreScience, and we are thrilled to working with SANDAG.

We expect work related to this contract to begins in Summer 2021. SANDAG is planning several projects which include double-tracking, roadway/bridge, bikeways/bike paths, transit improvements and facilities. 




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125 Columbia, Suite A,

Aliso Viejo, CA 92656

(949) 600-8631


887 Island Drive, Suite 220D

Alameda, CA 94502

(510) 560-2483


1451 River Park Dr., Suite 220

Sacramento, CA 95815

(949) 600-8631


8525 Gibbs Dr #202,

San Diego, CA 92123, USA

(858) 283-0331