ABOUT IDC

Homegrown in Southern California, IDC is driven by a team of seasoned professionals with experience spanning continents.

Who We Are

Established in October 1995, IDC Consulting Engineers Inc. has grown to become one of the most recognized structural design firms in Southern California. With offices strategically located in Orange County and San Bernardino County, we specialize in delivering high-quality structural and civil design services across various sectors. Our client base includes local and regional agencies as well as numerous prominent engineering firms throughout Southern and Northern California.

Our Expertise

Structural Design Services: IDC boasts a team of key engineers with over 90 years of combined experience in bridge design. Our portfolio includes more than 100 bridge projects, showcasing our ability to provide technologically advanced, cost-effective, and innovative structural solutions. We are proficient in designing highway bridges, grade separations, heavy rail, light rail, waterway structures, and buildings.

Civil Design Services: Our civil design expertise includes roadway design, grading, drainage, utility coordination, and construction support. We have successfully delivered numerous projects, ensuring compliance with local and federal regulations while addressing the specific needs of each project.

Project Management and Construction Management Services: IDC excels in providing comprehensive Project Management (PM) and Construction Management (CM) services. Our PM/CM team ensures that projects are delivered on time, within budget, and to the highest quality standards. We offer a full spectrum of services from project planning and coordination to construction oversight and post-construction evaluations. Our expertise includes:

  • Schedule Management

  • Budget Control

  • Quality Assurance and Quality Control (QA/QC)

  • Risk Management

  • Contract Administration

  • Stakeholder Communication

  • Regulatory Compliance

Specialized Services:

  • Seismic Analysis

  • Construction Staging

  • Structural Design

  • Civil Design

  • Independent Design Checks

  • Permitting and Local Agency Coordination

Our Certifications

IDC is a certified Small Business Enterprise (SBE), Underutilized Disadvantaged Business Enterprise (UDBE), Disadvantaged Business Enterprise (DBE), and Women’s Business Enterprise (WBE).

Our Leadership

  • Wendy Li, PE

    PRESIDENT & CEO

    Wendy Li is a seasoned leader with over 30 years of experience, specializing in public agency processes and transportation programming. As a former Caltrans engineer, she has designed various infrastructure projects. Now as leader of IDC, Wendy guides the firm in delivering world-class services and innovative solutions.

  • Greg Dreeszen, PE

    VICE PRESIDENT

    As part of the firm’s leadership, Greg Dreeszen leverages his over 24 years of experience in transportation projects. Leading an innovative design group at IDC, he focuses on using advanced technologies for efficient project delivery. Greg specializes in bridge design, seismic retrofitting, and Design-Build projects, managing projects up to $1.3B.