Senior Associate Engineer | LA

Make a difference with your change – lead with ingenuity!

KOA Corporation (KOA), as a Lochner Company, is a leading provider in professional services in transportation engineering, mobility planning, and construction management for public agencies and private sector clients. KOA engineers, planners, construction field specialists, and project managers all take pride in our well-established reputation as transportation safety experts. Our staff includes registered civil and traffic professional engineers, certified transportation planners, certified road safety professionals, project/construction managers, and construction inspectors.

In December 2022, KOA joined Lochner, a national transportation infrastructure firm headquartered in Chicago, Illinois, providing planning, environmental, design, construction engineering and inspection, and right-of-way services for surface transportation, rail, transit, and aviation clients. Together, we have more resources and capabilities for delivering innovative solutions and enhancing the quality of life in the communities we serve.

  • Client-Focused: We are collaborative and attentive to the unique needs and goals of each project.

  • Performance-Driven: We are problem solvers dedicated to transforming transportation infrastructure challenges into opportunities for innovation.

  • Community-Minded: We are vested in the work we do as stewards of public funds used to improve the communities we serve.

  • Socially Responsible: We give back to our communities by supporting various charitable organizations and causes.

  • Growth Oriented: We invest in programs to attract, retain, and develop employees so KOA becomes a long-term home for top talent.

Our goals and strategies promote a diverse and inclusive workforce that feels empowered to make a difference in the
world. Our vision is to create healthy and sustainable communities both within and outside of our organization, where current and future generations can thrive.

Are you ready to join us?


  • Minimum duties include leading the design tasks of various traffic engineering projects that may involve street improvements, traffic signals, roadway lighting, signing, striping, temporary traffic control, ITS, and fiber optic communications.

  • Preparing design plans, specifications, and estimates (PS&E) for traffic signals, roadway lighting/signing/striping, temporary traffic control and ITS elements.

  • Mentoring junior staff in their professional growth and enhancing their skills; leading and performing on a variety of projects in traffic operations and multi-modal transportation engineering.

  • Operational analysis of arterial networks, corridor signal synchronization/timing, and freeway corridors using simulation packages.

  • Proficiency in CADD applications.

  • Due to the nature of this job, travel to other offices will be required from time to time as well as overtime assignments during evenings and/or weekends.


  • 5+ years of experience in civil and traffic engineering.

  • California PE preferred.

The salary range for this position is between $90,000 and $110,000 per annum, based on experience and qualifications.