Senior Engineer (Civil) | OC

Make a difference with your change – lead with ingenuity!

KOA Corporation (KOA), 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. 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?


  • Application of diversified knowledge of transportation engineering and design principles across a broad range of projects

  • Provide roadway and intersection design guidance and support with responsibility for all aspects of project and client management, project development, business development and mentoring and guiding junior level staff

  • Orchestrate project teams of various sizes and skills and manage staff and subconsultants across multiple offices and locations

  • Be responsible for quality assurance and quality control through the development and review of construction plans, specifications and estimates

  • Interface with clients and look for and create opportunities to take on additional responsibility as you manage your own career path

  • Represent clients and the firm at project meetings, open houses and/or public hearings

  • Check construction plans, design calculations, or cost estimates to ensure completeness, accuracy, or conformity to engineering standards or practices

  • Identify complex problems and review related information to develop and evaluate options and implement solutions

  • Evaluate designs or specifications to ensure quality


  • Bachelor’s Degree in Civil Engineering or related field

  • California PE license

  • Minimum of 8-10 years of experience managing projects and staff

  • Prepare proposals and participate in proposal interviews

  • Participate in business development activities with clients

  • Strong communication skills

  • Strong technical writing skills

  • Strong knowledge of civil and traffic engineering concepts

  • Proficiency in CADD applications such as AutoCAD, Civil 3D, and Bluebeam Software

  • Working knowledge of relevant design standards and guidelines such as Caltrans Standard Plans & Specifications, APWA Greenbook, Caltrans Highway Design Manual, and California MUTCD

The salary range for this position is between $120,000 and $150,000 per annum, based on experience and qualifications.