President & CEO
Jimmy H. Lin, P.E.

Mr. Lin has served as Principal-in-Charge or Project Manager on challenging and large-scale and design projects including planning traffic engineering, regional transportation planning, railroad engineering, ITS planning and design, and highway and freeway design projects with more than $500 million in construction.

38 years traffic and transportation engineering experience
Registered Professional Engineer in California, Kansas, Florida, Illinois and Washington
United Nations certified UNDP transportation expert providing technical services to China
Council Member, Diamond Bar, California
Planning Commissioner and Chairman, Diamond Bar, California
Traffic Commissioner and Past Chairman, Diamond Bar, California
Member/Past President, International Chinese Transportation Professional Association (ICTPA)
Former President, Kansas Consulting Engineers
Former ACEC National Director
Former four-term (1985-1993) Council Member, Leawood, Kansas
Former Member of State Water Board, Kansas

Chief Operating Officer & V.P. of Los Angeles Operations
Joel Falter

Mr. Falter has 33 years of experience in the field of transportation. He has prepared transportation master plans, as well as circulation element and corridor studies. He has extensive experience in traffic calming, complete streets, and non-motorized transportation.

33 years transportation planning and traffic engineering experience
Municipal and Private sector experience - regional government
Member, Institute of Transportation Engineers (ITE)
Member, Women's Transportation Seminar (WTS)
Member, American Planning Association
V.P. of Orange County Operations
Min Zhou, P.E.

Ms. Zhou's transportation engineering and planning experience include both private consultant companies and public agencies. She has conducted travel demand forecast modeling, traffic operation and studies, road design and engineering, database management and statistic analysis.

18 years traffic engineering and transportation experience
Registered Civil Engineer in California
Both Public and Private Sectors Experience
Member of WTS - OC Chapter
Member of APWA and ITE
Board Member of ICTPA Southern California Chapter
V.P. of Construction / Project Management Division
Chuck Stephan, P.E.

Mr. Stephan has diverse project experience in planning, design, management, and construction of transportation, educational, institutional, industrial, aerospace, municipal, residential and commercial projects. Mr. Stephan works in multiple capacities as Principal-In-Charge, project manager, project engineer, lead engineer, design engineer, and construction engineer in both the civil and construction management disciplines.

32 years of experience in engineering design, project management, and construction management
Registered Professional Engineer (Civil) in California, Oregon, and Hawaii
Member, American Society of Civil Engineers (ASCE)
Member, American Public Works Association (APWA)
Developed projects with various funding sources including local, state, and Caltrans administered
federal-aid funds; SR2S, SRTS, STPL, CDBG, ESPL, ARRA; grant applications and
reimbursement requests
  V.P. of Ontario Operations
Ming Guan, P.E.

Ms. Guan has 11 years of experience with work in street, highway, freeway, and interchange design including extensive experience in large scale highway engineering projects. She is an expert in geometric design and co-authored a technical textbook entitled “Highway Geometric Design using InRoads” along with Professor Xudong Jia of Cal Poly Pomona. She has a proven record of solving many of the regions’ most complex transportation issues with her solid understanding of transportation in both Civil and Traffic aspects. She is very familiar with state and federal requirements and has hands-on knowledge of Caltrans District 8, UPRR, and CPUP Standards.

Manager of San Diego Operations
Charles Schwinger, P.E., PTOE, AICP

Mr. Schwinger has integrated 38 years of experience in traffic engineering, civil engineering, transportation planning, and public engagement to provide practical solutions for his clients' transportation needs. As manager of KOA's San Diego operations, he is committed to assembling the right project team for each project to best serve the client's interests.

38 years of transportation planning and engineering experience
Graduated in Civil Engineering from Iowa State University
Member, Institute of Transportation Engineering
Member, American Planning Association
Chief Financial Officer
Juan Gutierrez

Mr. Gutierrez is responsible for the firm's strategic financial planning, including profit/loss, capital financing, cash flow operations, and ensures compliance with local, state and federal reporting requirements. Provides leadership and coordination in the administrative, acquisition, budgeting, and project management efforts of the company.

15 years of financial and fiscal management experience
Member of Institute of Management Accountants (IMA)
Knowledgeable of Generally Accepted Accounting Principles
Has extensive knowledge of accounting system conversions, and has developed and implemented finance,
billing and auditing procedures for KOA
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