Jacob & Hefner Associates

  • Business Services
  • Consultants
  • Contractors/Specialty
  • Engineers
  • Land Development
1333 Butterfield Road
Suite 300
Downers Grove, IL 60515
(630) 652-4640
  • About

    Jacob & Hefner Associates, Inc. (JHA) is a civil engineering, land surveying, and environmental services firm with offices in Illinois, California and Georgia.
    Civil Engineering:
    The JHA engineering team is licensed in multiple states and has extensive experience in the planning, design, permitting, and managing of land development, infrastructure, and water resource projects.
    Land Surveying:
    Led by Carl Cook, a licensed surveyor with over 25 years experience in the industry, the JHA survey team has capabilities ranging from boundary surveys to construction layout to detailed topographic surveys.
    Environmental Services:
    JHA Environmental & JHA Remediation provide environmental remediation and site services for the planning, management, and expert implementation of assessment, remediation, monitoring, and construction projects.

    JHA's civil engineering and land surveying divisions were established in 1996 by Jeff Jacob and John Hefner. JHA expanded to California in 2006 with the opening of JHA Environmental, Inc. Expansion has continued with the addition of Environmental Services in Illinois in 2013, the opening of JHA Remediation, LLC in California in 2014, and the opening of the Atlanta, Georgia office in 2018.

  • Whom to Contact

    • David Kulczycki, P.G.
      Regional Manager- Environmental Services
      1333 Butterfield Road
      Suite 300
      Downers Grove, IL 60515
      Phone: (630) 652-4600