Oak Brook

Located in Oak Brook, Illinois, HBK's Oak Brook office takes our utility focused service offerings to a regional client base. Our Oak Brook staff focuses on large scale utility improvements for utilities spanning multiple regions and states.

Opened in 2014, HBK's Oak Brook office houses teams dedicated to the design and construction observation of power transmission and distribution facilities, gas distribution facilities as well as providing subsurface utility engineering for large scale improvement programs.

Key utility clients serviced by HBK's Oak Brook office include Commonwealth Edison, Nicor Gas, Illinois State Toll Highway Authority, American Transmission Company and We Energies.

Key Personnel


    Heather Hollaar started with HBK in August of 2016 with 19 years’ experience in the telecommunications industry. She is currently a Designer in the Telecom sector and is responsible for creating fiber optic & conduit designs for AT&T, that supply multi-site host connections including multi-dwelling units, underground and above-ground infrastructure sites. Responsibilities include training designers, project design, and drafting.

    JAMES A. GACA, Jr.

    James Gaca joined HBK in the fall of 2013 after working in the telecommunications industry for over 25 years as a Senior Communication Service Technician (SCST). He has managed large, nationwide deployment of wireless infrastructure for Verizon, AT&T, and Sprint & US Cellular. As a telecommunications designer he is responsible for designing small cell node design for multiple wireless carriers.