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


    Mike Cegielski joined the HBK team after serving three tours in Afghanistan. He has had extensive work internationally – in military, humanitarian, and commercial operations. Mike graduate from the USAF Academy with his BS in Astronautical Engineering. When he returned home from his tours in Afghanistan, HBK hired him as a project manager – first with the Chicago City Locator contract and then with Com Ed transmission projects. He has achieved many successes in implementing new technology in the construction sector, including helicopter-based construction operations and mid-structure lattice tower lifts – both have resulted in major cost savings and simplification of construction operations.


    Claressa has been with HBK since February, 2014, bringing over 8 years of customer service experience to HBK’s growing team. Most recently, Claressa has begun to work with HBK’s office of General Counsel on providing coordination and administrative support for the management of law related services, processes and the company’s contracts administration function. Additionally, Claressa is responsible for the management of the day-to-day operations of HBK’s Oak Brook facility, which supports over 100 HBK staff members, and she supports the efforts of HBK’s Quality and Safety Management Teams for the entire organization, assisting with coordinating training, tracking and interfacing with providers and employees to solve any open concerns. Claressa focuses on positive impactful client and contractor interactions, realizing the value these relationships have for the company. Claressa always maintains a strong focus, strives to implement best business practices, reduce operating costs and increase the productivity of HBK’s team.