For more than 40 years, Hayduk Engineering, LLC (HELLC) has been at the forefront of designing and supporting the infrastructure that keeps Long Island’s roadways, communities, and construction partners moving forward. Based in Ronkonkoma, HELLC is a multidisciplinary civil engineering firm specializing in site and civil design, roadway and transportation engineering, water and wastewater systems, and full-service construction administration.
What sets Hayduk Engineering apart is its blend of technical depth and contractor focused service. HELLC’s team—now more than 50 engineers, technologists, inspectors, and administrative professionals—has decades of hands-on experience supporting contractors through every stage of complex public and private projects. The firm’s reputation is built on responsiveness, practical field insight, and designs that work in real world construction conditions.
Hayduk Engineering has played a key role in many of the region’s most demanding and impactful infrastructure initiatives, including: SCDPW Central Brookhaven Sewer District, Town of Brookhaven Neighborhood Road Redevelopment, Battery Park City Authority Northwest Resiliency Project, Champlain Hudson Power Express, Newark AirTrain, LaGuardia Airport Ground Access Program, and the Niagara Frontier Transportation Authority Amherst-Buffalo Light Rail Extension.
Hayduk Engineering has also had key roles in many Design-Build projects including NYSDOT Van Wyck Expressway /JFK Airport Access Improvements, LIRR Expansion, Randall’s Island Ramps, and Grand Central Station Circulation Improvements.
HELLC thrives on solving unique engineering challenges—often under tight timelines, active traffic conditions, or complex utility and permitting constraints. This problem solving spirit has made the firm a trusted partner for contractors who need reliable engineering that anticipates—and adapts to—the realities of the job site.
Over the past decade, Hayduk Engineering has experienced consistent growth, with revenue increasing by more than 150% in just the past five years. Along the way, the firm has earned numerous honors, including: LIBN Best Places to Work (2020–2025), LIBN Reader Rankings Best Engineering Firm (2020–2025), ENR NY/NJ Top 100 Design Firms (2020–2024), ENR East Top Design Firms (2025), and Zweig Group Hot Firms (2022–2024).
Project-specific awards from ASCE, ACEC, NYSSPE, LIBN, and others further demonstrate their commitment to excellence.
As Long Island continues to expand, redevelop, and modernize its infrastructure, Hayduk Engineering remains focused on the same mission that has guided them for four decades: delivering high-quality, cost-effective engineering solutions with the communication, collaboration, and reliability that contractors depend on.