Seylone is a DBE, MBE, and SBE-certified specialty construction and civil support firm operating across the Northeast and Mid-Atlantic. Our work runs through two operating groups — Seylone Construction Group covering concrete coring, structural probing, localized excavation, precision trenching, site clearing, and surface restoration, and Seylone Earth & Civil Group covering test pit excavation, subsurface utility engineering, vacuum excavation, geotechnical and environmental drilling, monitoring well installation, and limited-access interior drilling. Two integrated operating groups, one accountable team.
Our team includes licensed Professional Engineers and sustainability-certified professionals holding LEED AP, WEDG, and ENV SP credentials. We combine deep technical expertise with hands-on construction experience to deliver projects with precision, efficiency, and uncompromising attention to safety and schedule. Seylone is recognized for its ability to navigate complex site conditions, coordinate across multiple agencies, and consistently deliver high-quality results on infrastructure, transit, waterfront, historic preservation, and environmental projects.
Seylone supports the region’s most recognized public agencies and infrastructure programs — including MTA, NYCEDC, NYC DDC, NYC DEP, and the Port Authority of New York and New Jersey — alongside private-sector primes and engineering partners across the Northeast. Our clients trust Seylone to mobilize fast, execute safely, and deliver consistent quality across every engagement, from a single test pit to multi-phase investigation programs spanning months.
Seylone delivers on the full spectrum of infrastructure, civil, and private-sector work across the Northeast and Mid-Atlantic — from complex single-site investigations to multi-year capital construction programs.
Seylone operates through two focused divisions, each with dedicated crews and equipment. Projects that require both scopes are coordinated under a single point of accountability.
Construction-side field services delivered at prime-contractor standard.
Subsurface investigation, test pits, SUE, and specialty drilling programs.
Every capability we market is delivered by Seylone personnel, on Seylone equipment — not brokered, not subcontracted. That’s how we hold the schedule, the safety record, and the quality.
From business certifications and municipal licenses to professional credentials and insurance — Seylone carries the full stack of documentation primes and agencies require.
From single test pits to multi-phase infrastructure programs — Seylone delivers the field execution, documentation, and technical depth that primes and agencies require. Tell us about your project.
