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Absolutely Essential

Named for the Latin phrase “sine qua non,” referring to something considered absolutely essential, SQN Associates aims to be “absolutely essential” to the success of our clients, partners, employees, and community.

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Culture of Excellence

Our brand of excellence encompasses more than project metrics. We strive to stay true to our core values with every decision we make, at every level.

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A Trusted Project Partner

We manage the entire program and construction process for clients and provide comprehensive reporting on all facets.

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Creating Livable Communities

SQN partners with public and private clients to promote a sustainable future.

About SQN

SQN Associates, LLC (SQN) is a recognized leader in providing Construction Management, Program and Project Management, and Project Controls services. Our team applies their knowledge and experience in engineering and construction to the everyday challenges that occur throughout the construction process.

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Aviation

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BUILDINGS & FACILITIES

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Rail

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Transit

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Transportation

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UTILITIES

Our services

Construction Management

Program &
Project Management

Project Controls

Featured Projects

IDOT Various Phase III Pavement & Bridge Preservation Inspection

IDOT Various Phase III Pavement & Bridge Preservation Inspection

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CDWM Garfield Ridge Sewer Improvement

CDWM Garfield Ridge Sewer Improvement

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CDWM Private Drain Repair Program

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PBC (CPS) Rickover Military High School Renovation

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CDWM NW Highway Sewer Improvement

CTA RPM Phase One Owner's Representative Services

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CDA O’Hare 21 Lower Level Utility Pavement

CDA O’Hare 21 Lower Level Utility Pavement

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Metra Fiber Optic Cable Installation

NICTD Double Track NWI

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CDA O’Hare 21 Elevated Parking Structure

IDOT I-55 Phase III Smart Overlay

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IDOT I-55 Phase III Smart Overlay

CTA 95th St. Terminal Improvement

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Metra UP Existing Sanding Upgrade

Metra UP Existing Sanding Upgrade

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Join An Award-Winning Team

Whether you’re looking for the next challenge to conquer or are just getting started, we’d love to help you build your career at SQN.