Slide

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.

View Our Services

Slide

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.

Slide

A TRUSTED PROJECT PARTNER

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

View Our Services

Slide

CREATING LIVABLE COMMUNITIES

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

Slide

BUILD YOUR CAREER

We lay the foundation you need to do your best work.

See Our Benefits

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.

Slide

Aviation

Slide

BUILDINGS & FACILITIES

Slide

Rail

Slide

Transit

Slide

Transportation

Slide

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

square shape 1 1

CDWM Garfield Ridge Sewer Improvement

CDWM Garfield Ridge Sewer Improvement

square shape 1 1

CDWM Private Drain Repair Program

file3 3

PBC (CPS) Rickover Military High School Renovation

square shape 1 1

CDWM NW Highway Sewer Improvement

CTA RPM Phase One Owner's Representative Services

square shape 1 1

CDA O’Hare 21 Lower Level Utility Pavement

CDA O’Hare 21 Lower Level Utility Pavement

square shape 1 1

Metra Fiber Optic Cable Installation

NICTD Double Track NWI

square shape 1 1

CDA O’Hare 21 Elevated Parking Structure

IDOT I-55 Phase III Smart Overlay

square shape 1 1

IDOT I-55 Phase III Smart Overlay

CTA 95th St. Terminal Improvement

square shape 1 1

Metra UP Existing Sanding Upgrade

Metra UP Existing Sanding Upgrade

square shape 1 1

JOIN AN AWARD-WINNING WORKPLACE

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.