Leadership – Kellar Engineering

Sean Kellar, Kellar Engineering, Traffic Impact Study Kansas City

Sean Kellar, PE, PTOE

Principal Engineer

Sean has over years of Transportation/Traffic Engineering experience. Sean’s wide range of expertise includes: intersection re-design, roundabout design, traffic modeling, bike/pedestrian facilities, traffic impact studies, traffic signal warrant analysis, parking studies, access management coordination, and neighborhood collaboration. Sean’s experience in both the private and public sectors; passion for safety and excellence; and strong communication and collaboration skills bring great value to any project. Outside of work, Sean enjoys: spending time with family, friends, playing music, biking, running, hiking, and being outdoors.

Education and Certification:

Registered Professional Engineer, State of Colorado (License #38650)
Registered Professional Engineer, State of Arizona (License #45781)
Registered Professional Engineer, State of Missouri (License #2015027449)
Registered Professional Engineer, State of Kansas (License #27166)
Registered Professional Engineer, State of Wyoming (License #15954)
Registered Professional Engineer, State of Idaho (License #P-20795)
Professional Traffic Operations Engineer (PTOE) (Certificate #2647)
Bachelor of Science in Engineering , Emphasis in Civil Engineering Arizona State University, Tempe, AZ

Professional Work Experience:

Missouri Department of Transportation (MODOT), Lee’s Summit, MO
District Traffic Engineer, Kansas City District
City of Loveland, CO
Senior Civil Engineer, Transportation Development Review – Public Works
Kirkham Michael Consulting Engineers, Greeley, CO
Project Manager
Dibble and Associates Consulting Engineers, Phoenix, AZ
Project Engineer

Download Resume

I had the pleasure of working with Sean (Kellar Engineering) on the 37th Street Connector Project in Loveland, Colorado. Sean provided traffic-engineering design support to the J-U-B Engineers team, which included roundabout design and a full traffic study for the corridor. Throughout the design process, Sean was responsive, supportive, and provided common sense solutions. I would highly recommend Kellar Engineering for traffic engineering and project management.

Dan Tuttle, P.E.

Project Manager | J-U-B Engineers, Inc.

After an initial drawing review for one of our church projects in Arizona, we received a comment that required us to provide a Traffic Impact Study before we would be given building approval. While the project timeframe was aggressive and needed to be re-submitted as soon as possible, we quickly searched for an engineer who could help us out.
Sean Kellar was one of the engineers contacted, and he turned out to be a truly remarkable find. His quick response and knowledge on the subject made for a smooth re-submittal. While traffic impact studies can often become long and costly tasks, Sean informed us about alternative options that we may look to explore before going down the route of performing a full study. From Sean’s recommendation, we decided to provide a Traffic Impact Statement instead, which led the client to save a substantial portion on time and fees in doing so.
Sean’s honest character, knowledge and efficiency in his area of work is invaluable and I look forward to using his services for any future needs.

Matt Ihms

Owner | Another Look, LLC

I’ve had the pleasure of working with Sean Kellar at Kellar Engineering on several projects. He is easy to work with, extremely responsive, follows through on his commitments, and is an excellent traffic engineer. I enjoy working with him and wouldn’t hesitate to recommend him for all of your traffic engineering needs including roundabout design.

Sam Eliason, PE, LEED AP

UNITED CIVIL DESIGN GROUP, LLC

We have been very impressed in working with Sean over the past decade. He had a very common sense approach through his work at the City of Loveland. The insight and responsiveness that Kellar Engineering contributes adds significant value to our projects.

Alex Hoime, PE

Director | Tait & Associates, Inc.

Sean has been a very professional and helpful engineer to work with, both as a City engineer and as a consultant. Sean is committed to great customer service and completes high quality work. I highly recommend him for your transportation needs.

Cody Geisendorfer, PE

Owner/Project Manager | Quality Engineering, LLC

I’ve recently had the opportunity to work with Sean on a subdivision. Not only was Sean incredibly knowledgeable about the City’s traffic requirements and code for our project, but he was also able to maintain our tight submittal schedule by providing accurate Traffic Study documents on time that the City was able to approve with their first review. Sean understands the importance of maintaining entitlement schedule as it relates to the overall success of a development project.

Mark Morrison

Project Manager | Schuman Companies, Inc

Sean and Kellar Engineering are a great asset to any development team. They are efficient and professional in coordinating the many technical submittals and reports, and also willing to work through the small intricacies and conflicts encountered to provide the best product and value to the end client.

Paul McMahon

Valerian LLC

Sean is not only an excellent traffic engineer but also extremely personable and great to work with.

Former District Engineer | MODOT

I’ve had the opportunity to work with Sean over several years and found him thorough and fair handed. He welcomed innovation while being sensitive to needs of all stakeholders. I know Sean to be virtuous man and respectable engineer.

Tracy J. Letzring

Director, Environmental and Engineering | Crop Production Services

Sean is a dependable and reliable traffic engineer. He has met our project deadlines and has had good relationships with municipalities in northern Colorado while working on our projects. AGPROfessionals would recommend Kellar Engineering for traffic impact studies and traffic engineering services.

Tim Naylor

AGPROfessionals

I have had the opportunity and pleasure to work with Sean on several projects in the City of Loveland, Colorado. His transportation experience, engineering judgment and commitment to professionalism really shows in the outstanding quality of his work. I consider Sean to be my most reliable Go-To engineer for excellent advice and thoughtful opinions.

Civil Engineer

City of Loveland

I’ve worked with Sean for a number of years and find him to be very knowledgeable and efficient. He provides solid work at a fair price. Sean has a valuable knowledge of the development review process which is helpful in keeping projects moving forward. I definitely recommend using Kellar Engineering for Traffic Impact Studies.

Troy Peterson

Flagstone Partners

Working with Sean has been a wonderful experience! He is a progressive thinker and has great ideas. I highly recommend Sean to anyone needing a traffic engineer!

Vernon H. Koch

Former Traffic Operations Supervisor | MODOT

TTLC would like to thank Kellar Engineering for your dedication and hard work regarding the traffic planning on Lee Farm project in Loveland. Your expertise, professionalism and knowledge have been instrumental for the submittal of our 750+ lot master planned development. Furthermore, your knowledge, teamwork and guidance has saved us time and money as evident in the zero comments received on our submittal. Thank you for your dedication on this project.

Katie Cooley

Development Director, Project Manager | The True Life Companies

Sean Kellar, PE, PTOE

Principal Engineer

Education and Certification:

Registered Professional Engineer, State of Colorado (License #38650)

Registered Professional Engineer, State of Arizona (License #45781)

Registered Professional Engineer, State of Missouri (License #2015027449)

Registered Professional Engineer, State of Kansas (License #27166)

Registered Professional Engineer, State of Wyoming (License #15954)

Registered Professional Engineer, State of Idaho (License #P-20795)

Professional Traffic Operations Engineer (PTOE) (Certificate #2647)

Bachelor of Science in Engineering , Emphasis in Civil Engineering Arizona State University, Tempe, AZ

Professional Work Experience:

Missouri Department of Transportation (MODOT), Lee’s Summit, MO District Traffic Engineer, Kansas City District

City of Loveland, CO Senior Civil Engineer, Transportation Development Review – Public Works

Kirkham Michael Consulting Engineers, Greeley, CO Project Manager

Dibble and Associates Consulting Engineers, Phoenix, AZ Project Engineer

Missouri Department of Transportation (MODOT), Lee’s Summit, MO
District Traffic Engineer, Kansas City District

City of Loveland, CO
Senior Civil Engineer, Transportation Development Review – Public Works

Kirkham Michael Consulting Engineers, Greeley, CO
Project Manager

Dibble and Associates Consulting Engineers, Phoenix, AZ
Project Engineer