Though CivTech staff all exhibit the fundamental skills/characteristics—integrity, effective communication skills, enthusiasm, flexibility, technical knowledge, problem solving skills—that we believe are essential to providing a service and delivering a product that exceeds each Client’s expectations, CivTech also seeks out differences in perspective and skills. These different skills and perspectives that CivTech cultivates in each individual is one thing that helps set us apart from our competitors. This unique management philosophy allows us to provide our Clients with innovative approaches to, and creative solutions for, each project. The strengths and skill sets of each individual on the project team will be utilized to efficiently complete various tasks, produce quality products and successfully complete each project. CivTech has assembled a talented team that works together as a cohesive team.


Dawn Cartier

President/Senior Traffic Engineer

Dawn Cartier, PE, PTOE is the President and Principal of CivTech and specializes in traffic and transportation engineering. She graduated from Northern Arizona University with a Bachelor of Science in Civil Engineering. She has 20 years of engineering experience, working with both municipalities and private sector specialists. Her management style assures a positive team approach that is fully committed to the successful completion of any project. Dawn has managed numerous projects in the State of Arizona; her management and design experience includes geometric design, traffic impact analysis, signal design, signing concepts, pavement marking plans, striping plans, ITS, detour design, capacity analysis, and parking studies. She has been involved with many large scale transportation planning, engineering and design projects within Arizona including parts of the regional freeway system and Valley Metro Rail. She has also been involved with the public presentations of several major projects including the Casa Grande Transit Development Study, Red Mountain Freeway, the Northwest Extension of the Light Rail, Villaggio Montana and many proposed traffic interchanges. Dawn regularly presents at council hearings on various projects completed by CivTech.

John Willett

Project Manager/Senior Traffic Engineer

John Willett, PE, PTOE, PTP is a Project Manager/Senior Traffic Engineer at CivTech. He has 28 years of traffic engineering and transportation planning experience in the State of Arizona. He has been responsible for the traffic elements of numerous public and private projects. His responsibilities have included traffic studies and traffic engineering design of signing/pavement marking, traffic control, traffic signal, traffic signal interconnect and roadway/pedestrian lighting plans. To date, John has designed over 125 traffic signals in the state of Arizona and understands all of the parameters associated with traffic signal design – establishing an electrical point of service; coordinating with utility companies to verify no conflicts with the proposed design; providing communication between traffic signals; installing internally illuminated street name signs; video detection using loops, cameras or sensors; incorporating battery back ups (uninterruptible power supply); signal timing; using LED indications; and installing emergency vehicle pre-emption. In addition to providing traffic signal design services, he has been involved with and led roadway signing, pavement marking, traffic signal interconnect, FMS, traffic control, and roadway lighting design tasks, along with a variety of traffic analyses. John has coordinated projects with City, County, and State agencies and presented projects at public hearings, planning/zoning meetings, City Council and Transportation Advisory Board meetings. He is proficient with Microstation, Highway Capacity Software, Synchro, SIMTraffic and TEAPAC.

David Duffy

Project Manager/Senior Traffic Engineer

David Duffy, PE is a Project Manager/Senior Traffic Engineer at CivTech. He has more than 37 years of engineering experience, including 22 years of traffic engineering and transportation planning experience with the Arizona Department of Transportation. The last 11 years were as the Assistant State Traffic Engineer in charge of design and studies. He was successful in reviving the signal, interstate sign rehab and HES programs by delivering more projects, more quickly and obtaining increases to the program funds in the 5-year program. David’s experience includes signing, marking, traffic control, signal, lighting and roundabout designs through the management of the Design Section. He has performed and overseen numerous accident analyses, warrant studies, speed studies, operational studies, no passing zone studies and data collection through the management of the Studies Section. David has been very adept at implementing ideas and programs. Through his experience working with ADOT, Dave is familiar with the development of construction documents for public agencies and the importance of ensuring there are not any ambiguities in the documents before advertising a project for construction. In addition to providing quality reviews of the construction documents, Dave is available to assist agencies in acquiring any Federal Funding for design or construction of traffic signals or other improvements. He is familiar with the Federal Funding options that may be available for local agencies and the requirements for submitting and obtaining Federal Funds.

Ben Good

Traffic Engineer

Ben Good, PE, PTOE is a Traffic Engineer at CivTech and has over 17 years of traffic engineering experience in the State of Arizona. His responsibilities have included traffic engineering design of signing/pavement marking, traffic control, traffic signal, traffic signal interconnect and roadway/pedestrian lighting plans. Ben has designed the traffic signal, street/pedestrian lighting and ITS for projects around the state including: Johnson Ranch Signals in Pinal County; Thomas Road Streetscape in Scottsdale; Arizona Avenue, Frye Road to Chandler Boulevard in Chandler; Dobson Road/Guadalupe Road Intersection Improvements in Mesa; Dysart Road/Thunderbird Road Intersection Improvements in El Mirage; and Grand Avenue, 83rd Avenue to 95th Avenue in Peoria. He prepared the signing/marking plans for the following projects: McQueen Road, Riggs Road to Queen Creek Road in Chandler; Canyon Trails Commercial Center in Goodyear; and Higley Road, Mews Road to Stacy Road in Gilbert. In addition to his design experience Ben has prepared numerous traffic studies for private developments as well corridor studies for local agencies, including the Yuma Road Realignment Study and MC85 Intersections Alignment Study for the Town of Buckeye. He is experienced with the Visual Lighting Analysis Software, HCS and Synchro traffic analysis softwares, the FHWA Traffic Noise Model, as well as the AutoCAD and Microstation drafting platforms.

Joseph Spadafino

Traffic Engineer

Joe Spadafino, PE, PTOE, PTP is a Senior Traffic Engineer with over 38 years of traffic engineering and transportation planning experience. His strengths are in the writing of technical reports, specifications and in conducting detailed research and analyses. Joe excels at the development of traffic impact analyses, traffic signal warrant analyses, speed studies and accident evaluations. Joe recently prepared the traffic impact studies for the Pepsi Distribution Center at NEC Florence/Chuichu Road at Peters Road, McCartney Center, Walmart Center on I-10 and Val Vista Road and Saint Anthony’s Catholic Church Expansion in Casa Grande.

Doug Ostler PE

Traffic Engineer

Doug Ostler, PE is a Traffic Engineer with over 5 years experience at CivTech in both traffic and transportation projects. Doug has prepared capacity analyses for over 60 traffic impact analyses (TIA), traffic impact statements (TIS), and trip generation statements (TGS) for a variety of clients throughout Arizona, including the traffic signal warrants for the I-10 signals. He has experience with various traffic analysis programs including Highway Capacity Software, Traffix and Synchro/SimTraffic.

Matt Wilson

Traffic Engineer

Matt Wilson, PE is a Traffic Engineer with extensive experience in public agency transportation projects. Having worked both for public agencies and their consulting partners he has provided design services, traffic studies, and construction support for traffic and roadway improvement projects. Matt focused on traffic simulation while earning a master’s degree in civil engineering and has experience with ITS and ATC technologies while working for the Oregon Department of Transportation.

Randy Overmyer

Senior Transportation Planner

Randy Overmyer is a Senior Transportation Planner dedicated transportation
planner with nearly 40 years of experience in transportation planning for municipal streets, urban arterial roads, freeways, public transit, bicycle, pedestrian, and transportation safety. He has excellent writing and presentation skills and effectively communicates complex transportation issues and concepts to the public in understandable lay language. He has successfully led development of comprehensive transportation plans at the local, regional and statewide level as well as in foreign countries, working with both professionals and citizens groups. Currently, Randy is the deputy manager on the Casa Grande Transit Development Plan.

Ruth Gutierrez

Transportation Model Specialist

Ruth Gutierrez is a Transportation Model Specialist at CivTech with 11 years of experience in the traffic engineering/ transportation planning industry preparing traffic impact studies, traffic signal warrant analyses, speed zone evaluations, parking studies, large scale transportation modeling studies, including change of access reports and travel demand modeling. She is proficient with the Synchro/SimTraffic and Highway Capacity Software programs, as well as the TransCAD modeling software and TransModeler simulation software. Ruth recently prepared the traffic impact studies for Casa Grande Commons, Valero 1668 Development, McCartney Center. She also provided the analysis for the City of Maricopa’s Maricopa Transit Feasibility Study.

Sal Pena

Senior Traffic/Transportation Designer

Sal Pena is a Senior Traffic/Transportation Designer at CivTech Inc. He has 18 years of traffic engineering and transportation experience in the State of Arizona. Sal has experience in preparing traffic signal, signing, striping, roadway lighting, landscaping, drainage, and roadway improvement plans. He has a significant amount of experience with AutoCAD an Microstation platforms.

Gerardo Perez

Traffic Designer

Gerardo “Gerry” Perez is a Traffic Designer with over 18 years of experience in traffic engineering, signing, marking, and lighting design projects (urban freeways and rural highways). Gerardo is an experienced lighting and traffic engineering designer and has worked on Happy Valley Road, Lake Pleasant Parkway, SR101L, SR51, SR202, 67th Ave Olive to Thunderbird Road, 27th Ave and Baseline Re-alignment project. Gerardo has also prepared signing, striping and traffic signal plans for local municipalities in the metro Phoenix area, His software skills include Microstation, SignCAD, AutoCAD.

Stephanie Croker

Stephanie Croker, TET received her Bachelor of Science in Civil Engineering from Northern Arizona University. Stephanie is a Traffic Engineer in Training with experience in both traffic and transportation projects. Stephanie has prepared traffic impact analyses, traffic impact statements, and trip generation statements for a variety of clients. Stephanie is experienced with AutoCAD, Traffix and Synchro/SimTraffic.

ViVi Somphon

Marketing and Business Development

ViVi Somphon is manages the Marketing and Business Development efforts at CivTech and brings over 10 years’ experience in project and business management and operations expertise. During her 13 years in the legal industry, she was involved in corporate law, real estate transactions and acquisitions, as well as corporate formations. In 2015, ViVi joined CivTech and in addition to her marketing responsibilities, she promotes and improves relationships and interactions on all levels of various departments, including client outreach, business and partner networking, client management and project coordination.

Tearsa Gardner-Forward

Accounting and Office Manager

Tearsa Gardner-Forward has many years of experience as an Office Administrator and recently joined CivTech. She is responsible for overseeing accounts payable, accounts receivable, invoicing, payroll, business licenses, health and business insurance certification, inventory supplies, human resource policies and procedures. Tearsa has direct communication with clients and public agencies in managing contracts, insurance, completing schedules, billings and applications.