Dawn Cartier, PE, PTOE, CivTech’s Founder, President, and Principal, is not just an expert in traffic and transportation engineering but also a key influencer in policy development. Her 28 years of planning, analysis, and design experience, including master transportation plans, traffic impact analyses, capacity analyses, parking analyses, and considerations, corridor studies, access management plans, feasibility reviews, alternatives analyses, and cost estimation, as well as gathering and facilitating public input, make her a trusted expert in the field. Dawn is actively involved in policy development related to access management, transportation impact fee structures, economic and contingency analysis, and neighborhood design policies throughout Arizona. Her understanding of these land use regulations and land use impacts on transportation infrastructure allows her to work seamlessly between economic development, zoning, transit, engineering, and development review departments to bring projects to fruition.

Sean Messner, PE, is a seasoned civil engineer and project manager with 20 years of experience specializing in traffic engineering design, analysis, operations, signing/marking, illumination, and ITS maintenance. He has led multiple ITS planning and design projects and has been involved with more than 20 ITS projects throughout his career. He has worked on transportation projects with many local agencies and jurisdictions in the greater Phoenix area, the counties of Maricopa, Pinal, and Pima; ADOT; and Metropolitan Planning Organizations, including MAG, PAG, and Sun Corridor MPO. Sean is well-versed in long- and short-term transportation planning and performing plan reviews and has led successful funding efforts for local agencies. Further, Sean’s proficiency in MicroStation, TransCAD, Aimsun, AutoCAD, AutoTurn, SignCAD, Visual, AGi32, VISUM, Traffix, Highway Capacity Software, and Synchro make him a valuable project resource. Now housed in CivTech’s Spokane Valley, Washington office, Sean divides his time working on projects in the Northwest and Arizona.

A seasoned Civil Engineer, Mick Mathieu, PE has over 40 years of experience managing traffic engineering, roadway and airport design and construction, and construction administration/quality assurance and design-build projects for various clients, including the Cities of Tucson, Nogales, Sierra Vista, Casa Grande and Yuma; the Town of Marana; Pinal, Pima, Santa Cruz, Cochise, Maricopa and Yuma counties; and the Arizona Department of Transportation, Maricopa Department of Transportation as well as the Texas Department of Transportation. Mick’s design expertise includes horizontal and vertical design, geometric layout, pavement design, traffic signal design, pavement marking, signing design, earthwork and plan quantities, take-off construction phasing plans, cost estimates, Special Provisions, Traffic Engineering Reports, Traffic Impact Analysis Reports, coordination with project stakeholders and subconsultants, and quality control of design plans.

Larry Wiele, PE, is an accomplished civil engineer and serves as CivTech’s Director of Design and a Senior Transportation Engineer. He has 33 years of professional engineering experience on various complex projects, including preliminary and final designs for major highway improvements, local street improvements, recreational trail design, ADA improvements, drainage design, flood protection projects, sanitary sewer design, and site development work. Larry has also completed NEPA environmental documents, location studies, and various traffic studies, including traffic impact analysis, Safe Routes to School studies, and Roadway Safety Audits. He has extensively demonstrated success in engineering, design, and total operational management for world-class heavy civil and petroleum engineering projects. Larry is actively involved in client relationships and marketing to our current and new clients, including preparing proposals and interview presentations.

David is a Senior Traffic Engineer with over 40 years of experience in traffic engineering and transportation planning with the Arizona Department of Transportation (ADOT) and CivTech, working with both municipalities and private sector specialists. David led the Traffic Design, Traffic Studies, HSIP, and Crash Records sections during his tenure with ADOT. He has continued his career at CivTech, performing and overseeing Traffic Impact Studies, Road Safety Assessments, project scoping reports, and other safety analyses. David’s experience includes performing and overseeing numerous crash analyses, warrant studies, speed studies, operational studies, no-passing zone studies, and data collection efforts.

Joe Spadafino, PE, PTOE, PTP, is a Senior Traffic Engineer who has been involved in various aspects of transportation engineering since 1978. He has experience in the production and quality control of a wide variety of traffic engineering functions: signal warrant, impact analysis, AutoTurn vehicle turning radius analysis, crash analysis and safety improvement studies, parking needs, shared parking, impact fee analysis, trip generation, circulation studies for parking lots as well as large master planned communities, creating and reviewing conceptual intersection design, signing and striping, “as-built” plans of constructed traffic signals, shop-drawing review, serving as technical advisor in regards to access control, circulation, transportation planning, and design efforts, etc. His planning experience has been primarily concentrated on master circulation studies, traffic impact analysis, capacity analysis, corridor studies, change of access reports, safety studies, traffic signal warrant studies, left turn phasing studies, and parking studies.

Benjamin Good is a Senior Traffic Engineer with 25 years of experience in traffic engineering and transportation planning. He has been involved in the traffic and transportation elements of projects for the public and private sectors. His responsibilities have included traffic control design, signing and pavement marking design, roadway lighting and traffic signal design, ITS, noise mitigation analysis, utility coordination, and traffic studies. He has significant experience with many transportation software packages, including Traffix, HCS, Synchro/SIMTraffic, Cala/PRO, Visual, and Stamina/Optima, the FHWA TNM, as well as MicroStation and AutoCAD.

Allison Shinn Hill is a Senior Transportation Planner with eight years of public and private sector experience. Her experience includes a variety of transportation projects, including environmental planning, safety planning, transit planning, and multi-modal planning. Allison’s transit and multimodal planning experience includes long-range/short-range transit plans, transit master plans, community transit plans, mobility studies, wayfinding projects, feasibility studies, and corridor projects. Her multi-modal projects have included studies evaluating bike and pedestrian networks, including gap analysis, evaluation of existing conditions, recommendations, project prioritization, and planning level cost estimates. Allison’s vast experience includes safety studies, including roadway safety assessment (RSA), safe routes to school study, citywide safety evaluations, and speed management study. Allison has extensive knowledge and a strong background in ArcGIS, including performing analyses and creating maps. Her environmental planning experience includes Alternative Selection Reports (ASR), Environmental Impact Statements (EIS), Environmental Assessments (EA), and Categorical Exclusions (CE). Allison also has experience in environmental analysis, including environmental justice/Title IV, land use, land ownership, and section 4(f).

Ruth Gutierrez is CivTech’s Senior Transportation Analyst and Transportation Modeler. In Ruth’s 19 years at CivTech, she has secured a depth of knowledge and skill across multiple aspects of traffic and transportation planning, transportation operations, public participation, and broad coordination with numerous municipalities, and public interests. She is familiar with tasks such as collecting data, utilizing intensive Excel spreadsheets to collect data within study areas, creating transportation models using TransCAD, TransModeler, Synchro, Aimsun, and SIMtraffic, calculating future volumes using regional travel demand models and proposed site traffic, calculating intersection turn movements, determining roadway classification, and determining future lane geometry in projects. Ruth’s expertise and experience ensure the continuous quality of her project tasks and study outcomes, making her an asset to every project she is involved with.

William Selby, PE, earned his Bachelor of Science in Civil Engineering from Arizona State University. Bill has experience in traffic and transportation projects and is extremely proficient in multiple traffic analysis programs, including Traffix and Synchro/SimTraffic. Bill has quickly stepped into a mentorship role for CivTech’s EITs. Before joining CivTech, Bill served five years in the United States Marine Corps, earning the rank of Corporal.

Andie Atondo, EIT is a Traffic Engineering Technician and Transportation Analyst with nearly five years of experience supporting planning and traffic engineering projects for public agencies and private clients. She has prepared traffic impact analyses and traffic statements and evaluated corridor and street networks for large area plans for multiple clients. Andie’s work responsibilities include various services, including research and data collection, transportation data analysis, traffic engineering analysis, and formulating project recommendations. Andie is experienced with AutoCAD, Traffix, Highway Capacity Software, Synchro, and SimTraffic.

Greg Witte is responsible for managing and growing CivTech’s Dallas-Fort Worth office. He also supports the firm’s projects in the DFW area and attends and participates in client-facing activities, including project meetings and public presentations/hearings. Greg is recognized as a subject matter expert and a respected leader in the construction field. Further, Greg is an accomplished and experienced senior project manager, civil engineer, and estimator with over 25 years of experience. He has extensively demonstrated success in engineering, design, and total operational management for world-class heavy civil and petroleum engineering projects.

Adam Carreon PE, PTOE, joined CivTech as a Senior Traffic Engineer after a long tenure with the Arizona Department of Transportation (ADOT). A dedicated civil engineer and safety professional, Adam has over 20 years of experience in traffic engineering. He has vast experience serving various traffic control and engineering capacities for important, high-profile safety initiatives and projects. Adam performs and oversees Traffic Impact Studies, Road Safety Assessments, project scoping reports, and other safety and operational analyses. He is well-familiar with local and federal funding avenues.

Alexandra Garner, CPSM, is CivTech’s Marketing Director. With 23 years of experience in the A/E/C industry, she is recognized as ambitious and challenge oriented. Alexandra guides CivTech’s project manager in developing thorough project submittals and marketing collateral. Stemming from her desire to ensure that physiological and psychological human concerns receive proper consideration in the design and development of projects, Alexandra is currently pursuing her Master of Science degree in Human Factors at Embry-Riddle Aeronautical University.