TRANSPORTATION ENGINEERING

PLANNING + OPERATIONS + DESIGN

Regardless of where you are in the project process, our full spectrum of transportation engineering services will help deliver successful results. From planning to operational analysis to design, our team can help you navigate the process and find and implement the best solution for any traffic challenge. Concord excels at providing clients with creative and innovative solutions to build safe, efficient and sustainable transportation systems while more efficiently utilizing the existing infrastructure. We understand that traffic engineering challenges are dynamic and each project and client is unique. Our team of experts is ready to help.

ELECTRICAL ENGINEERING

ANALYSIS + DESIGN

The Concord team understands the importance of well designed electrical concepts and offers expertise in electrical engineering solutions, including joint use pole engineering and surveying, NECS, RESC and NEC Standards Compliance, lighting analysis and design, electric service applications and design, communications system design and 480VAC distribution design.

See our PROJECTS, research our SERVICES and meet our TEAM. You may also CONTACT US to learn more about how we can help you achieve your goals and resolve your Transportation and Electrical Engineering concerns.

Seattle Multimodal Terminal At Colman Dock

Burien NERA Redevelopment Area

Sound Transit East Link Extension E360

Tacoma Link Expansion Final Signal Design

Third Ave Bus Lane Extension Study

Center City Gateway ITS

Kirkland 100th Avenue Corridor Study

Madison Bus Rapid Transit Design

SCL Arterial Street Light Conversion Lighting Analysis

Georgetown Festival Street Project

Bellevue Way HOV Project

One Center City Mobility Plan

1109 1st Avenue, Suite 212 Seattle, WA 98101

206-682-0567Contact Us

Xiaoping and her team at Concord have been invaluable on several recent projects. Their knowledge of the industry, professionalism, and their commitment and responsiveness to their clients is outstanding. I highly recommend them and look forward to continuing to work with them in the future.

- Jim C. City of Seattle Engineer
CivilTech has worked with Concord Engineering to successfully deliver projects together to common prime consultants and public agencies. We enjoy working with the engineers at Concord, as they are responsive, knowledgeable, and able to navigate projects effectively while addressing stakeholder interests, team dynamics, and technical complexities associated with traffic and electrical engineering.

- Jill P. CivilTech Engineering, Inc.
Concord Engineering has been an outstanding and supportive teaming partner on our transit projects and traffic engineering studies. As evidenced by our success in delivering quality work to our clients, Concord has been instrumental in streamlining our projects by augmenting our staff or leading tasks independently. We fully endorse Concord for any transportation project involving traffic engineering, ITS, or transit planning elements.

- Tony L. WSP

Xiaoping Zhang

As founder and Principal Engineer, Xiaoping has over 17 years of experience leading and managing transportation planning, transportation engineering, and electrical engineering projects. As a transportation engineer, Xiaoping is specialized in multimodal corridor studies, traffic simulation modeling and traffic operations analysis. As an electrical engineer, Xiaoping has successfully delivered numerous electrical, lighting analysis and design projects over the past decade.

Xiaoping is a member of the Transportation Research Board (TRB) and serves on the TRB Highway Traffic Monitoring Committee. Xiaoping also serves on the Diversity Committee of the APWA Washington State Chapter. Xiaoping enjoys spending time with her son and husband and practicing Tai Chi in her spare time.

Education:
PhD, Civil Engineering, University of Washington
MS, Civil Engineering, University of Washington

Registrations/Certifications/Memberships:
PE, Civil, Washington
PE, Electrical, Washington
PTOE, ITE

Meagan Powers

As a Senior Engineer, Meagan has been instrumental in our success. Meagan has over 13 years of experience in planning, evaluating and designing transit and multimodal transportation projects within the greater Seattle area. She has extensive experience in evaluating transit signal priority, traffic signal coordination, and the impacts of signal and channelization improvements on transit speed and reliability through complex urban corridors. In addition to operational analysis, Meagan has led the design and implementation of ITS and signal improvements to support transit operations throughout the City of Seattle and King County.

Meagan loves to get outdoors with her family and hike, bike or run whenever she can.

Education:
BS, Civil Engineering, Montana State University
MS, Civil Engineering, Montana State University

Registrations/Certifications/Memberships:
PE, Civil, Washington
ITE
Women’s Transportation Seminar (WTS)

Mark Madden

Mark is a Senior Transportation Engineer at Concord with over 45 years of professional experience in the fields of traffic signal design and operation, traffic operations, and safety programs. Prior to working in the private sector, Mark was an engineer for King County and has spent many years as a consultant in Washington State. His knowledge of local, state and national standards ensure that projects are safe and adequately designed to meet public and agency expectations.

Mark is a licensed professional engineer in both Washington and Oregon and is a certified professional traffic operations engineer (PTOE). Mark is a member of the Institute of Transportation Engineers (ITE), and his peers voted him ITE Section President in 2004. The Washington Section ITE awarded him their Outstanding Service Award and the Western States District awarded him a Presidential Proclamation for Distinguished Service. Mark has served twice on the Washington State MUTCD (Manual on Traffic Control Devices) Adoption Committee and uses his knowledge of the MUTCD to design safe projects that are defendable in court.

Mark enjoys spending time with his family and relaxing (and working) at his family cabin in his spare time.

Education:
BS, Civil Engineering, University of Washington

Registrations/Certifications/Memberships:
PE, Civil, Washington
PTOE, ITE

Jeremy Wheeler

Jeremy is a senior engineer with extensive experience in traffic design and traffic operations analysis in multimodal environments. Jeremy’s range of design skills include traffic signal systems and signal modifications, Intelligent Transportation Systems (ITS) including fiber optic interconnect networks, illumination systems, channelization and signing, pedestrian and bicycle facilities, bicycle and vehicle detection systems and temporary traffic control. As a transportation engineer, Jeremy has led or contributed to the design of numerous traffic signal, street lighting, and multimodal improvement projects throughout Oregon and Washington.

Prior to joining Concord, Jeremy was one of the lead traffic designers for several transit projects in the Portland metro area including light rail and streetcar expansions. In addition, Jeremy has public sector experience as a project manager for the City of San Jose, working on the delivery of local and regional ITS projects. Notable projects include the delivery of a next-generation Transportation Management Center (TMC) for the City of San Jose and the development of systems engineering requirements for the integration of advanced transportation management software for San Jose’s TMC.

Jeremy is an avid sports fan, particularly of the Portland Trail Blazers, and enjoys running and hiking the Northwest’s beautiful trails, and spending time with friends and family.

Education:
BS, Civil Engineering, Portland State University

Registrations/Certifications/Memberships:
PE, Civil, Washington
PTOE

Syed Rahman

Syed is a licensed transportation engineer with over 9 years of experience in traffic signal, ITS, signing and striping design, lighting analysis and design, electrical design, traffic and transit operation analysis, and traffic simulation modeling. Syed has completed a number of signal design and roadway, intersection, and pedestrian lighting analysis and design projects in King County and the Puget Sound region. Syed also has extensive experience in construction support services, including material review, design change, and addressing RFIs. Recently Syed successfully completed the Seattle Department of Transportation (SDOT) S Michigan St ITS project and Seattle City Light (SCL) Arterial Roadway Lighting Analysis and Design projects. He is currently leading the signal modification for the Seattle Department of Transportation Madison BRT project. When not at work, Syed enjoys hiking Washington’s beautiful parklands and spending time with his family.

Education:
MS, Civil Engineering, University of Idaho
MS, Civil Engineering, BUET, Dhaka, Bangladesh
BS, Civil Engineering, BUET, Dhaka, Bangladesh

Registrations/Certifications/Memberships:
PE, Civil, Washington
EIT, Civil, Utah

Haixiao Yu

As a transportation engineer at Concord, Haixiao is experienced in traffic design and operations and in analyzing and evaluating the potential impact of proposed traffic infrastructure improvements and operational changes on future build scenarios. He is experienced with signal, electrical, ITS and lighting design and analysis, and is proficient with a variety of traffic analysis and simulation tools, including Vissim and Synchro.

Before joining Concord, Haixiao worked as a summer intern at SDOT in 2014 and assisted the SDOT signal operation engineers with signal operations and optimization projects.

Haixiao is an avid music and sports fan and enjoys basketball, soccer and football. Haixiao is a huge fan of the Seattle Seahawks and German soccer club Bayern Munich and enjoys catching a game whenever he can.

Education:
MS, Civil Engineering, University of Washington
BS, Civil Engineering, Tsinghua University

Cherie Chen

As an associate transportation engineer at Concord, Cherie has experience in traffic operations analysis, traffic data collection, signal design, and illumination analysis and design. Cherie is skilled at using Synchro, Vissim, ArcGIS, and AutoCAD to develop traffic models and deliver traffic design plans. Before joining Concord Engineering, Cherie worked as a summer intern at Transpo Group in 2015. Cherie loves reading, listening to music and watching movies.

Education:
MS, Civil Engineering, University of Washington
BS, Transportation, Shanghai Jiao Tong University

Registrations/Certifications/Memberships:
EIT, Washington

Mindy Pfeiffer

As Concord’s Business Manager, Mindy has multiple years of experience in accounting, finance, and project management. Mindy’s past work experience includes roles in a variety of industries, including Ernst & Young, Delta Airlines and Hewlett Packard. Mindy has a thorough understanding of client service and business operations. She enjoys working with people and is committed to providing our clients and employees with respect and integrity. When she isn’t working Mindy enjoys volunteering in her community and visiting with family and friends.

Education:
BS, Accounting, Santa Clara University

Registrations/Certifications/Memberships:
Certified Public Accountant, Washington

Xiaoyi Liu

Xiaoyi Liu is a traffic engineer with several years of experience in conducting traffic engineering, ITS design, transportation planning studies including traffic impact analysis, parking study, traffic simulations and traffic data analysis in the states of Washington and California. Since 2013 her work has involved various ITS design and signal design projects, as well as regional projects in both California and Washington. Xiaoyi is experienced with vehicle detection systems including video, magnetometer, bluetooth and loop-based detections in both design and data analysis.

Xiaoyi enjoys travel, listening to music in her free time, and she is an avid snowboarder!

Education:
MS, Transportation Engineering, University of Washington
BS, Transportation Engineering, Beijing Jiaotong University

Registrations/Certifications/Memberships:
PE, Civil, California
Women’s Transportation Seminar (WTS)

Valerie Lee

Valerie is a senior transportation engineer with over 26 years of experience in the state of Washington working for both the City of Seattle and WSDOT. Valerie’s expertise includes traffic study and analysis, traffic signal and ITS design, traffic signal operation and timing, new traffic signal warrant study, transit priority design and operation, streetcar signal design and operation, light rail signal design and operation, road diet programs, pedestrian and bike lane safety programs, private development programs, drainage and storm water treatment design, hydraulic analysis, roadway and channelization design.

In her free time, Valerie enjoys getting outside to hike and garden.

Education:
BS, Mechanical Engineering, Beijing Aviation University
Civil Engineering Coursework, University of Washington

Registrations/Certifications/Memberships:
PE, Civil, Washington

Debashis Saha

Debashis is a transportation engineer with experience in Intelligent Transportation Systems, Transportation Modeling and Logistics Optimization. Since joining Concord, he has been involved in several street improvement projects in downtown Seattle. Before joining Concord, Debashis worked as a graduate research assistant in the Smart City Transportation Lab at Washington State University and performed research work on Incident Response Management. He is proficient at using Vissim, Synchro, AutoCAD, AGi32, and ArcGIS.

Debashis is a sports enthusiast. He spends his spare time playing and watching soccer. He also likes travelling to new places and exploring different cultures.

Education:
MS, Civil Engineering, Washington State University
BS, Civil Engineering, BUET, Dhaka, Bangladesh

Registrations/Certifications/Memberships:
EIT, Washington

Yilin Wang

Yilin is an Assistant Engineer at Concord Engineering with experience in joint-use engineering, lighting analysis, logistics, transportation engineering and cost estimation. Her solid background in civil engineering and engineering management have enabled her to be a project lead on the SCL Joint Use utility pole engineering project.

Yilin has a strong passion for table tennis. She was the member of UW table tennis team, which won NCTTA national championship women’s team 6th place in 2012.

Education:
MS, Transportation Engineering, Cornell University
MS, Engineering Management, Cornell University
BS, Civil Engineering, University of Washington

Registrations/Certifications/Memberships:
EIT, Washington
PE, Civil, Oregon

Kevin Nguyen

Kevin is an assistant transportation engineer with experience in traffic operations analysis, street illumination analysis, and SCL Joint Use utility pole engineering. He has been instrumental in Concord’s role with the Seattle street lightning project and in using AGi32. Kevin also has experience using traffic simulation tools such as Synchro and Vissim. Prior to joining Concord, Kevin worked as an intern with SDOT in 2015 and assisted the signal operation team with signal optimization projects.

Kevin is a car enthusiast and spends his spare time working on cars, going on drives and exploring the beautiful Northwest.

Education:
BS, Civil Engineering, University of Washington

Registrations/Certifications/Memberships:
EIT, Washington

Hayden Hulbert

Hayden is an intern engineer who primarily assists our team with SpidaCalc, AutoCAD, MapSight, and fieldwork. Hayden has experience with data collection, data analysis, and design. He has been instrumental on the SCL Joint Use utility pole engineering project.

In his free time, Hayden enjoys hiking and traveling.

Education:
BS, Civil Engineering, Washington State University (expected Fall 2020)

Anita Tan

Anita is a licensed CPA who brings more than 15 years of accounting and finance experience to Concord. Prior to joining Concord, Anita held accounting roles at a variety of companies, ranging from large publicly traded companies to small businesses. Anita is a critical thinker and is key to Concord’s financial success. She is a true team player! Anita enjoys meditation and spending time with her husband and son in her spare time.

Education:
BS, Economics, Guizhou University of Finance and Economics (China)

Registrations/Certifications/Memberships:
Certified Public Accountant, Washington
Certified Public Accountant, British Columbia, Canada
Certified Public Accountant, China

Yuan Wen

As a traffic engineer, Yuan has experience in the fields of traffic and transit operational analysis, traffic simulation modeling, signal timing, traffic signal design, illumination analysis and design, ITS design, electrical design and temporary traffic control. He has performed traffic simulation modeling and operational analysis for a number of corridor improvement studies and transit operational improvement studies in Seattle. Yuan is proficient in a variety of traffic simulation and analysis tools such as Synchro, Vissim, and Visum and has experience with data analysis using statistical models.

In his free time, Yuan enjoys hiking, traveling and Chinese painting.

Education:
MS, Civil Engineering, University of Washington
BS, Transportation Engineering, Southeast University

Registrations/Certifications/Memberships:
EIT, California

Jody Guilliatt

Jody is a seasoned administrative and accounting professional, with over 10 years of industry experience working for a variety of companies and industries. In addition to her career, Jody is also a busy mom of two. She has held numerous volunteer positions throughout the years, most recently with Girl Scouts and her local school district and homeless shelter.

Nate Broughton

Nate is an electrical engineer with experience working with power and analog circuit design. Since joining Concord, he has worked closely with the power distribution team at Seattle City Light utilizing his strong electrical engineering background to assist in advancing city projects. He has experience with AutoCAD, as well as circuit design tools such as NI Multisim and Cadence Virtuoso.

Nate is a soccer enthusiast and an avid supporter of the Seattle Sounders FC, and spends much of his free time watching or playing the sport.

Education:
BS, Electrical Engineering, University of Washington

Khoi Le

After his recent graduation, Khoi completed a summer internship at the Port of Tacoma as a Maintenance Engineering Intern where he assisted in the upgrading of the rail warning lighting system from incandescent to LED. Since joining Concord, he has provided support to the power distribution team at Seattle City Light. Khoi has experience using AutoCAD, PowerWorld simulation, and Verilog language.

Outside of working hours, Khoi is very interested in Brazilian Jiu-Jitsu. He also takes interest in travel photography and is an image contributor for Shutterstock.

Education:
BS, Electrical Engineering, University of Washington Bothell
BA, Finance, Auckland University of Technology, New Zealand

Tony Woody

As Transportation Operations Manager, Tony brings over 18 years of experience in the transportation engineering and planning field to the Concord team. His experience includes traffic operational analysis, transportation planning, project management, traffic engineering, and transportation engineering education. Tony has utilized advanced traffic analysis and modeling techniques on a variety of arterial, freeway, and transit related project throughout his career.

He has extensive experience leading traffic analysis and evaluation and assisting in the design of freeway interchanges, transit systems, and advanced tolling applications using microsimulation modeling and other traffic analysis tools.

In his free time, Tony enjoys spending time outdoors and with his family. Tony also enjoys teaching and mentoring students as an adjunct instructor for the civil and environmental engineering department at the University of Washington.

Education:
MS, Civil Engineering, University of Washington
BS, Civil Engineering, Oregon State University

Registrations/Certifications/Memberships:
PE, Civil, Washington

Wei Ding

Wei is a traffic engineer with over 10 years experience in traffic design and traffic operations analysis. Wei’s design skills include traffic signal systems and signal modifications, ITS, illumination analysis & design, channelization and signing, traffic detection systems, and Maintenance of Traffic (MOT). His traffic operations experience includes traffic impact analysis, transit signal priority analysis and design, traffic safety analysis, and arterial corridor study. He is proficient with a variety of traffic analysis and simulation tools, including Synchro and Vissim.

Prior to joining Concord, Wei worked with ISL Engineering in Alberta, Canada for several projects including transportation planning, signal design, traffic operational analysis, and highway lighting design.

In his spare time, Wei enjoys travelling, reading, jogging and gardening.

Education:
PhD, Civil Engineering, Tongji University
MS, Civil Engineering, University of Waterloo

Registrations/Certifications/Memberships:
EIT, Alberta CA

Vivian Chen

Vivian is an accounting professional proficient in a variety of accounting and bookkeeping systems. She is detail oriented and well organized with strong analytical and problem-solving skills. Prior to joining the Concord team, Vivian spent many years as treasurer on the Somerset Elementary School PTSA while also serving as Chair of the Budget Committee.

In her free time, Vivian loves to travel, explore the great outdoors, and spend time with her husband, three children, and her dog Rose.

Education:
BS, Accounting, Concordia University (Canada)

Aaron King

Aaron is a transportation engineer with experience in traffic simulation modeling and operational analysis, transportation planning, highway design, and construction engineering. He is skilled in design and modeling software packages including AutoCAD, Microstation, and Synchro. Prior to joining Concord, Aaron was a highway engineer at Federal Highway Administration (CFLHD) working in various roles on roadway improvement projects across the Western US.

Aaron is an adventure seeker and outdoor enthusiast often traveling or in the mountains camping, snowboarding, running, hiking, biking, etc. He is passionate about environmental awareness and considers himself an amateur meteorologist. He also enjoys spending time with friends and family and rooting for the LA Dodgers and Denver Broncos.

Education:
BS, Civil Engineering, University of Colorado

Charissa Quiambao

Charissa Quiambao is an Office Administrator and student with experience in administration and project coordination. She has worked for various industries including Nintendo, and the Washington State Golf Association. Charissa has a certification from UW in Professional Technical Writing, and working towards a bachelors in English with a minor in Business through UMass Lowell – Online.

In her free time, Charissa enjoys hiking, backpacking/camping, going to music/theater shows, cooking, and travelling.

Steven Diebol

Steve is a senior engineer with over thirteen years of experience in the transportation engineering field. His experience includes intersection and roadway traffic modeling, capacity analyses, traffic impact studies, safety studies, traffic signal design, and roundabout analysis and design. As a project manager, Steve has helped clients obtain approvals for large development projects and has also worked with local road agency clients to design and evaluate intersection improvements.

Prior to joining Concord, Steve worked for consulting firms in Michigan and Ohio contributing to a variety projects across the Midwest. Some notable projects include a comprehensive study of the safety impacts of roundabout installations in Carmel, Indiana; research leading to a joint design guide for accommodating trucks at roundabouts for both the Minnesota and Wisconsin Departments of Transportation; and design of a unique signal system to accommodate a two-way bike facility for the city of Detroit, Michigan.

Steve enjoys spending time with his wife and triplet sons, road trips to visit major league baseball stadiums, and landscape photography adventures.

Education:
BS, Civil Engineering, Michigan State University

Registrations/Certifications/Memberships:
PE, Civil, WA No. 57409

PE, Civil, IN No. 11900053

PE, Civil, OH No. 78320

PE, Civil, MI No. 57474

PTOE, No. 2950

TRANSPORTATION ENGINEERING

OUR SERVICES

PLANNING

OPERATIONS

DESIGN

PROJECTS