About Us

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    Founded with a focus on client services

    Robb Dibble started Dibble Engineers in 2001 to maintain a stronger connection with clients, and prioritize hands-on project management and tailored solutions. Today, DEI includes a dynamic staff with expertise in structural design and consulting for nearly any engineering challenge. Our most important assets remain the relationships we have formed with owners, architects and building professionals.

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    Structuring solutions for today’s challenges

    DEI is committed to the process. We help all types of clients by not only having a solution to their problem, but also helping them discover what to address. DEI’s approach is tailored to the challenge, but is always founded on the same principles: Define the problem, investigate the cause, and communicate the results in a manner that everyone can understand. DEI’s constant goal is to structure solutions that offer enduring results.

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    A strong foundation

    The strength of DEI’s team is the secret of our success. Under the leadership of founder Robb Dibble, DEI’s collaborative professionals are empowered to do whatever it takes to ensure clients are satisfied with our work. Together, we are trusted technical advisors who take pride in creating sound solutions for uncommon challenges.

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Small Firm, Big Reach

Based in Kirkland, WA on the east side of Lake Washington. We are licensed throughout the Western US.


  • Robb Dibble

    Robb Dibble


    As the founder of Dibble Engineers, Robb is dedicated to encouraging the DEI team to engage, respond, and create lasting relationships with clients, while providing superior structural engineering services. Robb’s career has included a variety of civic, commercial, and residential projects. He is an expert in building assessment and construction defect repairs, and often serves as an expert witness to settle litigation related to structural damage. Robb enjoys spending quality time with his wife, son, and golden retriever named Boulder at the family cabin on Lake Cavanaugh. He also enjoys golfing in Arizona, and investing in local real estate. Outside the office, Robb serves as a frequent volunteer and committee member for the Bear Creek School, as well as the Lake Washington School District’s EMTAC committee. He also sits on the board of several local businesses and professional organizations.


    425.828.4200 Ext. 222

    Robb Dibble, PE Principal
  • Beth Jensen

    Beth Jensen

    Senior Associate

    With over 30 years of structural engineering experience, Beth is an expert at coordinating the needs of multiple disciplines to create unique solutions for a variety of project types. She has two adopted cats who both tip the scales at about 20 pounds. When she is not working you can find Beth outside gardening, or helping others design their landscaping.


    425.828.4200 Ext. 228

    Beth Jensen, PE SE Senior Associate
  • Caitlin Wilhelm

    Caitlin Wilhelm

    Project Engineer

    Caitlin recently joined the DEI team with three years of experience in structural design of retail, industrial, and essential facility buildings. She spends most of her spare time with her husband and young daughter, but she occasionally has time to cook, sew, and craft. caitlin@dibbleengineers.com 425.828.4200 Ext. 244
    Caitlin Wilhelm, Project Engineer
  • Carson Zednick

    Design Engineer

    Carson joined the DEI team in 2017 with 3 years of structural engineering experience focusing in residential new design, shoring design, and detention vault design. He is a Washington State University graduate and enjoys fishing, hunting and spending time with his family while exploring the Pacific Northwest.  As a passionate baseball fan, Carson has season tickets to the Seattle Mariners. carson@dibbleengineers.com 425.828.4200 Ext. 247
    Carson Zednick EIT, Design Engineer
  • Jessica web

    Jessica Lim

    Project Engineer

    Jessica joined the DEI team in 2016. Considering impacts on the environment and people, she is driven to create structures that will be more sustainable with efficient use of materials and space. Her favorite art medium is throwing pottery. She loves the sun and hopes to experience every national park - but in the meantime explores and appreciates all the wonders the Pacific Northwest has to offer.


    425.828.4200 Ext. 241

    Jessica Lim, EIT Project Engineer
  • John Mayfield

    John Mayfield

    Project Manager

    John’s project work centers on repairs, residential remodels, tenant improvements, and small-scale commercial construction. His responsiveness and efficient solutions help keep his projects on track and clients happy. Outside the office, John likes cooking, and specializes in breakfast and dessert. He also enjoys rock climbing.


    425.828.4200 Ext. 226

    John Mayfield PE, Project Manager
  • Jorden Cox

    Design Engineer

    Jorden’s engineering background includes 2 years of residential and light commercial design work. He also has valuable field experience that includes being up in the sky as a bridge inspector for the State of Washington and down in the ground as a heading engineer for the Seattle Light-Rail Tunnel. As a University of Washington graduate, Jorden is familiar with the pacific northwest and the various engineering challenges it possesses.  In his spare time, He tries to remain active by working out and playing basketball with friends. jorden@dibbleengineers.com 425.828.4200 Ext. 246
    Jorden Cox, EIT Design Engineer
  • Joyce Bass

    Joyce Bass

    Administrative Assistant

    Joyce has enjoyed working as an administrative professional for her entire career. She joined the DEI team in 2015 as a transplant from the beautiful island of Hawaii. On weekends she travels the state in search of Bigfoot, and pursues her passion for road tripping.


    425.828.4200 Ext. 221

    Joyce Bass, Administrative Assistant
  • Juleen Rogness

    Juleen Rogness


    Juleen’s expertise in building construction extends to project negotiations, project management, design, and structural repair for multi-family and commercial projects. Juleen and her family love to fish for salmon in Alaska, and walleye in Eastern Washington. She also likes to spend time waterskiing on the lake.


    425.828.4200 Ext. 223

    Juleen Rogness, PE SE Associate
  • Justin Wang

    Justin Wang

    Project Engineer

    Justin recently joined DEI, bringing expertise in residential and small-scale commercial remodels, and seismic support systems for electrical raceways and mechanical equipment. Justin comes from a family of engineers, with three engineer brothers and an engineer father. Justin has literally had lightning strike twice: growing up in Indiana, he lived in two different houses that were both struck by lightning!


    425.828.4200 Ext. 237

    Justin Wang, EIT Project Engineer
  • Kathryn web2

    Kathryn Wheeler

    Accounting Manager

    Kathryn recently joined the DEI team with 9 years of accounting and finance experience.  When she is not nurturing her love of Excel, she spends time with her husband, son and corgi.  She enjoys gardening, knitting and cooking in her spare time.


    425.828.4200 Ext. 242

    Kathryn Wheeler, Accounting Manager
  • Kyle Umlauf

    Kyle Umlauf

    Project Engineer

    As a college student, Kyle earned the Dibble Engineering Furthering Education Scholarship and completed his master’s degree in civil engineering, and joined the firm first as an intern, then full time upon graduation. He’s father to a new puppy, and has played hockey since third grade.


    425.828.4200 Ext. 230

    Kyle Umlauf, EIT Project Engineer
  • Margaret Litzinger

    Margaret Litzinger

    Senior CAD Designer

    Prior to pursuing a career in graphic design, Margaret spent over 20 years in the customer service industry, where she discovered her passion for design, and honed her skills for five years. She joined DEI in 2008 after graduating from the Architectural Graphics program at Lake Washington Technical College. In her free time she enjoys traveling, bike riding, photography, golf and painting.


    425.828.4200 Ext. 235

    Margaret Litzinger, Senior CAD Designer
  • Melissa White

    Melissa White

    Senior Project Manager

    Melissa takes a practical approach to structural engineering design, focusing on thorough responsiveness to client needs for residential-scale buildings. She has a dog called Ollie, named after the famous orphan Oliver Twist. By the time he was one, Ollie had already had four homes before he found Melissa. melissa@dibbleengineers.com 425.828.4200 Ext. 238
    Melissa White, PE Senior Project Manager
  • Michael McCann

    Michael McCann

    Project Manager

    A Vietnam-era disabled veteran, Mike has served the Puget Sound region as an engineer for over 35 years, bringing expertise in all types of structures, from high rises to single beams, as well as structural damage inspections. He enjoys sharing his structural expertise on the website Eng-Tips.com, where he discusses challenging engineering problems with other engineers worldwide. Mike and his wife love sailing, skiing, and hiking. They have a cat named “Oh No”, for good reason.


    425.828.4200 Ext. 231

    Michael McCann, PE SE Project Manager
  • Sarah Schoentrup

    Sarah Schoentrup

    Senior Project Manager

    Sarah has a strong knowledge base in buildings of all sizes, as well as a variety of construction techniques, used in various settings along the west coast. Her friendly and open communication style helps keep the design team in sync, and ensures clients are informed. In her free time, Sarah loves travel, hiking and exploring the Pacific Northwest with her husband, their young daughter and two dogs. If she wasn’t an engineer, Sarah would be working at Disneyland!


    425.828.4200 Ext. 225

    Sarah Schoentrup, PE Senior Project Manager
  • Sher Rector

    Sher Rector

    A/R Accountant

    Sher has worked in the DEI accounting department since 2011, and holds a BA in Business Administration. She brings a wealth of knowledge in accounts receivable and payable from her experience in a variety of industries. A former Hawaii resident, Sher loves scuba diving. She enjoyed having a Sargassum Frogfish as a pet, discovered when picking up trash in the Maui Ocean. Here on the mainland, she spends time with her grandchildren and in her garden.


    425.828.4200 Ext. 243

    Sher Rector, A/R Accountant
  • Stephanie Tanner

    Stephanie Tanner

    CAD Designer

    Stephanie’s background in both structural and architectural drafting give her a unique perspective on commercial and residential projects. She has two sweet calico cats that are eager to assist with the many knitting or crochet projects that are always in hand for a moment of fun and relaxing.


    425.828.4200 Ext. 240

    Stephanie Tanner, CAD Designer
  • Tami Ellis

    Tami Ellis

    CAD Designer

    Tami is a Seattle native who joined DEI in 2015. She offers over 18 years of drafting and design experience in a variety of disciplines. Tami enjoys participating in running events such as Hood to Coast, Bloomsday, the Seattle Half-Marathon, and Northwest Trail Runs. She also enjoys sailing up to the San Juan Islands and Canada during her time off.


    425.828.4200 Ext. 234

    Tami Ellis, CAD Designer
  • Timothy Pettit

    Timothy Pettit

    CAD Design Manager

    Tim has served as the CAD and IT Manager since 2006, and is a master at many CAD platforms. He leads the drafting team with a focus on efficiency and standards within the fast-paced engineering environment. Prior to joining DEI, Tim served in the Marine Corps for over six years. These days, he enjoys hanging out with his beautiful wife and two adorable daughters.


    425.828.4200 Ext. 232

    Timothy Pettit, CAD Design Manager
  • Tina Tyler

    Tina Tyler

    Senior CAD Designer

    As a drafter with over 25 years of experience, Tina offers a strong background in structural design. Locally born and raised, Tina joined DEI in 2011 with an AA in Construction Technologies from North Seattle Community College. She enjoys spending time with her husband Dave and three daughters, as well as cooking and entertaining.


    425.828.4200 Ext. 233

    Tina Tyler, Senior CAD Designer
  • Travis Colliander

    Travis Colliander


    Travis has over 17 years of experience as a structural engineer in the Pacific Northwest. As a manager at DEI, he provides the technical analysis, personal project management, and construction oversight needed to realize a successful project. Travis learned to ski in his driveway at the age of three in his hometown of Spokane. He moved to Seattle area over 20 years ago, and enjoys spending as much time as possible on the slopes.


    425.828.4200 Ext. 224

    Travis Colliander, PE SE Associate
  • Tyler Buys

    Design Engineer

    Tyler joined DEI in October of 2017. He came to Dibble Engineers with 5 years of engineering experience. He has spent the last 2 years primarily in commercial and retail design, which included the design of new ground up construction as well as extensive tenant improvement projects. Tyler enjoys spending his spare time with his wife and son, with family and friends, or on various woodworking projects. tyler@dibbleengineers.com 425.828.4200 Ext. 239
    Tyler Buys, EIT Design Engineer
  • Vivian Champion

    Vivian Champion

    Operations & HR Manager

    Vivian joined DEI from the specialty retail industry, bringing with her six years of operations and human resources management experience. She and her husband spend most of their time in the kitchen and secretly hope to have their own food business someday. She has a neurotic dachshund named Peanut, who is still super cute at 14 years old.


    425.828.4200 Ext. 229

    Vivian Champion, Operations & HR Manager

Learn more about what it’s like to work at Dibble Engineers

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Our priority is your success

DEI is totally dedicated to quality work. We create cost-effective designs that stand the test of time. Our high degree of integrity allows us to offer full-spectrum engineering expertise and advice, simply explained. We are proud to serve as trusted advisors for a variety of client types.

Whatever it takes, we make it happen

We are full-service structural engineers, creating solutions for today’s challenges, both large and small. We help all types of clients by discovering and defining problems, and bringing resolution through customized designs. Our team offers diverse expertise, allowing us to tackle complex situations that push us to seek inventive solutions.

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Dibble Engineers Inc. (DEI) provides full service structural engineering design, with a focus on hands-on client service. Each engagement, no matter the size or fee, receives face time with our project managers. We enjoy ongoing relationships and repeat business with developers, homeowners, architects, and other building professionals.
Structural Engineering and Design

Structural Engineering and DesignWhether we are working with a developer, architect, contractor, or a homeowners’ association, DEI collaborates to create solutions that meet the goals and vision for each project we approach. We create structural systems that balance the unique characteristics of a project with the budget, expectations, and design parameters of our clients – always adapting our techniques to ensure project success. Our commitment to helping understand and prioritize project needs allows us to offer creative approaches that stand the test of time.

DEI’s expertise is concentrated on new construction, remodels, tenant improvements within existing structures, engineering for deferred submittal, and seismic retrofits. Our projects typically range from one to ten story structures.

Building Investigations

Building InvestigationsWhen structures fail, DEI provides structural investigations to understand a building’s issues, and create an effective remediation plan. Our investigations include reliable results and tested solutions, outlined in concise reports that owners, architects, and contractors can use for construction repairs. Clients and contractors appreciate our clear scopes of work, responsiveness to questions, and our willingness to educate audiences on causes, solutions, and prevention for the future.

Litigation Support

LitigationDEI serves as an expert witness for legal counsel and homeowners’ associations, helping to bring resolution to project challenges. Our experts work with both parties to explain the causes of problems, and propose reliable solutions based on building codes and best practices. We have experience testifying on behalf of both the plaintiff and defense, and are always committed to clearly communicating the facts surrounding the case in a fair and professional manner.

Our background in building investigation and remediation design ensures that we have the engineering knowledge to effectively prepare for each case, and provide clear testimony that presents a thorough yet compelling picture of the situation at hand.

Seismic Evaluation and Retrofit

Seismic Evaluation and RetrofitDEI’s team includes seismic experts who design modifications to existing structures to make them more resistant to seismic activity, ground motion, or soil failure due to earthquakes. With broad experience in analyzing and retrofitting a variety of structures, we create safer facilities that can endure the Puget Sound area’s unpredictable seismic activity. Our understanding of the region’s geography, local and national standards and regulations, and our commitment to utilizing the latest techniques allows us to help control potential building damage, and protect the safety of occupants.


permittingDEI offers clients project efficiency in obtaining permits for structurally based work. We know that time is money, and we keep projects on schedule and help avoid unforeseen permitting challenges. By serving as the prime consultant, we successfully manage the permitting application process with building departments. We create the drawings and calculations required for submittal, conduct pre-application appointments with regulatory departments, complete required forms, and serve as the primary contact to obtain permits and keep projects on track.

Civil/Site Structures

Civil Site StructuresDEI utilizes our broad scope of design experience to assist contractor teams by serving as the Specialty Structural Engineer (SSE) for unique structures. Our comprehension across a variety of project types allows us to help create solutions such as soil shoring designs, tide gates, pump structures, detention vaults, bridges, concrete retaining walls, and pedestrian bridges. These components are often noted on contract documents as being bidder-designed, deferred submittal, or designed-by other. In addition, we serve public agencies by helping to implement these designs through construction support, ensuring that improvement needs are appropriately addressed.

Forensic Engineering

Forensic EngineeringWhen structural systems and building components fail to function as intended, DEI works to isolate the causes of failure and assist owners, attorneys, and contractors in settling disputes. We determine the cause of the problem, develop a solution, implement the repairs, and help minimize legal conflict.

Our team is comfortable working with all parties to simply explain the cause of the system failure, and propose reliable solutions based on best practices. Using a straightforward approach, we aim to resolve defects and eliminate the need to go to court. Our experts are experienced in testifying for both the plaintiff and defense parties, focusing on bringing resolution to structural challenges.

Construction Support

Construction SupportAs full service engineers, we pride ourselves on being responsive to our clients’ needs, especially during the construction process. We ensure that designs are implemented as intended by reviewing shop drawings, calculations/drawings for elements designed by others, and special inspection reports. We provide clarifications for contractors, and promptly reply to Architect’s Supplement Instructions and Requests For Information. We offer an in-person presence to address design and construction challenges immediately, with the goal of keeping projects on track for successful completion.

Value Engineering

Value Engineering

Value engineering is the practice of analyzing and balancing the functions and costs of a project, resulting in value improvements. DEI participates as members of value engineering teams, where we collaborate with other design professionals to offer creative solutions that balance project costs with design functionality, while preserving quality. Our final recommendations save money and often result in compressed schedules, offering efficiency in the design and construction phases.

DEI also serves as a peer reviewer, offering a second set of eyes on structural designs created by others, to offer ideas to value engineer the structure.

Building Assessments and Evaluations

Building Assessments and EvaluationsWhether clients require a due diligence report on the structural condition and safety concerns of a potential real estate purchase, or a post-event condition assessment after a fire, earthquake, or other property damage, DEI offers a thorough investigation process that evaluates structural performance and ensures code compliance.

Our staff members are certified in post-event on-site assessments, and we offer in-depth knowledge of a variety of construction techniques.

When purchasing a property or a building, clients rely on DEI for comprehensive reports that assess the structural condition of a site. We help keep the real estate transaction process moving by responding promptly to urgent assessment requests. We also help prospective building owners understand the feasibility of potential structural modifications.

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Contact Us

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  • Dibble Engineers Inc.

    1029 Market Street

    Kirkland, Washington 98033

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Please note that we have moved to our temporary physical address thru June 2018:

Dibble Engineers Inc.

10809 120th Ave NE

Kirkland, Washington 98033


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