Our People

The GFDS team has the passion, experience and drive to bring fine architecture to life.

We believe each project is an opportunity to exceed our client’s highest expectations. We have a contagious confidence, energy, and enthusiasm that positively affect everyone involved, resulting in projects that are more successful and less stressful for architect, builder, and owner alike.

Working at GFDS

  • Kris Johnson

    Managing Principal

    Inspired early in his career by working with icons such as Joseph Esherick and Lawrence Halprin, Kris has made the engineering of elegant buildings the core focus of GFDS. While transforming GFDS into its leadership role today, Kris developed many architecturally driven solutions such as high-performance steel plate shear walls, in-plane steel brace gusset detailing, and special pultruded fiberglass sun shades. After hours, Kris can be found chasing waves, riding his road or mountain bike, or following his son's little league and daughter's dance careers. Kris is a licensed Structural Engineer in CA, HI, AZ, NV, and ID.

  • David Kallmeyer


    David’s enthusiasm brings design teams together to realize their visions and to create great architectural projects. He instills innovative and confident structural engineering to every design, always with an eye out for simpler and more elegant ways to design and build structures. David works to ensure that GFDS plays a leading role on projects so that design team members achieve success. David holds an MS in Structural Engineering from UC Davis, a BS in Civil Engineering from Ohio State, and a California Professional Civil Engineer’s License. David spins off excess energy by competing in soccer, cycling and skiing in the mountains of California, and running the trails of Marin. Life with his wife and three daughters is filled with soccer coaching, school projects, and general mayhem in the great outdoors.

  • Russell Fudge


    Russell received his education in structural engineering at Princeton University and the University of California at Berkeley and is a registered Structural Engineer in the State of California. He takes great pride in his leadership role at GFDS in the structural design of the Franklin Roosevelt Memorial, The River Beautification Project in Flint Michigan, and the Addition and Seismic Retrofit Project for the Legion of Honor Museum. Russell is a past president of the Structural Engineers Association and his community service includes many years of involvement with the Hydrocephalus Association. He enjoys walking to work from his Russian Hill neighborhood.

  • Ellen Huang

    Senior Associate

    Ellen joined GFDS in 1998 and has managed projects ranging from schools and high end residential construction to complex historic preservation. She particularly enjoys projects that challenge her to "think outside the box”. Ellen earned both her BS in Civil Engineering and MS in Structural Engineering Mechanics and Materials from the University of California, Berkeley. She is a LEED Accredited Professional and a Licensed California Structural Engineer. Outside the office, she enjoys the challenges of raising her two children and cycling the mountains and back roads of the bay area and playing tennis.

  • Robert Reed

    Senior Associate

    Bob enjoys the challenge of bringing architectural visions to life. He believes that great designs must be built and especially likes figuring out how to detail design elements to be easily constructed. Don’t let his occasional sarcasm fool you – he’s a charismatic guy and skillfully uses his humor to enthuse team members and bring most back for more. Aside from making the architect’s dreams come true, Bob lives his own dream as lead guitarist in his Marin-based rock band. Bob holds his bachelor's degree in Mechanical Engineering from UC Santa Barbara and his master’s degree in Civil Engineering from Berkeley. He is a Licensed California Structural Engineer.

  • Chris Wilson

    Senior Associate

    Chris spent six years with GFDS in San Francisco before moving to The Big Island of Hawaii in 2005 to open and anchor our Kamuela office. He brings his efficient design skills to his work on complex residential and resort properties, and especially appreciates the use of native materials in island design. Chris holds his bachelor’s in Civil Engineering from Santa Clara University and is a Licensed Structural Engineer in the states of California and Hawaii. Chris enjoys spending time with his family and coaching and playing soccer.

  • Matt Davidson

    Project Manager

    Matt has over 14 years of architectural engineering experience in the design of high end residential, commercial, and resort related projects. He started his early engineering career as an MEP engineer, and has focused on structural engineering over the past 10 years. Matt has solid structural design experience on challenging architectural projects consisting of a wide range of materials. He is known for working closely with Architects and MEP/Systems consultants to produce elegant constructible designs. Aside from work, Matt is an avid skier and loves mountain biking and yoga.

  • Randy Braun

    Project Manager

    After thirteen years as a finish carpenter and construction project manager, Randy exchanged his tool belt and hammer for a pencil and ruler. He completed his bachelor’s degree from UC Davis in 2004 and immediately went to work for GFDS. Now he gets to engineer the high-quality homes that he used to build. Outside of GFDS, Randy enjoys spending time with his wife and two children, restoring his Porsche 914, and learning to play the guitar.

  • Mae Ayroso

    Junior Project Manager

    Mae joined GFDS Engineers in June 2015 bringing with her years of DSA and Revit modeling experience. She enjoys collaborating with architects and engineers on a variety of construction projects. A Licensed California Structural Engineer, she earned her bachelor’s degree in Structural Engineering from UC San Diego and her master’s degree in Civil Engineering from UC Berkeley. When not at the office, Mae spends her time with her husband and two boys who share her love for hiking, traveling and all things football.

  • Philip Bastiao

    Junior Project Manager

    After working on large commercial, biotech, and mission critical projects for almost 10 years, Philip wanted to explore his passion for more personal and detailed structural projects so he joined our team in February 2015. Philip is a licensed Structural Engineer in the State of California and possesses a B.S. in Civil Engineering from Cal Poly San Luis Obispo. He is also a LEED Accredited Professional. Outside of work, Philip keeps busy by listening to music on his audiophile equipment, playing the drums in a funk band, dancing Portuguese folklore, and enjoying the multitude of gastronomic experiences San Francisco has to offer.

  • Sean Arbic

    Senior Project Engineer

    Sean was born and raised in the bay area. He received his bachelors of science degree in Mechanical Engineering from UC Davis. While in college, Sean worked in construction and developed many practical skills as a carpenter and project manager. After college he worked as a Civil Engineer and CAD Manager, where he developed a deep affinity for the design and documentation of civil and structural projects. His work experience broadly ranges from small residential additions to large infrastructure projects like the east span of the SF Bay Bridge. Sean enjoys working on challenging designs that are unique and innovative. When he isn’t designing, Sean spends every available moment with his wife and two children. His hobbies include crossword puzzles, drawing, sports, outdoor activities like hiking, hunting and fishing, and cooking.

  • Justin Brodowski

    Senior Project Engineer

    Justin is a licensed Professional Engineer and joined GFDS in 2017. He began his career as a carpenter and licensed contractor, working on residential remodels in San Francisco. After working as a contractor, Justin went back to school to get his Masters in Structural Engineering at San Francisco State University. Prior to GFDS, Justin worked as a Design Engineer in the Bay Area specializing in residential projects. When he is not in the office, Justin enjoys playing ice hockey, skiing, and backpacking. He is also a part-time lecturer for Wood Design at San Francisco State University.

  • Richard Wong

    Senior Design Engineer

    A San Francisco native and Bay Area resident, Richard joined GFDS Engineers in 1996. He enjoys computer modeling of structures but isn’t afraid to go crawling around in an old attic or crawlspace performing field measurements or exploratory investigations. He has taken interest and the initiative on various computer-related projects involving IT and CAD for the firm. Richard earned both his master’s and bachelor’s from UC Berkeley, and is a LEED Accredited Professional and a California Professional Civil Engineer. During off-hours, he enjoys hiking, basketball, and working with his wife on projects around the house, including landscaping, building arbors, fixing fences, and organic gardening.

  • Julia Hawkins

    Design Engineer

    Julia is GFDS' resident Canadian. She moved to the Bay Area after completing her Bachelor of Engineering degree in Nova Scotia in 2017. Julia joined GFDS fresh out of her undergraduate degree and has enjoyed the wide variety of project exposure that GFDS offers. Whether it is high-end residential or large-scale hospitality, there's always an exciting new challenge to tackle. Outside of work you can find Julia backpacking, taking on cooking projects, and cycling around the Bay Area.

  • Jessica Church

    CAD Designer

    Jessica grew up in Northern California around the construction industry, as her father was a carpenter and eventually the foreman for a foundation company. Weekend help or trips to job sites with her father were not uncommon. Jessica studied drafting and architecture beginning in junior high and continued through college. After working as a CAD Designer for architects in Santa Rosa and Petaluma, she decided to make the move to San Francisco when she joined GFDS in 2007. Outside of work Jessica enjoys many diverse activities - she is a fiber artist and has a passion for music, yoga and cooking.

  • Tracie Johnson


    Tracie is our cheerful and diligent bookkeeper who keeps our busy office organized and fiscally on track. She has been an accountant in the architecture and engineering industry for several Bay Area firms and has found that her passion is helping small business owners understand and better control their bottom line. Tracie is a native San Franciscan and a Dillard University graduate. She is certain that she was a detective in a past life and enjoys employing her investigative side to solve accounting issues. In her next life, she hopes to be reincarnated as the great photographer, Annie Leibovitz.

  • Liz Eugene Davis

    Operations Manager

    Liz is a seasoned business manager with over 10 years’ experience working in the AEC industry. She holds the responsibility for the strategic management and development of GFDS’ administrative function. She is a global citizen and holds a B.S. in Business Management and B.S. in Marketing from the University of the West Indies. Outside work, Liz is actively involved with supporting her children at their many activities, discovering distant lands and places, volunteering in her local community, learning new dance routines, and bunting out her multi-fold energy on the car racetrack with her husband.