Leader

Rick Klar, PG

Rick has more than 25 years of diversified experience in geologic and hydrogeologic investigations and serves as the corporate discipline leader for geoscience services. He is responsible for implementing/overseeing site exploration and characterization activities in support of geologic/hydrogeologic investigations, geotechnical engineering, water resourcing planning, Edwards Aquifer protection, and environmental assessment objectives.

Endeson 'EJ' Juanda, PE

Bringing over 18 years of experience, EJ serves as a cross-department Geotechnical Consultant for Raba Kistner, concentrating in the transportation arena, with an emphasis on state and federally-funded transportation projects and other horizontal construction projects. In addition, he also works as a Senior Geotechnical Engineer or Senior Project Manager on assigned transportation-related geotechnical engineering projects, providing review of project reports and working closely with clients to make sure budgets and schedules are met.

Andrew Hunt, PE, CFM

As Vice President, Andrew Hunt works alongside executives and community leaders from first imagination through construction completion of their facility projects. Whether moving a wall or building a campus, Andrew brings his high-energy passion and broad technical experience to leading teams through the planning, funding, design, and construction of clients’ projects. Andrew also leads our Strategic Asset Management service by providing tailored, strategic facility O&M advice. Andrew is a licensed Professional Civil Engineer, a Certified Facilities Manager, and a graduate of Texas A&M University.

Gary Hall

With over 30 years of experience, Gary Hall holds extensive knowledge and expertise in commercial, sports, and entertainment construction. A valued industry leader, Gary excels at bringing teams together on large, complex projects and doing so with integrity and respect. He currently represents Project Control and PC Sports as a Senior Vice President and is responsible for overseeing the Central Texas office. Gary received his Construction Science degree from Texas A&M University and was recently honored by his alma mater as an Outstanding Alumnus by the College of Architecture.

Charles 'Dude' Hall

Dude has over 30 years of professional experience in the environmental field in both the government and private sector. Dude led Timber Creek Environmental (TCE), which was acquired by Raba Kistner in 2018. The firm was based in Conroe with additional offices in San Antonio and Dallas. Dude's leadership at TCE focused on supporting the manufacturing/industrial sector with major national clients. In Dude's current role, he is supporting the expansion of our environmental services in the Houston, Dallas-Fort Worth and San Antonio marketplaces, as well as across other regions and nationally for large clients.

Jeff L. Haberstroh

Jeff Haberstroh has accumulated over 30 years of experience as a Project Manager in the San Antonio region. Jeff holds extensive experience managing bond programs and construction projects for municipalities and school districts, including most recently leading the Project Control team on the Henry B. Gonzalez Convention Center and Alamodome expansion and renovations projects for the City of San Antonio. As a Program/Project Manager, he has managed all project phases from concept, contract negotiations and pre-construction services to complete bond oversight and project operations, to budget and schedule management.

Nabil Ghannam, PMP

Nabil Ghannam is a results-driven CoMET Department Manager with over 20 years of experience leading Houston’s construction materials testing operations. He oversees complex CoMET programs, enhances QA/QC processes, and ensures strict compliance with industry standards across every phase of construction. Nabil is recognized for his strong client relationships, clear communication, and ability to deliver reliable, high-quality testing services that support developers, contractors, and public agencies throughout the Houston region.

Isabel Gongora, CPA

Isabel Gongora is a dynamic and results-oriented leader with more than 20 years of expertise in accounting, financial reporting, and operational management. As a licensed CPA and holder of a Master’s degree in Accounting from the University of the Incarnate Word, she brings a deep understanding of GAAP financial reporting, financial analysis, and internal controls. Her forward-thinking approach has consistently driven significant improvements in efficiency, accuracy, and regulatory, establishing her as a trusted advisor and a driving force for organizational growth.
Throughout her career, she has worked across diverse business units, entities, and divisions—partnering with senior leadership to align financial operations with strategic goals. Known for her integrity, collaborative spirit, and strong work ethic, she leads and mentors high-performing teams while fostering a culture of trust and accountability. Her ability to distill complex financial concepts into clear, actionable insights makes her a valued advisor and strategic partner.
Tech-savvy and future-focused, Isabel embraces emerging technologies and artificial intelligence to streamline processes and elevate data quality. Whether refining procedures, guiding audit readiness, or developing talent, she approaches every challenge with clarity, precision, and a commitment to excellence.

Troy Gardner, PE

Troy Gardner has over 15 years of experience in materials testing, inspection, and project management on major transportation, government, industrial, and commercial projects. He has held key roles on several large-scale UDOT projects, including serving as Quality Construction Manager on the West Davis Corridor, Quality Manager on UDOT’s first $525M Progressive Design-Build project, and Lead Engineer on the $415M Technology Corridor I-15 widening. His expertise includes leading inspection and testing teams, managing quality programs, and coordinating with contractors, UDOT, and stakeholders on complex, high-value infrastructure projects.

Steven W. Funderburg, PE

Steven has more than 40 years of professional experience, including 25 years with Raba Kistner. While he is an engineer, he is educated in both science and engineering and has professional experience in both disciplines. During his career, he has successfully managed a wide variety of projects that have required contributions from scientists, engineers, and professionals from non-scientific fields.

Susan Filyk, MBA

Susan leads Raba Kistner’s marketing team and is responsible for the firm’s branding, public relations and corporate communications. Joining Raba Kistner in 2018, Susan brings more than 25 years of experience in communications and marketing in the corporate and non-profit sectors, focusing on branding strategy, creative management, product development, content creation, and investor relations.