Business Details
49 Years
experience
Trusted Civil and Structural Engineering Solutions in Missouri
Founded in 1977, VonArx Engineering has built a legacy of delivering high-quality civil and structural engineering solutions with a commitment to integrity, collaboration, and client satisfaction. Our team prioritizes personalized service, leveraging decades of experience to address complex challenges across transportation, stormwater management, site development, and structural design. With a focus on timely, cost-effective outcomes, we maintain long-term client relationships through transparent communication and a dedication to exceeding expectations. Headquartered in Jefferson County, Missouri, we serve public and private clients statewide, combining technical expertise with a deep understanding of community needs. Our leadership team brings specialized knowledge in hydraulics, hydrology, and infrastructure design, ensuring projects meet regulatory standards while balancing environmental and built environment considerations.By fostering partnerships with clients and agencies, we develop tailored solutions that protect public safety, enhance communities, and drive sustainable growth. Our structural inspection services, with 25 years of experience, provide critical assessments for residential and commercial properties, supporting informed real estate decisions. Recognized for consistent innovation, we handle projects of all scales, from small residential developments to large municipal infrastructure. Client referrals and repeat business underscore our reputation for ethical practices and technical excellence. As a family-owned firm, we remain steadfast in our founding philosophy: delivering exceptional engineering services with honesty and accountability.
Services
Transportation Engineering
Storm Water Management
Site Development
Structural Design
Sewer Systems
Structural Inspections
Details
- Year established: 1977
Highlights and features
- We offer 40+ years of experience in civil and structural engineering projects across Missouri.
- Our team provides collaborative, client-focused solutions tailored to specific project requirements.
- We deliver cost-effective designs that balance environmental stewardship with infrastructure needs.
- Our structural inspection services have 25 years of proven expertise in residential assessments.
- Client referrals and repeat business validate our commitment to ethical, high-quality engineering.
Services
Transportation Engineering
We design and implement transportation infrastructure projects including roadway improvements, intersection upgrades, and pedestrian enhancements. Our team addresses traffic safety and capacity needs while ensuring compliance with federal and state regulations. With expertise in drainage integration and federal funding requirements, we deliver connected, sustainable transportation systems for Missouri communities.
Storm Water Management
Our stormwater solutions focus on flood mitigation, watershed analysis, and low-impact development techniques. We create detention basins, stream stabilization systems, and BMP-compliant designs that protect property while maintaining environmental balance. Services include FEMA map amendments and MSD regulatory compliance for comprehensive water management.
Structural Design
We provide structural design for commercial, residential, and industrial buildings including foundations, retaining walls, and retrofit solutions. Our engineers ensure code compliance for steel, concrete, and wood structures while addressing historic preservation challenges and modern construction requirements across Missouri.
Structural Inspections
With 25 years of experience, we conduct residential foundation inspections and manufactured home certifications. Our engineers deliver detailed reports for real estate transactions, including FHA/VA compliance evaluations and repair recommendations to facilitate loan approvals.
Site Development
We manage residential and commercial site development projects from zoning to construction completion. Services include subdivision design, utility coordination, and environmental compliance for projects ranging from single-family homes to industrial parks across Missouri.
People
Kelley Vonarx
CEO, Operations & Marketing
Kelley Vonarx leads daily operations and strategic planning at VonArx Engineering with 20 years of management experience. She oversees project administration, business development, and client relations, ensuring alignment with the firm's mission of integrity-driven engineering solutions.
David Vonarx
President/Principal
David Vonarx, a licensed Professional Engineer with 28+ years of experience, directs all engineering projects and technical operations. Specializing in hydraulics and infrastructure design, he ensures technical excellence and regulatory compliance across hundreds of municipal and private projects statewide.
Questions
What engineering services does VonArx offer?
We provide transportation engineering, stormwater management, structural design, site development, sewer/water systems, and structural inspections for Missouri clients.
How does VonArx ensure project quality?
Our engineers combine 40+ years of experience with collaborative client partnerships to deliver code-compliant, cost-effective solutions that exceed expectations.
Do you handle both public and private projects?
Yes, we serve municipal agencies, institutions, and private developers across Missouri with infrastructure and building engineering needs.
What areas do you serve?
While headquartered in Jefferson County, we provide engineering services statewide across Missouri for projects of all sizes.
