Project Engineer III; St. Louis, MO

Redefine What’s Possible in Structural Engineering — With Apex Structural Engineering

At Apex Structural Engineering, we’re not just designing buildings — we’re reshaping how they’re delivered. As the firm behind Accelerated Project Delivery™ (APD), we cut months from traditional construction timelines by integrating structural design with shop drawing production, advanced modeling tools, and real-time collaboration.
Whether you're a seasoned engineer ready to push the boundaries of innovation, or a recent graduate eager to make an immediate impact, Apex offers a place where your ideas are heard, your growth is prioritized, and your work changes the pace of the industry — all within a culture that values flexibility, well-being, and true collaboration.

Join a team where engineering meets acceleration — and where your next step elevates everything.

The Project Engineer III is an experienced structural engineer with demonstrated proficiency in structural analysis, design, and project documentation. Working under the direction of Project Executives and Project Managers, the Project Engineer III performs advanced and complex structural engineering assignments and provides significant technical support throughout the design and construction phases of projects.

At this level, engineers are expected to demonstrate strong technical judgment, proficiency with Apex's preferred analysis and design software, and a comprehensive understanding of structural systems, construction documents, and project coordination. Project Engineer III team members also contribute to the technical development of less-experienced engineers and participate in Apex Technical Advisory Groups to advance the firm's engineering standards, tools, and technical knowledge.

• Perform advanced structural analysis and design of complex structural components and building systems using applicable building codes, design standards, and engineering principles.
• Develop and evaluate complex structural analysis models, including three-dimensional gravity and lateral building models, and establish appropriate modeling assumptions, loading conditions, boundary conditions, and design parameters.
• Evaluate structural analysis results and apply engineering judgment to identify unusual behavior, load distribution, forces, reactions, deflections, stability concerns, or modeling conditions requiring further evaluation.
• Develop structural design solutions for complex conditions and evaluate alternatives based on structural performance, constructability, efficiency, and project requirements.
• Apply and interpret ASCE 7, IBC, AISC, ACI, TMS, SJI, and other applicable codes and standards, including provisions requiring engineering interpretation beyond routine design applications.
• Develop and review structural calculations and engineering documentation for completeness, consistency, appropriate design assumptions, and conformance with project design criteria and applicable standards.
• Proficiently read and interpret architectural, structural, and other project construction documents and use those documents to develop and coordinate the structural design.
• Review architectural and MEP/FP drawings and models to identify structural impacts, coordination requirements, penetrations, equipment loads, clearances, support requirements, and potential conflicts affecting the structural design.
• Coordinate structural design requirements with architects and other engineering disciplines under the direction of the Project Manager or Project Executive and assist in developing solutions to multidisciplinary coordination issues.
• Develop engineering information required for structural drawings and models and work with BIM/modeling team members…