Business Details
21 Years
experience
Trusted Structural Engineering Solutions in California
4 Stel Engineering has been dedicated to structural engineering since its founding in 2005. Our firm was established following the legacy of Edmund Foerstel, under whom our current CEO Dustin Rosepink apprenticed, cultivating over 50 years of combined expertise. We specialize in structural design for renewable energy projects, including solar canopies and battery storage systems, with extensive experience in California's strict regulatory environments. Our acquisition of Bushra Tsai Incorporated in 2021 expanded our capabilities in commercial and industrial projects, including cold storage facilities and educational institutions. We maintain active involvement in local engineering communities through organizations like ASCE and SEAOC.Our team works closely with clients to balance innovative design with practical constructability, ensuring safety and compliance across all projects. We serve public entities like school districts through DSA permitting processes and have engineered over a gigawatt of solar installations. Our commitment extends beyond projects to creating partnerships that improve communities through safe, reliable engineering solutions. With nationwide licensing and decades of collective experience, we deliver tailored structural engineering services for diverse construction needs.
Services
Tilt-Up Design
Solar Renewables
BESS
Educational Services
Residential
Details
- Year established: 2005
Highlights and features
- We offer 40+ years of combined experience in structural engineering through our acquisition of Bushra Tsai Inc.
- Our team specializes in navigating California's strictest regulatory jurisdictions including DSA and Port of Los Angeles.
- We provide solutions-oriented design balancing innovation with real-world constructability for tilt-up structures.
- Our engineers have designed over a gigawatt of solar infrastructure projects for top renewable energy firms.
- We maintain active involvement in advancing engineering practices through professional organizations like SEAOC.
Associations and certifications
- Small Business Enterprise (SBE)
- American Society of Civil Engineers
- International Code Council
- Structural Engineers Association of California
Services
Tilt-Up Design
Our tilt-up design expertise spans decades, originating from Bushra Tsai Inc.'s legacy. We engineer large-scale commercial and industrial buildings using cast-in-place concrete panels, optimizing for cost efficiency and structural integrity. Our solutions address complex challenges in warehouses, cold storage facilities, and distribution centers while maintaining compliance with strict building codes.
Solar Renewables
We specialize in structural designs for solar infrastructure including ground mounts, roof mounts, and solar thermal systems. Our engineers have completed over a gigawatt of projects for California schools and renewable energy firms. We ensure compliance with DSA requirements and other regulatory standards for safe, sustainable installations.
BESS
Our battery energy storage system designs incorporate structural considerations for safety and longevity. We guide clients through submittal processes for jurisdictions requiring specialized engineering documentation. Our experience includes integrating BESS with existing solar infrastructure while meeting evolving code requirements.
Educational Services
We provide structural engineering for K-12 schools, community colleges, and universities. Our team navigates DSA permitting processes for new construction and renovations. Services include ADA compliance upgrades, energy efficiency retrofits, and path of travel improvements for educational facilities across California.
Residential
Our residential engineering services support homeowners, contractors, and HOAs throughout Southern California. We deliver structural solutions for custom homes, renovations, and multi-family developments. Our team ensures compliance with local building departments while maintaining design flexibility for unique residential needs.
People
Dustin K. Rosepink
President & CEO
Dustin Rosepink founded 4 Stel Engineering after apprenticing under renowned engineer Edmund Foerstel. With expertise in renewable energy markets, he has led the firm to prominence in California structural engineering since 2005.
Jonathan Varela
COO
Jonathan Varela oversees daily operations at 4 Stel Engineering. He brings extensive management experience to coordinate engineering teams and ensure efficient project delivery across commercial and industrial sectors.
Kari Taylor
CFO
Kari Taylor manages financial operations for 4 Stel Engineering. Her MBA background supports strategic financial planning and resource allocation for the firm's growing engineering projects nationwide.
Roger Schumacher
Director of Engineering Operations
Roger Schumacher leads engineering operations in Mission Viejo. He specializes in coordinating complex structural projects, ensuring technical excellence and adherence to project timelines across diverse construction markets.
Mitch (Cheng Yu) Tsai
Project Executive
Mitch Tsai serves as Project Executive in Anaheim. With engineering expertise, he oversees project execution from concept to completion, focusing on client satisfaction and technical accuracy for commercial developments.
Questions
What structural engineering services do you offer?
We provide tilt-up design, solar infrastructure engineering, BESS solutions, educational facility projects, and residential structural designs.
Do you work on renewable energy projects?
Yes, we specialize in solar canopies, ground mounts, roof mounts, and battery storage systems for renewable energy firms.
Can you handle California school projects?
Yes, we have extensive DSA permitting experience for K-12 schools and community college projects across California.
Are you licensed nationwide?
Yes, 4 S.T.E.L. Engineering holds licenses in multiple states and completes projects throughout the United States.
What construction materials do you work with?
We engineer projects using masonry, steel, timber, concrete tilt-up, cold-form steel, aluminum, and pre-manufactured buildings.
How do you ensure project compliance?
Our team navigates strict jurisdictions like DSA, NAVFAC, and California Coastal Commission to ensure all regulatory requirements are met.
