Business Details
50+ Years
experience
Trusted Structural Engineering Solutions in Syracuse
Carl Jahn & Associates has been delivering structural and geotechnical engineering solutions since 1968. Our team of seasoned professionals brings an average of 25 years of experience to every project, combining traditional expertise with innovative problem-solving. With over 8,000 successfully completed projects and 30+ design excellence awards, we specialize in optimizing complex engineering challenges for clients ranging from architects to governmental agencies.Our repeat client rate exceeds 95%, reflecting our commitment to quality, reliability, and client-centric service. We maintain rigorous industry standards through continuous technical training and adherence to the latest engineering codes and methodologies. Our multidisciplinary approach ensures comprehensive solutions for new construction, renovations, and forensic analysis across diverse sectors including healthcare, education, and industrial facilities.
Services
Geotechnical Engineering
Structural Engineering
Construction Dewatering
Deep Foundations
Earth Retention Engineering
Foundation Engineering
Building Envelope
Equipment Foundations
Forensic Engineering
Peer Review
Details
- Year established: 1968
Highlights and features
- We have over 50 years of continuous engineering service experience
- Our staff maintains an average of 25 years professional expertise
- We guarantee 95%+ client retention through quality service delivery
- Our engineers hold multiple state professional licenses across the US
- We implement proven solutions validated by 30+ design excellence awards
Services
Geotechnical Engineering
Our geotechnical team specializes in subsurface investigations and foundation design. We provide comprehensive solutions for deep foundations, earth retention systems, and ground improvement projects. With expertise in site seismic evaluations and geologic assessments, we ensure structural stability through detailed soil analysis and innovative engineering approaches tailored to each project's unique subsurface conditions.
Structural Engineering
We deliver complete structural design services for new construction and existing buildings. Our engineers specialize in steel, concrete, wood, and masonry structures, providing solutions for building envelopes, equipment foundations, and vibration control systems. Our approach combines advanced analytical techniques with practical construction knowledge to optimize structural performance and code compliance.
Forensic Engineering
Our forensic engineering services identify causes of structural failures and building distress. Through detailed investigations using non-destructive testing and advanced diagnostic tools, we develop remediation strategies for building envelope systems. We provide expert testimony and litigation support based on rigorous analysis of structural performance and material behavior.
Building Envelope
We specialize in building envelope condition assessments and performance optimization. Our services include failure analysis, design development, and field testing of cladding systems. Using advanced diagnostic technologies, we evaluate air and water infiltration, thermal performance, and structural integrity to ensure durable, energy-efficient building enclosures that meet evolving code requirements.
Construction Dewatering
Our dewatering solutions manage groundwater challenges during construction. We design depressurization systems and groundwater control measures that balance project timelines with environmental considerations. Our engineers provide expert witness services and third-party reviews for complex dewatering projects, ensuring safe and efficient execution of subsurface construction activities.
People
Robert Cosselman
Principal Engineer
With 35+ years of experience, Robert leads structural engineering projects. Licensed in multiple states, he specializes in concrete and steel design while maintaining active roles in professional organizations like ASCE and ACI.
Matthew McKee
Structural Engineer
Matthew brings 17 years of structural design expertise. Licensed in seven states, he focuses on innovative building systems and serves on technical committees within the Structural Engineers Association of New York.
Erik Nelson
Structural Engineer
Erik contributes 16 years of structural engineering experience. Specializing in advanced analysis techniques, he holds licenses in multiple jurisdictions and maintains active membership in steel construction associations.
Jason Thorpe
Geotechnical Engineer
Jason provides 20 years of geotechnical expertise. Licensed in New York, he specializes in subsurface investigations and foundation design while maintaining professional affiliations with civil engineering societies.
Brent VanHatten
Structural Engineer
Brent serves as associate partner with structural engineering expertise. Licensed in New York, he focuses on building systems design and contributes to technical committees within the engineering community.
Questions
What engineering services do you specialize in?
We specialize in structural and geotechnical engineering, including foundation design, building envelope systems, forensic analysis, and construction dewatering solutions for commercial and industrial projects.
How long have you been in business?
John P. Stopen Engineering has provided engineering services since 1968, maintaining continuous operations for over 55 years with a consistent focus on structural and geotechnical expertise.
What project sizes do you handle?
We manage projects ranging from $1 million to $250 million in construction value, adapting our engineering approach to meet the specific needs of each project regardless of scale.
Do you work outside New York State?
While based in Syracuse, we serve clients across the United States, providing engineering services for projects in multiple states through our team's extensive licensing credentials.
What industries do you serve?
Our engineering expertise supports healthcare facilities, educational institutions, commercial developments, industrial sites, and public infrastructure projects through specialized structural and geotechnical solutions.
How do you ensure engineering quality?
We maintain quality through rigorous technical reviews, continuous staff training, and adherence to industry standards from organizations like ASCE and ACI, supported by our 30+ design excellence awards.
