A structural engineer is a specialized type of civil engineer who designs and analyzes structures to make sure they can safely support their own weight and withstand outside forces like wind, earthquakes, and heavy use. While civil engineering is a broad field covering roads, water systems, and environmental projects, structural engineering zeroes in on one question: will this structure stand up safely under every condition it might face?
What Structural Engineers Actually Do
The core job is figuring out whether a structure can handle everything that will push, pull, or press against it over its lifetime. That means calculating multiple types of forces before anything gets built. Dead loads are the constant weight of the structure itself: walls, floors, columns, roofing materials. Live loads are the temporary and changing forces, like people walking through a building, furniture, stored equipment, or cars crossing a bridge. Then there are environmental loads: wind pressure, accumulated snow or rain on a rooftop, and seismic forces from earthquakes. In coastal or below-grade structures, engineers also account for water pressure and earth pressure pushing against retaining walls.
Structural engineers design for the worst possible combination of these loads, not just average conditions. A roof in Minnesota needs to hold up under heavy snow accumulation. A high-rise in California needs to flex and absorb energy during an earthquake. A bridge needs to handle rush-hour traffic while gusting crosswinds hit its deck. The engineer’s job is to choose the right materials, dimensions, and connections so the structure performs safely under all of those scenarios simultaneously.
Beyond the math, structural engineers work closely with architects and contractors throughout a project. During the design phase, they use computer-aided design software and structural analysis tools (like Autodesk Revit for 3D building models and Robot Structural Analysis for simulating how forces move through a structure) to test their designs digitally before construction begins. During construction, they review work to confirm it matches the approved plans and meets local building codes.
Types of Projects They Work On
Most people picture skyscrapers when they think of structural engineering, but the range is much wider. Structural engineers design the load-bearing “skeleton” of residential homes, commercial buildings, hospitals, schools, and stadiums. They also design bridges, dams, tunnels, towers, highways, and large-scale infrastructure projects alongside other civil engineers.
The work isn’t limited to new construction. A significant portion of structural engineering involves evaluating existing structures: assessing whether an older building can support an additional floor, determining if a bridge is still safe for modern traffic loads, or investigating why cracks have appeared in a foundation.
When Homeowners Need One
You don’t have to be building a skyscraper to need a structural engineer. Homeowners commonly hire one for a residential structural inspection, particularly when buying a home, planning a renovation, or noticing warning signs like foundation cracks, doors that no longer close properly, or sagging floors.
During a residential inspection, the engineer examines key areas like the foundation, basement, attic, beams, and roof framing. They look for signs of structural weakness, moisture intrusion, inadequate drainage, and even damage from termites or settling soil. If problems are found, they can provide repair estimates that outline the scope and cost of fixes. This is especially valuable before a renovation, because plans to remove a wall or add a second story depend entirely on what the existing structure can handle. A general home inspector flags visible issues; a structural engineer determines whether those issues threaten the building’s integrity and what it takes to fix them.
Education and Licensing
Becoming a structural engineer starts with a bachelor’s degree in civil or structural engineering from an accredited program. After graduating, the typical path involves two licensing exams. The first, known as the FE (Fundamentals of Engineering), is usually taken around the time of graduation. The second, the PE (Professional Engineer) exam, comes later. Most states require four years of progressive, supervised work experience before you can sit for the PE exam and earn your professional license.
Some states also offer a separate Structural Engineer (SE) license, which requires passing an additional exam focused specifically on designing structures that must withstand extreme loads, like those in seismic zones. This distinction matters: in states with high earthquake risk, only engineers holding an SE license can sign off on certain building designs. The licensing requirements vary by state, so the path can look slightly different depending on where someone practices.
How Structural Engineering Differs From Civil Engineering
Structural engineering is a sub-discipline within civil engineering, the same way cardiology is a specialty within medicine. Civil engineering is the broad umbrella covering transportation systems, water resources, environmental engineering, geotechnical work, and structural design. A civil engineer might spend their career designing highway systems or wastewater treatment plants and never calculate the load capacity of a beam.
A structural engineer, by contrast, works with depth rather than breadth. Their entire focus is on whether structures are strong, stable, and rigid enough to perform safely. Within that specialty, some engineers narrow further into earthquake engineering, bridge design, or tall building construction. If you need a road designed, you want a civil engineer with transportation expertise. If you need to know whether a building will stand, you want a structural engineer.
Salary and Career Outlook
The Bureau of Labor Statistics groups structural engineers under the broader civil engineering category. Civil engineers earn a median salary that places them solidly in the upper range of engineering professions, and structural engineers with a PE or SE license typically command higher pay within that range due to their specialized expertise and the legal authority their license carries. Demand stays relatively steady because the work is tied to construction, infrastructure maintenance, and building code compliance, all of which continue regardless of economic cycles. Aging infrastructure across the U.S. keeps the need for structural assessment and retrofit work particularly strong.