Company History
Seymour Engineering opened in January 2005 as a father-and-son venture with Mark Seymour, Sr. and Mark Seymour, Jr., who shared the same simple goal: give local communities engineering work they can count on.
Eight months later, Hurricane Katrina hit.
The Seymours didn’t retreat; they went to work. They helped coastal governments navigate debris, flooding, destroyed infrastructure, and the massive logistics of recovery. Their team oversaw projects across Harrison and Jackson County, supporting everything from dredging and debris monitoring to rebuilding wastewater systems and restoring major industrial sites.
Katrina-related projects included: Signet Maritime, Huntington Ingalls Industries’ Maritime Training Facility, Jackson County Services Complex, Signal International, new wastewater treatment plant in Harrison County, and the I-110 Marina in D’Iberville.
Those early years weren’t just busy, they shaped the company’s character: steady, practical, responsive, and committed to helping clients through complex challenges.
As the Gulf Coast rebuilt, so did the company. Seymour Engineering expanded from traditional civil engineering into surveying (including highly specialized hydrographic work), infrastructure planning, environmental and permitting services, and large-scale municipal projects. They invested in better tools, better technology, and highly qualified people, but they kept the same hands-on leadership and small-firm responsiveness they started with.
Over the last two decades, the team has had a hand in projects that matter to everyday life on the Coast: the Sangani Promenade roadway network, the Sound Amphitheater, city-wide lift station upgrades, drainage improvements, the City of Gautier’s musical inclusion playground, and major sewer rehabilitation efforts.
Seymour Engineering’s reputation wasn’t built on slogans. It was built on showing up, solving problems, and delivering what they promised – on time and within budget.
Today, Seymour Engineering remains a trusted local partner for municipalities, commercial clients, and industries, and it maintains the same mindset that started it all: Be flexible. Be responsive. Do good work. Treat people right. And build projects that make the Gulf Coast better.
