David Ryan Mangum – Finding Profit in the Details of a Plant
David Ryan Mangum grew up in Rocky Mount, North Carolina, and took some college courses before heading into manufacturing work. He never finished a four-year degree, and he has never needed one to prove he understands a production floor. What he built instead came from years spent inside plants, watching where money leaked out of a process and learning how to stop it.
Today Mangum is President of SMT, Inc. The path to that title ran through operations and plant management roles where cost control was not a side project. It was the job.
Learning the numbers behind the work
Mangum's run as Operations Manager at Pamlico Air, from 2021 to 2022, put him close to the line items that decide whether a plant makes money or just makes product. Labor hours, scrap rates, downtime, every one of those numbers has a dollar sign attached, whether anyone on the floor thinks about it that way or not.
That is where Mangum says the real work starts. A machine sitting idle for twenty minutes does not look like a cost. It looks like nothing happening. But twenty minutes multiplied across a shift, a week, a year, adds up to a number a plant manager has to answer for. Mangum spent his time at Pamlico Air building the habit of asking what a slow afternoon actually costs, not just noticing that it was slow.
Building a profitable plant culture
From 2023 to 2026, Mangum was Plant Manager at New Standard Corporation. This is where cost optimization stopped being a skill he applied and became a way he ran a plant.
Mangum has said he builds strong teams through trust, relationships, and accountability. At New Standard, that philosophy and profitability improvement were not separate tracks. A team that trusts its manager will tell him when a process is wasting time or material. A team that feels no accountability will let the waste slide, because it is not their money on the line.
Mangum's approach was to make the numbers visible and shared, so the people running the equipment understood what a defect or a missed changeover actually cost the plant. Once people see the real figure, cutting it becomes a shared goal instead of a directive from a manager they rarely see. That is a slower way to build cost discipline than issuing a memo, but Mangum has found it holds up longer.
Carrying cost discipline into leadership
Mangum became President of SMT, Inc. in September 2026. The role widens his view from a single plant to the operation as a whole, but the questions he asks have not changed much. Where is money being spent without a return. Where is a process costing more than the output justifies. Where can a plant do the same work for less, without cutting corners on quality or safety.
Mangum is known as a manufacturing operations and team development specialist, and the two halves of that description are connected in his work. Cost optimization that ignores the people doing the work rarely lasts. Mangum's version of profitability improvement runs through the floor, not around it.
Life outside the plant
Mangum lives in Elm City, North Carolina. For fourteen years, he coached youth basketball, soccer, and baseball, work that runs on a similar logic to his day job: find what is holding a team back, fix it in small steps, and give credit when things go right.
He collects coins and spends time outdoors boating, fishing, and hunting. Family time with his grandkids rounds out a life that, like his work, favors steady habits over quick fixes. Mangum built his career the same way he spends a weekend on the water: patiently, and with an eye for the small thing that makes the bigger thing work.
