Edit: The Machinist Who Went From Sweeping Floors to $6.8M

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The part Rodrigo Esparza is holding is about the size of a deck of cards, machined from a single block of 7075 aluminum, and it is very nearly perfect.

He turns it over in his hands slowly, checking a chamfer at one edge with his thumbnail, bringing it close to examine the surface finish under the fluorescent light of the inspection room. It will eventually be bolted into a ground support assembly for a military aircraft. It must be within one-thousandth of an inch of specification across eleven critical dimensions. Esparza already knows it passes — his quality system flagged it green before it ever reached his hands — but he checks it anyway.

"I've been doing this for twenty-three years," he says, setting the part down on the inspection granite. "I still hold every first article. Every one."

Rodrigo Esparza is 43 years old. Esparza Precision Manufacturing occupies a 28,000 square foot facility in San Antonio's North Loop industrial corridor, employs 47 people, and closed 2025 with $6.8 million in revenue. His customers include three Tier 1 aerospace suppliers, two defense prime contractors, and seven industrial clients. He has never taken outside investment. He turned down an acquisition offer two years ago.

He started this company with one used machine and $58,000.

## A Mechanic's Son

Rodrigo's father, Ernesto, was an auto mechanic in Monterrey. Not a hobbyist who turned wrenches on weekends — a working mechanic with his own small shop, a man who rebuilt carburetors and diagnosed engine trouble by sound. Rodrigo spent his childhood in that shop, handing over tools, watching his father's hands move through complex problems with systematic calm.

"He never got frustrated," Rodrigo says. "He'd just work through it. Step by step. I think that's where I learned how to think."

The family came to San Antonio in 1998, when Rodrigo was twelve. His father found work as a mechanic at a car dealership; his mother cleaned houses. They settled in the South Side, in a neighborhood where the street names were Spanish and the grocery stores were Mexican-owned and the dream, for most families, was to save enough to move somewhere else.

Rodrigo was a middling student. He didn't struggle, but school didn't grip him. The things that gripped him were machines — the way they worked, the precision required to make them work correctly, the gap between something broken and something running.

At 17, through a referral from a family friend, he got a part-time job at Hernandez Industrial, a small machine shop on Zarzamora Street. His job was to sweep metal chips off the floor, wipe down machines at the end of the shift, and stay out of the way.

"They paid me seven-fifty an hour," he says. "I would have paid them."

## The Slow Education

Hernandez Industrial made parts for oil and gas clients, local manufacturers, small industrial customers. Nothing glamorous. But the owner, a machinist named Felix Hernandez who'd built the shop over 30 years, ran a serious operation. Tolerances were real. Scrap was tracked. Quality mattered.

Rodrigo was supposed to sweep floors. Instead, he watched.

Hernandez noticed. After eight months, he let Rodrigo run a manual lathe on scrap material after the day shift ended — no clock, no pressure, just practice. Rodrigo came in three nights a week. He bought machining textbooks with his paychecks. He read them in the break room during lunch.

"Felix would sometimes come in and find me there at nine o'clock at night, still cutting practice pieces," Rodrigo says. "He never told me to leave. He just looked at what I made and told me what was wrong with it."

Rodrigo got his Journeyman Machinist certification at 22. Over the next eight years, he worked his way from machine operator to lead CNC programmer at Hernandez Industrial. By 30, he was earning $72,000 a year, managing a team of six, and handling the most complex jobs the shop took in.

Then Felix Hernandez sold the shop.

The new owners were a regional manufacturing group. Within a year, tooling budgets were cut, maintenance schedules slipped, and quality standards that Hernandez had enforced for decades became suggestions. Rodrigo watched a shop he loved start to erode.

"I couldn't fix it from inside," he says. "So I left."

## The Bet

Rodrigo had been saving for three years by the time he walked out of Hernandez Industrial. He had $58,000 in a savings account and a specific number in his head: $67,500. That was the asking price, at the time, for a used Haas VF-2 CNC machining center — a four-year-old machine, well-maintained, being sold by a Colorado shop that was upgrading its equipment.

He also applied for an SBA 7(a) loan. He was denied the first time. He rewrote his business plan over a weekend, resubmitted it, and was approved for $40,000 four weeks later.

"People always ask if I was scared," he says. "Of course I was scared. I had a wife, one kid, another on the way. But I also knew what I could do. I knew the quality I was capable of. I just needed a machine to do it on."

In January 2012, he signed a lease on a 2,400 square foot industrial bay in a San Antonio business park for $1,800 a month. The machine arrived on a flatbed truck on a Tuesday morning. He helped unload it.

For six months, he worked alone.

> "I knew what I could do. I just needed a machine to do it on."

His first customers were industrial — a water treatment company that needed custom-machined valve bodies, a local manufacturer that needed aluminum housings for electrical equipment. Nothing aerospace, nothing defense. Simple parts, tight schedules, reasonable margins.

He was cash-flow positive within four months. He hired his first employee in month seven.

"I paid him more than I paid myself," Rodrigo says. "For the first year and a half, that was the deal."

## The Certification That Almost Broke Him

In 2014, a contact from the machining industry mentioned offhandedly that Rodrigo should pursue AS9100 certification. AS9100 is the quality management standard for aviation, space, and defense manufacturing. It is how you get into the aerospace supply chain. Without it, aerospace customers will not talk to you.

Rodrigo looked into it. The process required an overhaul of his entire quality management system, the documentation of every process, specialized training for all personnel, and an external audit from a certified registrar. The consulting fees, training costs, and audit expenses would run, he was told, somewhere between $60,000 and $100,000.

He had about $40,000 in operating reserves at the time.

"Everyone I talked to said wait," he says. "Get bigger first. Get more customers. Then certify. I thought: without the certification, I can't get the customers. So which comes first?"

He decided the certification came first.

He hired a quality systems consultant who charged $85 an hour and worked with her for fourteen months to build the documentation infrastructure, train his staff — by this point, seven employees — and prepare for the audit. He drew his salary down to $36,000 for a year. He refinanced his house to cover a $22,000 shortfall when the process ran over budget.

"My wife's name is Luz," he says. "She never once said this was a mistake. I want to be clear about that. She is the reason I got through that year."

Esparza Precision received its AS9100 certification in March 2016. Rodrigo's entire team was present for the final audit. When the registrar handed him the certificate, he excused himself, walked to the parking lot, and sat in his truck for ten minutes.

"I just needed to be by myself for a minute," he says. "I wasn't emotional about the paper. I was emotional about the fourteen months of work that led to it."

## The Part That Changed Everything

The aerospace contract referral came six weeks after certification.

A Tier 2 supplier to Lockheed Martin needed 200 aluminum brackets for F-35 ground support equipment. The previous vendor had failed a first-article inspection. They needed a replacement shop with a proven quality system who could deliver in 90 days.

Rodrigo quoted it. He got the contract.

He delivered 200 parts in 71 days. First-article inspection: 100% pass.

"They called me the day after the inspection," he says. "The quality manager said, 'I don't usually call vendors to tell them they passed. But your documentation was flawless.' I wrote that down in my notebook."

Within a year, Esparza Precision was on the approved vendor lists of three aerospace companies. The revenue doubled. He leased the adjacent bay — another 2,400 square feet — and bought a second machine.

## A Different Kind of Shop

In 2017, Rodrigo started hiring deliberately. His first two new hires were machinists he'd worked with at Hernandez Industrial — people he'd trusted for years. But as the team grew, he made a conscious choice about where to recruit.

"I knew where the talent was," he says. "It was in South San Antonio, in Laredo, in the colonias. Kids who grew up working on cars with their fathers. Kids who knew how tools worked. Kids who just needed someone to train them seriously."

Today, Esparza Precision has 47 employees. Thirty-eight are Hispanic. Eleven are women — an unusual number for precision machining, where women represent roughly nine percent of the workforce nationally. Starting machinists earn $28 per hour. The industry average is $22 to $24.

"I can afford to pay more because I don't have waste," Rodrigo says. "We hold tolerances. Our scrap rate is under two percent. That's the math. Quality people produce less waste, and less waste pays for the better wages."

He runs a formal apprenticeship program in partnership with Palo Alto College, the local community college. Every semester, four apprentices cycle through the shop, spending two days a week on the floor alongside experienced machinists. Rodrigo teaches one of the sessions himself.

"I think about Felix Hernandez a lot when I'm doing those sessions," he says. "He's the one who let a kid practice on his machines after hours. I owe him a debt I can't pay back to him directly. So I try to pay it forward."

## Where Things Stand

Esparza Precision closed 2025 with $6.8 million in revenue across its three primary aerospace customers, two defense contractors, and seven industrial accounts. Rodrigo's 28,000 square foot facility runs two shifts, five days a week. He has a five-axis machining center, two four-axis mills, three standard CNC lathes, and a full CMM inspection room staffed around the clock.

Last year, a private equity-backed manufacturing roll-up approached him about an acquisition. He heard them out for two meetings and declined.

"The price was fine," he says. "But the business would stop being what it is. The margins would get squeezed. The wages would come down. The apprenticeship program would disappear. None of that was acceptable."

His father, Ernesto, came to see the facility when Rodrigo moved into the current space in 2021. The two of them walked the floor together — past the machines running at 5,000 RPM, past the inspection room with its granite surface plate, past the racks of tooling organized with the precision of a surgical suite.

"He didn't say much," Rodrigo says. "He's not a man who says a lot. But at the end, he picked up one of the parts we'd just finished — a titanium fitting for a hydraulic system — and he held it the same way I hold first articles. Turned it over in his hands. Checked the finish with his thumb." He pauses. "Then he put it back and nodded."

In the neighborhood where Rodrigo grew up on San Antonio's South Side, success was always defined as leaving. Getting out. Moving somewhere better. The dream was somewhere else.

"I didn't leave," Rodrigo says. "I built something here. I employ people from here. I trained them here. What we make gets put on aircraft and comes back to the ground in one piece because we did our jobs exactly right, every time."

He picks up the aluminum bracket again, turns it over once, sets it back on the inspection granite.

"There's no shortcut in this work. A part either passes or it doesn't. I think that's what I love about it."

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