Tom Mueller started life in Idaho, the son of an logger; he himself worked summers logging when he was a student. But today, Mueller is a rocket scientist and co-founder of Elon Musk's SpaceX. Mueller isn't famous like Musk, but he is a linchpin in the story of SpaceX — as chief technology officer of propulsion, he leads the team that makes sure the rockets lift off. Mueller met Musk in Los Angeles in the early 2000s through a mutual friend, and they decided to build rockets that could one day take humans to Mars.

'Do you want to be the guy who fixes the plane or the guy who designs it?'

Were it not for an inspiring high school math teacher, Mueller says he never could have even dreamed a logger's kid from St. Maries, Idaho could become a rocket scientist. Mueller says from the time he was young, he always had a natural attraction to rockets, astronomy, science fiction and space. His junior high school guidance teacher told him he should become an aircraft mechanic, Mueller told Loyola Marymount University's LMU Magazine. (Mueller got his master's in mechanical engineering at Loyola in L.A. in 1992, according to his LinkedIn page.) "Then in my first year in high school, my math teacher asked if I was going to be an engineer. I said no. He was astounded. He asked, 'Do you want to be the guy who fixes the plane or the guy who designs it?' If it hadn't been for that math teacher, I probably would have been a mechanic or a logger," Mueller told the magazine. "Thanks to him, I got the right courses to go to college." That conversation with his teacher was a powerful moment for Mueller. "No one had told me that I had the aptitude to be an engineer. I didn't even know what an engineer did. That teacher changed my life and set me on a path to success," he said in a 2018 commencement address at the University of Idaho. Mueller says he has since gone back and personally thanked that math teacher.

A natural talent for mechanics

Mueller and his three siblings grew up around machines because their father was a logger — for 45 years. Early on, Mueller, developed a natural fluency with mechanics. "I grew up around logging trucks and equipment, and chainsaws. You learn a lot from that environment. I tend to have that rare gift where I can easily conceptualize what will work. If somebody were to give me specs for a different kind of engine, I could easily conceptualize what will work," Mueller told LMU Magazine. He remembers upsetting his father when he disassembled the lawn mower. "My father came home and found the parts all over the yard. He was mad because he figured it wasn't going to go back together. I had the pistons out and the valves out. But I put it back together, and the thing ran fine," he said. "At Christmas, I always went for the Erector Set–kind of stuff," he added, referring to the toy construction kit. Mueller worked as as logger during summer breaks from school. "I have many fond memories of logging, and quite a few not so fond, but I realized that was not what I wanted to do with the rest of my life," Mueller in his commencement address. "And that helped me focus on school." He learned the value of hard work from his family. "My Dad was all about earning your way in life, no handouts, no freebies. I paid my own way, ... paid for my own car, paid my own way through college and I learned about getting the job done right and always supporting the working man," he said. "What he taught me about work ethic and integrity are part of my foundation. Those lessons follow me through my life." Mueller, the first person in his immediate family to attend college, received his bachelor's from the University of Idaho in 1985. Photo credit: Jon Rou/Loyola Marymount University

Meeting Musk

After school, Mueller decided to head west. There were not, after all, an overabundance of engineering jobs in Idaho. He packed his belongings into a tow truck and set off for California. His father was not sure what to make of his son's career ambitions. "I loaded up the moving van and headed to California to find a job working on rockets. My dad thought I was crazy," Mueller said in his commencement address. "But when I look back on that now, I realize that was a key decision — a fork in the road where I made the right choice to do what I love." There, Mueller worked at TRW, which provided technology products and services for the automotive, aerospace and systems markets in Los Angeles. (It was acquired by military contractor Northrop Grumman Corporation in 2002). But he didn't work on rocket engines. To keep himself inspired, Mueller would build rockets out of his garage at night and on weekends with an amateur rocket club. By early 2002, Mueller was working out of a friend's rented warehouse to finish his rocket. At the same time, Elon Musk was becoming a multimillionaire: He and his co-founders sold PayPal to eBay for $1.5 billion that July. And Musk was getting ready to launch his next venture. A member of the rocket club introduced Mueller to Musk, and Musk had one question for him: "Can you build something bigger?" Mueller recalled to Popular Mechanics. Ultimately, Mueller never did fire the rocket he was working on in the warehouse (he took it and kept it in his garage, according to the magazine) because he went to work with Musk at the company that would become SpaceX. "Tom had an awesome track record of engine development at TRW," Musk told Popular Mechanics. "I also really liked the fact that he built and tested rocket hardware with his own hands."

Starting SpaceX