Here are 18 former employees now leading companies in the space industry.
When PayPal was acquired by eBay in 2002, few people realized they were witnessing the beginning of one of the most influential entrepreneurial networks in modern business history.
Former PayPal employees went on to build companies such as Tesla, LinkedIn, Palantir, YouTube, Yelp, and many others. The group eventually became known as the “PayPal Mafia,” a network of founders, operators, and investors who shaped the next era of Silicon Valley.
Now, many investors believe the SpaceX IPO could trigger a similar wave across the space and deep-tech industries.
With SpaceX becoming one of the most valuable companies in history and creating thousands of employee millionaires, attention is rapidly shifting toward a growing group often referred to as the “SpaceX Mafia”. Former engineers, executives, and operators who helped build SpaceX are now leading startups across aerospace, defense, satellite technology, manufacturing software, healthcare, artificial intelligence, energy, and robotics.
The question is no longer whether SpaceX changed the space industry.
The question is whether its former employees will build the next generation of industry-defining companies.
Why SpaceX Is Different
Most successful companies create products.
SpaceX created an ecosystem.
Over two decades, the company became a training ground for engineers, operators, and leaders who learned how to solve extremely difficult problems under intense pressure. Employees were expected to move quickly, take ownership, challenge assumptions, and build hardware at a pace that traditional aerospace companies rarely attempted.
That culture produced more than rockets.
It produced founders.
Many former SpaceX employees describe their experience as an engineering bootcamp where responsibility arrived early, and expectations remained exceptionally high.
As a result, when they left to start companies of their own, they carried with them a mindset focused on execution, speed, and first-principles thinking.
Why the IPO Matters
The significance of the SpaceX IPO extends beyond the company itself.
Public listings often create liquidity events that transform employees into investors. Thousands of current and former SpaceX employees now hold stock worth substantially more than before the IPO.
Historically, these moments tend to accelerate startup formation because newly wealthy employees begin funding founders they know and trust.
The same pattern helped fuel Silicon Valley after PayPal’s acquisition.
According to investors and former employees, the SpaceX IPO could unlock:
- More angel investment from former employees.
- Greater venture capital interest in space startups.
- Increased public attention toward deep-tech businesses.
- More experienced operators are leaving to launch new companies.
- Stronger recruiting pipelines across aerospace and defense.
For early-stage startups, access to capital often matters as much as technology. The IPO increases the probability that more funding flows into the broader ecosystem.
The Rise of the SpaceX Mafia
Several former SpaceX employees have already built companies valued in the hundreds of millions of dollars.
Some are focused on satellites and spacecraft. Others are applying lessons learned at SpaceX to industries far beyond aerospace.
Impulse Space
Founded by former SpaceX propulsion chief Tom Mueller, Impulse Space develops spacecraft designed to move satellites and cargo between different orbits.
Mueller spent nearly two decades helping build SpaceX’s propulsion systems and is widely regarded as one of the key architects behind the company’s rocket technology.
Today, Impulse Space has emerged as one of the most closely watched companies in orbital transportation.
Apex Space
Apex Space is tackling a problem that has long slowed the satellite industry: manufacturing.
Instead of building custom spacecraft one at a time, Apex focuses on mass-producing satellite platforms that can be adapted for different missions.
The company has attracted significant venture funding and rapidly expanded its workforce, positioning itself as a major player in the growing satellite economy.
K2 Space
Founded by brothers Neel and Karan Kunjur, K2 Space is developing large satellites capable of operating across multiple orbits.
The company believes that larger satellites can deliver better economics and broader capabilities than many existing systems.
Its rapid fundraising success highlights investor confidence in founders who previously worked on SpaceX’s Dragon program and avionics systems.
Varda Space Industries
One of the most ambitious startups in the group, Varda Space, is building manufacturing facilities in orbit.
The company uses microgravity environments to produce materials and pharmaceuticals that are difficult or impossible to manufacture on Earth.
The concept sounds futuristic, but Varda has already demonstrated progress that suggests space-based manufacturing could become a real commercial industry.
Not All SpaceX Alumni Are Building Space Companies
One of the most interesting developments is that many former SpaceX employees are applying aerospace lessons to completely different sectors.
Levels
Founded by former SpaceX engineer Josh Clemente, Levels helps consumers track metabolic health through continuous glucose monitoring and personalized insights.
The company operates in health technology rather than aerospace, yet its culture reflects many of the principles associated with SpaceX: data-driven decision-making, rapid iteration, and customer-focused innovation.
PicnicHealth
PicnicHealth helps patients organize medical records while supporting research through healthcare data.
The company demonstrates how engineering discipline learned in aerospace can be applied to highly regulated industries facing complex operational challenges.
Plantd
Plantd is focused on sustainable building materials.
Founded by former SpaceX employees Nathan Silvernail and Huade Tan, the company transforms perennial grasses into construction materials designed to compete with traditional wood products while reducing environmental impact.
The Bigger Opportunity
The most important takeaway may not be any individual startup.
It may be the network itself.
The PayPal Mafia became influential because its members repeatedly worked together, invested in each other, shared talent, and created opportunities across multiple generations of companies.
The SpaceX Mafia appears to be developing similar characteristics.
Founders frequently recruit former colleagues, investors actively seek entrepreneurs with SpaceX experience, and employees continue moving between companies within the ecosystem.
That creates a powerful flywheel where knowledge, capital, and talent circulate faster than they would in isolation.
What Happens Next
The space industry today looks very different from the one SpaceX entered two decades ago.
Launch costs have fallen dramatically. Private capital is more available. Governments increasingly rely on commercial providers. New markets involving satellites, communications, defense, Earth observation, and in-space manufacturing continue to emerge.
Against that backdrop, the SpaceX IPO may become more than a financial milestone.
It could become the event that accelerates an entirely new generation of founders.
Just as PayPal produced some of the most influential entrepreneurs of the internet era, SpaceX may ultimately be remembered not only for transforming access to space but also for producing the entrepreneurs who shape the next wave of deep-tech innovation.
Miguel J. Rodríguez Carrillo / AFP
Source: BI
