Felix Huettenbach is a founder, investor, adventurer and YouTuber based in Dubai, born in Germany in 1993, whose career has moved from event production and fitness technology to COVID-19 testing with Sameday Health and, most recently, to renewable-powered data centers with Terranum. Seen together, these ventures share a thread that he himself has pointed to: building and running physical infrastructure at scale.
Huettenbach's first business was not in technology at all. The event production company he started in Munich at 18 paid for his studies, he says, and he later took it to Los Angeles. His degree at the Technical University of Munich combined mechanical engineering and business administration.
After a stint in private equity at Aurelius, where he worked on market entry analysis and financial models, he founded W8X, a fitness-technology company, in 2017. He was an International Scholar at MIT in 2017 and 2018 and taught at the University of Massachusetts Boston from 2018 to 2020.
As Chief of Staff at Quantgene, a company using machine learning to detect cancers early from standard blood samples, Huettenbach was working in diagnostics when COVID-19 arrived. He set up a unit offering COVID-19 testing to companies. Sameday Health followed in 2020, founded because the general public needed fast testing as well.
As co-founder and CEO, Huettenbach opened Sameday Health's first COVID-19 testing site in Venice, Los Angeles, in September 2020. The company offered PCR and rapid tests at walk-in locations, with online booking and digital results. Under his leadership, by April 2022 it operated 55 locations across the United States, 16 of them in Los Angeles County, and employed more than 1,000 people; the company itself gave a figure of 1,200. Looking back, he has described that ramp-up with the phrase "1,000 employees in 100 days".
During his time as CEO, the service range widened at the same pace. A drive-through site at Staples Center began administering vaccines in March 2021, the same month an at-home Concierge Service launched. By November 2021 the company reported more than 1.5 million tests and over 50,000 vaccines administered, and it opened House Calls for testing and wellness services at home, hotel or office. By his own account, Huettenbach is passionate about making healthcare more affordable, transparent and approachable, which matched a house-call offer designed to cost less than the traditional model. In 2022 virtual urgent care consultations followed, with same-day medication delivery through Capsule.
In early 2023, he and the management team agreed that a physician should take over so Sameday Health could widen its medical services. He stepped back that year.
Huettenbach's next step was Terranum, a digital infrastructure company he co-founded and in which he is a partner. Terranum, whose legal entity sits in Dubai's IFZA Business Park, builds data center campuses that run on renewable power. Its planned campus in Prieska, in South Africa's Northern Cape, is sized at 100 MW, designed to run fully off-grid on 100% renewable energy, and aimed at hyperscale demand by 2029. Its partners describe the project as Africa's largest planned data center campus. In March 2026, he and Terranum's Victor Decalf met Prieska's mayor and senior officials, together with the Prieska Power Reserve team, about preliminary approval.
Huettenbach makes the connection between his ventures explicit. He argues that Sameday Health prepared him for data centers because both require three things: operating physical infrastructure across multiple sites, securing official approval, and keeping downtime close to zero. A testing site has to be open when people arrive, and a data center has to stay online around the clock.
He invests today as an angel investor. As an angel investor in founder-led companies, with positions in SpaceX, xAI, Platus and House of Macadamias according to his own disclosures, he states his approach simply: "Execution beats narrative."
Outside his companies, Huettenbach runs a YouTube series of personal challenges, from earning a skydiving license in ten days to returning to a Kung Fu monastery after 20 years. He says he has sought environments where he was far from the best since childhood, a habit that also describes a career that has repeatedly moved into unfamiliar sectors, including healthcare during COVID-19. He also shares updates about his work on LinkedIn.