On a quiet Wednesday over a secluded New Mexico military base, the silent desert sky was shattered by the thunderous crack of a sonic boom. The source was the “Quarterhorse,” an experimental, uncrewed airplane designed by Hermeus, a defense aviation startup based in El Segundo, California. Flying at 1.21 times the speed of sound—roughly 930 miles per hour—this seven-year-old venture achieved what no other privately developed jet in history ever had. The successful flight was a monumental validation of the team’s engineering prowess, proving their craft could maintain perfect aerodynamic stability through the notoriously turbulent transonic zone. For Hermeus, this test was not just about breaking a speed barrier; it represented a massive relief and a triumphant proof of concept for their newly appointed CEO, Zach Shore. Taking the helm just a week prior, Shore immediately realized the massive stakes of this flight, knowing that proving the airplane’s stability at these high speeds would remove a titanic technical risk from their path forward.
Zach Shore’s transition into the chief executive role, succeeding co-founder AJ Piplica—who remains closely tied to the company as board chairman—could not have had a more cinematic beginning. With co-founder Skyler Shuford stepping into an observer role and two other co-founders having departed, Shore is now tasked with steering this high-flying defense “unicorn” toward its ultimate destination: hypersonic flight, which is defined as traveling at more than five times the speed of sound. Now that Mach 1.21 is secured, the company’s aggressive, milestone-driven roadmap is shifting into overdrive. Hermeus aims to conquer Mach 2 by the end of this year, followed rapidly by Mach 3 in the first half of 2027. True hypersonic capability, which presents unprecedented thermal and structural engineering challenges, remains a target for the coming years. By breaking down the monumental task of hypersonic flight into smaller, rapid-test cycles, Shore and his team are defying the traditional, slow-moving timelines of aerospace giants, proving that agility is just as critical in the boardroom as it is in the upper atmosphere.
The geopolitical landscape has added a layer of intense urgency to Hermeus’s mission, transforming this private engineering feat into a national security priority. Currently, the United States possesses hypersonic missiles, but the military lacks an operational fleet of reusable, hypersonic aircraft—a critical gap as adversaries like China and Russia aggressively advance their own high-speed defense technologies. Recognizing this vulnerability, the Pentagon has stepped up as a vital patron, awarding Hermeus several lucrative development contracts, including a landmark $60 million award back in 2021 to fund the development and testing of the Quarterhorse. This success has reverberated all the way to Washington, where the White House Office of Science and Technology Policy publicly celebrated the milestone on social media as a bold new chapter for American aviation. The achievement also sparked admiration from tech luminary Elon Musk, who responded with a simple “Cool,” while OpenAI’s Sam Altman eagerly shared the announcement, signaling a growing intersection between Silicon Valley’s disruptive capital and the traditional defense sector.
Indeed, Hermeus’s rise is fueled by some of the most prominent and visionary investment figures in tech. Sam Altman initially anchored himself to the company in May 2022 when he led a $100 million Series B funding round, joined by tech billionaire Peter Thiel and his venture capital firm, Founders Fund. The financial momentum continued to surge this past April with a massive $350 million Series C round, propelling Hermeus’s valuation to a staggering $1 billion. Interestingly, Altman is hedging his high-speed aviation bets; he has also backed Hermeus’s primary competitor, Boom Technology, whose piloted XB-1 supersonic aircraft completed its own speed milestone earlier in the year. The core philosophy separating the two companies lies in their target audience and crew structure. While Boom seeks to revive the lost era of luxury commercial supersonic travel—a dream dormant since the retirement of the Concorde in 2003—Hermeus has shifted its primary gaze toward the military, recognizing that the defense sector offers a more immediate, viable, and well-funded path to market.
This pivot to defense was a calculating but highly pragmatic business decision. Supersonic flight is famously ruinous on a commercial balance sheet, as evidenced by the historic Concorde, which burned roughly one ton of fuel per passenger seat during its transatlantic flights—nearly nine times the consumption of modern commercial airliners. By focusing instead on national defense, Hermeus can sidestep the immediate consumer economic barriers while producing aircraft with undeniable military utility, such as conducting rapid intelligence gathering, evading advanced interceptors, and launching surprise tactical operations. Even better, Hermeus is making these jets remarkably cost-effective by utilizing modified, pre-existing jet engines rather than designing powerplants from scratch. Shore projects that their production models will ultimately cost around $50 million—roughly half the price of a modern F-15 fighter jet. This relatively low price tag introduces the concept of “attritability” to high-speed flight, meaning the military could afford to lose some of these uncrewed aircraft in high-threat environments without devastating their budget or risking human lives.
This innovative approach challenges the very foundation of modern military procurement, which has historically relied on aging airframes designed decades ago. Shore points to recent congressional testimonies calling for the purchase of more MQ-9 drones and legacy F-15 fighter jets—platforms that have been operating for twenty and fifty years, respectively—as proof that the current system is desperately recycling outdated solutions to solve modern, overlapping tactical problems. The Quarterhorse offers an elegant alternative: an uncrewed, incredibly fast, and economically viable platform capable of carrying the same heavy payloads as legacy fighters without exposing a pilot to danger. For Shore, navigating this rapid evolution of aviation technology alongside a leadership transition is an exhilarating ride. Reflecting on his first days as CEO, Shore couldn’t help but laugh, noting that starting your tenure with a plane successfully breaking the sound barrier is about as perfect a launchpad as anyone could ask for.
