She found a novel enzyme in graduate school, then spent the next decade turning that kind of precision into diagnostics ordinary people can afford. Simple HealthKit is the result - and its founder never separates the science from the reason for doing it.
Somewhere in a University of California, Santa Barbara laboratory around 2010, a graduate student named Sheena Menezes was staring at a protein nobody had described before. Using computational bioinformatics, she had turned up a novel tRNA methylase - an enzyme that quietly edits the machinery of protein synthesis. It was the kind of discovery that earns a PhD and, for many people, a comfortable academic career. She took the discovery and did something else with it.
The something else is Simple HealthKit, the Milpitas, California company where she is co-founder and CEO. It sells at-home diagnostic tests, then connects the results to treatment and follow-up care. On paper it reads like a dozen other digital health startups. Spend a little time with how Menezes talks about it and the resemblance falls apart. She keeps circling back to a single idea: that the science only matters if it reaches the people who usually get left out.
Healthcare is vulnerable, precious. It's your health; it's your life. What we build can really impact people's lives.
Sheena Menezes
Menezes was born and raised in Kuwait, with Indian-Portuguese roots. She was a child during the Gulf War, which gave her an early, unwanted lesson in how quickly stability can evaporate. Her family holidays were not the usual kind. They were often spent on social-service projects, working with young girls at orphanages in India. Years later, she would celebrate her own daughter's first birthday at a shelter for girls rescued from the streets.
That detail says a lot about how she operates. She does not keep the mission in one drawer and the personal life in another. The two are the same drawer. When she describes what pulled her toward healthcare, she points back to those early experiences of watching some communities get world-class care and others get almost nothing.
As a refugee and an immigrant, I learned from an early age about the disparities in healthcare in different communities around the world.
Sheena Menezes
Her resume does not run in a straight line. She started in computer science, doing undergraduate research before moving into a biochemistry PhD at UC Santa Barbara. On campus she served as president of the International Students group. The computational skills she picked up early were exactly what let her find that novel enzyme later - she used bioinformatics to predict a protein's function and then confirmed it at the bench.
After graduate school she went into industry, landing at Scanadu as Director of In Vitro Diagnostics and Senior Principal Scientist. There she led a urinalysis product from proof of concept all the way to 510(k) clearance from the FDA. That is not a glamorous sentence, but it is an important one: getting a diagnostic product through regulatory clearance is where a lot of good science quietly dies. Menezes learned how to make it survive.
Figures compiled from public company statements and press releases.
Simple HealthKit was founded around 2020 on a plain premise: accurate, affordable, accessible diagnostics for people from all walks of life. What makes the company more than a testing brand is that it owns the full chain. It runs a CAP-accredited, CLIA-certified lab licensed in all 50 states, and it wraps telehealth care and prescriptions around the tests. A result does not just come back as a number - it comes back attached to a next step.
The company raised $8 million in 2023 and used it to widen its portfolio. In June that year it put at-home kits on Walmart.com, a distribution choice that tells you something about who Menezes is trying to reach. Walmart is how you get to rural America and the places sometimes called health deserts, not the coastal early-adopter crowd that most health startups chase first.
World-class care is a right for everyone, not a privilege.
Sheena Menezes
Menezes has spent stretches of her career as the only woman, or the only woman of color, at the leadership table. Rather than treat that as a fixed condition, she built a company with more chairs. Simple HealthKit's workforce is roughly 70% women and 80% people of color - numbers that do not happen by accident in Silicon Valley. She talks about wanting a "professional family," and about developing the next generation of diverse leaders as an explicit goal, not a nice-to-have.
Workforce composition as described by the company.
Her view of leadership is refreshingly unheroic. She does not talk like a founder who thinks the company runs on her willpower.
You need smartest, kindest people executing together. It's never one person.
Sheena Menezes
"Women shouldn't hold themselves back. Trust yourself and attempt it - don't say 'no' upfront." It is the kind of line that sounds like a poster until you remember she is someone who said yes to building a diagnostics lab licensed in every state.
Menezes lives in Silicon Valley with her two young children. When she is not running the company, there is a decent chance she is running a science experiment at the kitchen table, because both kids have caught the STEM bug. She talks with her hands, and has noted, with some amusement, that the gesture carries different meanings in different cultures - a small immigrant's footnote to an otherwise very American founder story.
The through-line in all of it is that she wants the passion and the skill set to be the same thing. She has said as much, framing her own contentment as a kind of alignment problem she managed to solve.
Can you combine passion with skillset? That's why I'm happy doing this.
Sheena Menezes
It would be easy to package Menezes as a tidy success narrative - refugee child becomes celebrated CEO. She resists that flattening. The enzyme, the FDA clearance, the Walmart shelf, the 70/80 team, the shelter birthday party: they are not separate chapters so much as one continuous argument that good healthcare should not depend on where you happened to be born. She is still making that argument, one test at a time.