Jenni Ellis

The person the founder calls first.

Every fast-moving startup has a person whose name never appears on the product roadmap but without whom the roadmap would quietly collapse. At CompScience, that person is Jenni Ellis.

Since March 2025, Jenni Ellis has been Executive Assistant to the Chief Executive Officer at CompScience, a San Francisco company building AI control systems for workplace risk. She reports directly to founder and CEO Josh Butler. On the org chart, she has zero direct reports. In practice, the whole rhythm of an executive's week passes through her hands - the calendar, the travel, the board prep, the offsites, the thousand small frictions that, left unmanaged, become the reason a startup misses a quarter.

CompScience is not a quiet place to do this work. The company has set itself a deadline most firms would never dare to write down: prevent one million workplace injuries by 2035. It uses computer vision and AI to watch how work actually happens on factory floors, construction sites, and warehouses, then flags the hazards before they turn into claims. It has raised $43.6 million, most recently a Series B closed in early 2025, and earned a spot on CB Insights' Insurtech 50. Growth like that is exciting on a press release and exhausting in a calendar. Somebody has to absorb the chaos. That somebody is Jenni Ellis.

An operator's resume, not a passenger's

What makes Ellis interesting is not the current title. It is the trail behind it. Before CompScience, she held operations, office-management, and executive-support roles at a run of companies that read like a Bay Area highlight reel: Replicate, the AI model platform; DoorDash and Instacart, the two giants of on-demand delivery; and Dropbox, the file-sync company that helped define the modern SaaS era.

That is not a random walk. It is a pattern. Ellis keeps turning up at companies in the exact moment they go from clever idea to operational machine. The work of an executive assistant at a hyper-growth startup is less about scheduling and more about systems - deciding what the principal should never have to think about, and then making sure they never have to. She has done it at delivery, at storage, at AI. Now she does it at safety.

The skill set hiding behind the title

Strip away the job label and the toolkit is broad. Ellis's listed strengths run from executive administration and office administration to event planning, technical recruiting, and project management. That recruiting line matters. An EA who can also read a candidate, run an interview loop, and stand up an offsite is not support staff - she is connective tissue. At a startup with 84 employees scaling across multiple industries, the person who can do five jobs competently is worth more than five people who can each do one.

Colleagues describe her as a gracious and thorough teacher who loves seeing other members of her team succeed, and a natural leader who keeps tabs on the day-to-day flow of a business. Read that twice. The phrase is not "follows instructions well." It is "keeps tabs on the day-to-day flow of a business." That is a chief-of-staff sentence wearing an executive-assistant nametag.

From Wichita Falls to the Bay

The roots are Texan. Ellis earned a Bachelor of Applied Arts and Sciences in Education and Humanities from Midwestern State University between 2005 and 2007. Her listed studies don't stop there - they span four institutions across two continents, with coursework tied to NYU, Baylor, and Oxford. An education built around humanities and teaching is, on reflection, exactly the wrong background for a robot and exactly the right one for the job she actually does: managing humans, anticipating needs, translating between people who are too busy to translate for themselves.

There is a small clue to her story hidden in plain sight. Her professional handle is jennikthomas - Thomas being her name before she became Ellis. It is the kind of detail that survives every job change, the digital equivalent of a maiden-name monogram on the luggage. She has carried it from company to company while the title on the door kept changing.

Why the back office is the front line

It is tempting to treat the executive assistant as scenery. That instinct is wrong, and CompScience is the proof. A company promising to prevent a million injuries cannot afford a CEO who is buried in logistics instead of leading. The mission lives or dies on the founder's focus, and the founder's focus is, day to day, manufactured by the person who guards it. Ellis is not adjacent to the mission. She is load-bearing.

The companies she has worked for understood this. So does CompScience. The most valuable people in a scaling startup are rarely the ones with the loudest titles. They are the ones who make everyone else's title possible. Jenni Ellis has spent a career being that person, quietly, at one defining company after another - and now she is doing it for a team trying to make work itself safer.

The company she keeps moving

To understand the job, look at the company. CompScience sits at an unusual intersection: it is at once an AI company, a computer-vision shop, and a commercial-insurance carrier. Its products carry names like Active Risk Management, Safe Work Plan, and SafetyPulse. The pitch is deceptively simple. Workplaces already have cameras. CompScience teaches those cameras to notice the near-misses - the unguarded ladder, the blind corner, the lifting posture that will eventually wreck a back - and turns that footage into hazard hotspots and alerts before anyone gets hurt. The founding team was assembled from inside the insurance establishment: veterans of Liberty Mutual, The Hartford, Chubb, AIG, Zurich, and Metromile. It is the rare startup that wants to disrupt an industry by hiring the people who already run it.

A company like that lives in two worlds at once - the move-fast cadence of a venture-backed AI startup and the careful, regulated rhythm of an insurance carrier serving construction, manufacturing, warehousing, and logistics clients. Both worlds run on schedules, documents, and follow-through. The person who keeps those plates spinning for the CEO has to be fluent in each. Ellis's mixed background - delivery logistics at DoorDash and Instacart, software discipline at Dropbox, AI velocity at Replicate - reads almost like a custom-built apprenticeship for exactly this hybrid.

The discipline of the invisible

There is a particular kind of professional pride in work that is only noticed when it goes wrong. A flawless offsite, a board deck that arrives early, a CEO who walks into every meeting already prepared - none of it generates applause, because the whole point is that it looks effortless. The executive assistant who is good at the job is, by design, the least visible person in the building and the one whose absence would be felt first.

Ellis has built a career inside that paradox, and she appears to enjoy it. The descriptions that follow her are not the language of someone grinding through a job they tolerate. Vivacious. Enthusiastic. A natural leader. Someone who loves watching her teammates succeed. That last trait is the tell of a true operator: the satisfaction comes not from personal spotlight but from the smooth functioning of everyone around her. In an industry obsessed with founders and engineers, she represents the other half of how things actually get built - the operational layer that turns ambition into a company that opens for business every Monday.

CompScience has given itself nine years to keep a very large promise. A million prevented injuries is not a tagline you can fake your way toward; it requires a company that executes relentlessly, week after week, while the cameras keep rolling and the clients keep signing. Behind that execution sits a founder, and behind the founder sits the person who makes sure the founder's time is spent on the mission and nothing else. For now, that person is Jenni Ellis - and the quiet, unglamorous reliability she brings is exactly the kind of thing that, multiplied across nine years, adds up to a number that big.