Executive Assistant to the Founders

About Sentis

Sentis is capturing the most accurate state of the human body. We build at the intersection of physical AI and healthcare. We are live in US ICUs, piloting with academic medical centers, and scaling from single units to full-hospital deployments. Our ambition is simple: shaping the future of medicine.

The Role

Sentis is raising capital and selling into hospitals at the same time. Our founders, Tim Topper and Christin Seltmann, run dozens of investor, hospital and partner conversations in parallel. Each one ends with a promise: a deck to send, an introduction to make, a date to confirm. A dropped follow-up with an investor or a hospital lead has a real cost.

You make sure that never happens. You own both founders' inboxes, calendars and commitments, so that no meeting is missed, no contact goes cold, and nothing promised in a call or an email is forgotten. You decide what reaches the founders, what you answer yourself, and what can wait.

You own logistics, follow-through and communication flow and check memos and decks for consistency. Handoffs between the two of you have to be clean in both directions.

What You Will Own

Both inboxes. You clear the noise, answer scheduling questions yourself, and sort what needs a founder's reply. Where you can, you attach a draft response, so a founder only has to approve or edit.

Both calendars. You schedule and reschedule across investors, hospital executives, clinicians and candidates. You protect focus time and resolve conflicts between the two calendars before the founders notice them. Before each meeting, the founder knows who is in the room, what was said last time, what we promised and what we want.

Every commitment. After each call and email thread you capture the to-dos and promised follow-ups, and you remind until each one is closed. If that means reminding a founder for the fifth time, you do it without hesitation.

The contact pipeline. You keep the record of every investor, advisor, hospital contact and partner current, with the last touchpoint and the next step. When a promised next step is about to lapse, you handle it or raise it.

Travel and expenses. You plan and book travel to hospital sites and investor meetings across the US, build itineraries that survive a delayed flight, and keep expenses clean.

Events and office logistics. Investor dinners, hospital visits, team offsites and visitors to our San Francisco office run on your planning.

Personal logistics. A limited share of your work is private and family logistics for the founders, such as appointments and travel, where it frees their time for the company.

What This Role Is Not

This is not a reception or ticket-taking job. Nobody will hand you a task list in the morning, and waiting for instructions will not work here. You work right at the forefront of a future shaping startup and do not shy away from making strategic calls. We want someone who is proud of being an excellent Executive Assistant and wants to practice that craft with full access and real authority.

Who You Will Work With

Christin has built companies before. She scaled and sold her previous company, holds a Harvard MBA, and brings years at McKinsey and Siemens. Sentis is her third company. Tim started as a paramedic, where he saw firsthand how missing data can put a patient's life at risk. That experience became Sentis. He went on to AWS, Columbia and Stanford, and ranks number one worldwide at the Excel World Championship.

Sentis is backed by 776, Valor Equity Partners, and Bling Capital, and supported by senior leaders from Merck and Anthropic, alongside experienced healthcare founders and investors.

You Might Be a Fit If

• You have at least five years as an Executive Assistant, including direct support of senior principals under pressure: Senior Partners in top-tier consulting, Managing Directors in investment banking, partners in PE or VC, or founders of a fast-growing startup

• You have supported two or more principals at once and can describe how you handled their conflicting priorities

• You can name specific situations in which you caught something before it went wrong, and what you did about it

• You act before you are asked, make judgment calls on a principal's behalf, and escalate only what needs a decision

• You are persistent and comfortable managing up

• You write precisely and fast. An email you draft in a founder's name can go out unedited

• You stay accurate through long stretches of high volume and daily reprioritization

• You pick up new tools quickly and already use AI assistants for triage, meeting notes and drafting

• You are discreet and trustworthy, because you will see everything: fundraising, hiring, board matters and private matters

• Exposure to fundraising, venture or healthcare is a plus

• You are based in the San Francisco Bay Area or willing to relocate, and authorized to work in the United States without visa sponsorship

The Environment

You will work in person, five days a week, with Tim and Christin in our San Francisco office. We are a small team, and as one of our first hires you will set the standard for how the founders' office runs.

Compensation

$130,000 to $170,000 base

Next Steps

We move fast and aim to complete the process within a few weeks: an intro call, a working session on a realistic Sentis inbox and calendar scenario, a conversation with both founders, and reference calls with principals you have supported.