Professor as co-founder, adviser or CSO: designing the role

1. Core idea and who it's for#

Most deeptech spinouts have a professor at the centre. Usually they are the PI whose lab produced the result, and often they are the person whose reputation gets the first meeting with investors. Almost always, they are also someone who will keep their university job. How you design their role is one of the first structural decisions in the company, and fixing it later costs a lot. The main principle is this: the role and the equity should match what the professor will actually do from now on, not what they did in the past. It also has to fit within what their university allows.

There are five common shapes, in falling order of commitment:

• Full-time co-founder (CEO or CTO). They leave or take long leave. This is rare for tenured faculty, but it changes how investors see the company.
• Part-time executive (CSO or chief scientist). A real operating role, but capped by university outside-activity rules, often at about one day a week.
• Scientific co-founder. Founder-level equity and a title. They are not on the payroll as an executive. Their job is strategy, recruiting, reputation and a technical veto on the roadmap.
• SAB chair or member. Advisory. Paid in a small grant of options and sometimes cash. Consultant or adviser. A contract for defined hours. Small equity or a fee.

Who this is for: student and postdoc founders deciding what to offer their PI; professors deciding how involved to be; and outside CEOs joining a lab's spinout who need to agree the relationship before the first term sheet forces the question.

The failure mode to design against: a professor with a large founder stake, a CSO title and a vague one-day-a-week commitment. The full-time team does the work. Investors discount the cap table. Then the company has an awkward conversation two years in, when the professor's time and the company's needs have drifted apart. Every section below is about avoiding that.

2. Evidence and benchmarks#

Investors want someone full-time, and it doesn't have to be the professor. In Y Combinator's guide to spinning out research, Jared Friedman argues that a spinout has little chance unless someone who worked on the original research leaves to build it. He

says the ideal is two or more lab members leaving together, one of whom becomes CEO. Those who stay at the university become "academic" or "scientific" co-founders. They are useful, but secondary to the full-time team (YC). An Xconomy piece by a universitystartup practitioner notes that senior faculty rarely leave their posts. Most become parttime scientific advisers, typically under 20% of their time (Xconomy).

Equity benchmarks for a professor who stays in academia:

The Pillar framework is useful because it separates creating the invention from building the company . Creators share a fixed slice. Inside that slice, a professor who drove the invention might get about half, while one who mainly ran the lab might get no more than each student who did the work (Pillar VC). A student who also joins as an executive gets both, so they can end up owning more than the professor. That is intended.

Time caps are real and usually around one day a week. At US research universities, outside activity is generally capped at about one day in seven, averaged over a term. Examples:

• Yale: one day per seven-day week on average.
• Columbia: outside work up to one day a week.
• Cornell: paid consulting for the equivalent of one day a week.
• Pitt: up to one day per week on average.

Many also require disclosure once outside pay passes $5,000 in 12 months, or whenever the pay is equity (Oregon). India's NISP 2019 uses a 20%-of-office-time cap for faculty working in an advisory or consulting role (section 4).

An executive role pays more, and so does staying close to the company. David Latchman co-founded BioVex. He turned down the full-time CSO job to stay at UCL and served as a non-executive director and consultant. Amgen later bought the company for up to $1bn. He notes that an executive role "will certainly maximise your earnings potential," because investors reward people they see as essential (Times Higher Education). His founder

stake had been diluted across many rounds. The lesson is not to avoid part-time roles. It is that ongoing, visible contribution earns refresh grants, and a one-off founder stake does not.

3. Method: designing the role#

Step 1. Read the rules before you negotiate. Get the professor's outside-activity policy, the conflict-of-interest policy and any startup policy. From them, find out:

• the time cap;
• whether they can hold an executive title;
• whether they can hold equity while being PI on sponsored research with the company;
• whether students in their lab can work for the company;
• what must be disclosed.

These set the outer limits of every option. A CSO title the university won't approve is worse than no title.

Step 2. Write down the actual job before choosing a title. List what the company needs from the professor in the next 24 months, with hours. Typical items:

• the scientific roadmap and go/no-go calls on experiments;
• recruiting the first scientists;
• investor and partner meetings where their credibility matters;
• grant applications;
• SAB leadership.

If the total is about 4–8 hours a week, the role is scientific co-founder or part-time CSO. If it is a few days a quarter, the role is adviser or SAB chair.

Step 3. Match equity to that job, using the benchmarks. Treat the creator share (the reward for inventing) and the builder share (the reward for future work) as separate. Size the creator share from the Pillar-style split. Size the builder share from the hours in step 2. Then check the total against the roughly 10% ceiling investors expect for a founder who stays in academia.

Step 4. Vest all of it, with leaver terms. The professor's founder shares should vest like everyone else's, typically over 4 years with a 1-year cliff, implemented as reverse vesting on shares already issued. Add good-leaver and bad-leaver terms. Also define what happens if their time falls below the agreed minimum. One fair way is to switch them from executive to adviser status, so that unvested shares stop vesting or vest at a lower rate. Agree this on day one, while everyone is still friendly.

Step 5. Separate decision rights from the title. Write down what the professor decides alone (scientific direction within the agreed budget), what they advise on (hiring scientists, the platform roadmap), and what they have no say in (commercial strategy, fundraising terms). It is safer to give them a board observer seat or SAB chair than a voting board seat. Voting board seats at pre-seed are scarce and should go to full-time founders and lead investors.

Step 6. Build the conflict firewall. The professor should not:

• negotiate the licence for the company;
• supervise students on company-funded work without a disclosed management plan;
• steer lab resources toward the company.

Put sponsored research agreements and student roles through the university's conflict process (see 2.13 and 2.14).

Worked example (illustrative)#

Two postdocs, Asha and Ben, are spinning out a solid-state electrolyte from Professor Rao's lab. Both will go full-time: Asha as CEO, Ben as CTO. Rao stays tenured, and her university caps outside work at one day a week. She will give about half a day a week: roadmap reviews, two investor meetings a month during the raise, and help recruiting the first two PhD hires.

• Creator slice. Rao directed the core idea, and Ben ran most of the experiments. Out of a notional 20% creator share, they agree: Rao 9%, Ben 6%, Asha 5%.
• Builder share. Asha and Ben split the 80% builder share equally, 37.5% each, after reserving 5% for an unissued pool before the seed round. Rao gets no builder share. Her half-day a week is recognised with a part-time CSO title and a cash consulting fee once the company raises.
• Result before the seed round:

Rao's 9% is inside the academic co-founder norm.

• Terms. Everyone's shares vest over 4 years with a 1-year cliff. Rao's agreement says that if her commitment falls below 2 hours a week for two quarters in a row, she becomes an adviser and her unvested shares stop vesting. She is SAB chair and board observer, not a director.
• Two years later. The company needs her more for a platform expansion. The board gives her a 1% refresh grant, so ongoing contribution is rewarded the way Latchman describes.

In this example the university's own stake comes from the licence (see 2.07 and 2.10) and is outside the founders' split shown.

4. Investor view, evolution over time, and India / US / UK differences#

How investors read the professor's role. At pre-seed, a well-known professor as scientific co-founder helps: it improves credibility, speeds up hiring and opens partner doors. Investors' worries are about structure, not the person:

• unvested founder equity held by someone part-time;
• a professor CEO with no full-time operator;
• unclear authority between the CSO and the CTO;
• a lab that might keep competing with the company for the same results.

YC's advice is blunt: raising money first and leaving the university afterwards usually doesn't work (YC). A clean answer to "who is full-time, and what exactly does the professor do?" removes most of these worries.

Plan for how the role changes. The professor's role should step down gradually as the company grows:

• Pre-seed to seed: scientific co-founder or part-time CSO, closely involved in the roadmap.
• Series A: a full-time CSO or VP R&D is usually hired. The professor becomes SAB chair or chief scientific adviser.
• Later: SAB member, plus help on strategy and recruiting.

Write this path into the founder agreement, so that the transition at Series A is something everyone agreed in advance and not a demotion.

India#

• The NISP framework is permissive. The Ministry of Education's National Innovation and Startup Policy 2019 encourages institutions to let faculty take a semester or a year of sabbatical or unpaid leave to work on a startup. It sets no limit on faculty

shareholding, provided the faculty member spends no more than 20% of office time on the startup in an advisory or consulting role (NISP summary deck). Where faculty draw an institute salary, the institute's own stake is limited to 20% of the faculty member's shares or 9.5% of the company, whichever is lower. NISP is guidance, and each institute adopts its own version.

• Check the specific institute. IITs, IISc and CSIR labs each have their own facultystartup rules. These cover leave, whether faculty can serve as directors, and use of institute facilities. Ask the incubator or the dean of R&D for the current version.
• Government-employee rules may apply to faculty at central institutions, especially for paid directorships. Get any board role approved in writing.
• Separation of work. NISP says faculty must clearly separate their ongoing institute research from the startup's work. Put this into the lab-use and sponsored-research arrangements (2.14).

US#

• The one-day-in-seven cap is standard at research universities, and executive titles often need a dean's approval. Some institutions prohibit faculty from holding linemanagement roles in a startup while employed.
• Federally funded investigators must disclose significant financial interests under PHS or NIH and NSF conflict rules. Equity in a private startup usually triggers disclosure and a management plan if the company is related to their funded research.
• Sponsored research from the company into the professor's own lab is the main conflict risk. Many universities ban it or require a management plan with an independent monitor.
• 83(b) elections on restricted founder stock apply to professors too. If they file within 30 days of the grant, later vesting is not taxed as income (see 3.06).

UK#

• Academics usually keep their posts and work as directors or consultants, within the university's consultancy allowance and with its approval. Allowances vary by institution and are usually set as days per year. Check the HR or researchcommercialisation policy.
• The university often holds equity directly from the spinout deal, as well as the academics. The Independent Review of University Spin-out Companies pushed for founder-friendly terms and standard templates. The USIT guide gives benchmark stakes (see 2.07 and 2.10).
• EMI options can reward an academic's ongoing work only if they meet the workingtime test: 25 hours a week, or 75% of their working time. Most part-time academics fail it. Use unapproved options, or a growth-share structure, with tax advice.

5. Scripts, mistakes, related playbooks and sources#

Scripts#

A student founder raising the role with their PI:

"We want you in this company in a way that works with your university rules and that investors will back. Ben and I will both go full-time. We'd like you as scientific cofounder and SAB chair, with a stake that reflects your part in the invention. It would vest on the same schedule as ours. Could we go through your outside-activity policy together, then agree on hours and what you'd lead?"

A professor who wants a bigger stake:

"Your contribution to the science is the reason this exists. The difficulty is that investors price the cap table on who builds the company from here. An academic cofounder holding more than about 10% is a flag they raise every time. We'd rather set you at a level they'll accept, and add refresh grants as your involvement grows, so your stake follows what you actually do."

An outside CEO setting boundaries:

"You lead the science. Within the agreed R&D budget, the roadmap is yours. Fundraising terms and commercial strategy sit with me and the board. I'll bring you into every investor meeting where the science is being judged."

Common mistakes#

1. Rewarding the past. A professor gets a large founder stake for the years spent creating the invention, and nothing is left for the people who will build the company.
2. Vague time. "About a day a week" with no list of what that day is for. Agree hours and specific deliverables.
3. No vesting for the professor, because "they're tenured, they're not going anywhere." Their commitment can still disappear.
4. A professor CEO with nobody full-time. Most VCs won't fund it (YC).
5. A board seat by default. Give a board observer seat or SAB chair, and keep pre-seed board seats for full-time founders and investors.
6. Ignoring conflict rules. The company funds the professor's lab, or employs their students, without a disclosed management plan, and the university forces it to unwind later.
7. Overlapping titles. A CSO and a CTO with overlapping remits. Define who owns platform decisions and who owns product engineering (3.08).

Related playbooks#

• 3.04 Bringing in a business CEO for a scientist founder
• 3.05 Frameworks for splitting founder equity
• 3.06 Founder vesting, cliffs and acceleration
• 3.07 Founder agreements
• 3.08 Assigning titles
• 2.13 Students and postdocs as founders
• 2.14 Using university labs after spinout
• 5.16 Advisor equity norms
• 20.04 Scientific advisory boards

Sources#

• Jared Friedman, "How to spin your scientific research out of a university and into a startup," Y Combinator
• What to Expect When You're Spinning Out a Deep Tech, Pillar VC
• CEOs and Scientific Founders: Tips for a Long and Successful Marriage, Xconomy
• David Latchman, "Four things to know about venture capital-funded spin-offs," Times Higher Education
• National Innovation and Startup Policy 2019, summary deck, MoE Innovation Cell and AICTE
• University outside-activity policies:
• Yale
• Columbia
• Cornell
• Pitt
• Oregon

The worked example is illustrative, and its numbers are not a recommendation for any specific company. University rules change, so check the current policy at the professor's own institution. Last checked November 2026.