Who are your most important mentors in science? No, not your PhD advisor who gave you impossibly high standards. Not the department chair who writes your promotion letters.
Your most important mentors are the shadow mentors.
You know what “shadow mentors” are, even if you don’t recognize the term. The professor from a different university who gave you timely career-saving advice at a conference. The scientist who DM'd you after your terrible first talk to say "been there, here's what worked for me." The senior postdoc from another lab who showed you how to troubleshoot that assay when your supervisor was unreachable.
And let's not forget the social media contact you started messaging with after they left a comment on your method-troubleshooting thread. The one who's offered virtual support through three job changes, two rejected manuscripts, and that time you almost quit science. The one who somehow always responds within hours, despite living in a completely different time zone.
Then there's the person who reviewed your fellowship application, job materials, or grant proposal for no benefit to themselves. The one who spent hours marking up your CV, suggesting major revisions to your research statement, and helping you convert academic jargon into something the review committee might understand. The person who had no stake in your success but treated your application like it was their own career on the line.
They didn't have to do that. But they did.
Shadow mentors have no official responsibility for your success. There's no formal relationship. They don't benefit from your achievements. They just…help you.
And they're absolutely crucial to scientific careers.
Why shadow mentors are different.
Official mentors are stuck evaluating you. Even the good ones can't fully escape this dynamic. They're invested in your projects. Your results—good or bad—reflect on them.
Shadow mentors don't have this baggage. They can tell you when your research question is fundamentally flawed without worrying about the grant they wrote around it. They can advise you to switch labs or fields or to pursue your non-science life dreams without feeling personally rejected.
They're not trying to mold you into their scientific image. They're just responding to you as a human.
You probably need more of them.
If your only mentorship comes from people with formal power over your career, you're missing out. Shadow mentors provide perspective from different subfields and institutions. They offer career advice without political complications. You get technical knowledge your mentors lack and connections to entirely different networks. Plus they might be someone safe to vent to about your actual mentor.
The best part? You can have several. Many! A cabinet of shadow mentors addressing different aspects of scientific life.
How to find Shadow Mentors?
Unlike formal mentorships, these relationships rarely start with anyone saying "I'd like to mentor you" or "Will you be my mentor?"
They begin with genuine connection. Ask a thoughtful question after a seminar. Follow up on a helpful conference conversation. Email them saying you loved their last paper (FYI, everyone LOVES this!). Engage with someone's work online. Be vulnerable and open about a challenge you're facing. Show appreciation when someone helps you.
The relationship grows organically from there. Sometimes it's just one pivotal conversation. Other times it evolves into years of periodic check-ins and camping trips with your families.
Being someone's shadow mentor.
You're probably already someone's shadow mentor without realizing it.
That early career researcher you chatted with after your talk? The student from another lab who asked how you got your analysis to work? The colleague who reached out about navigating a difficult workplace situation? You might be the exact right person at the exact right moment to provide perspective they can't get elsewhere.
Take these interactions seriously. Be honest about your experiences, especially the failures. Make introductions when you can. Follow up. You don't need to formally adopt anyone. Just be generous with your knowledge and perspective when the opportunity arises.
The shadow mentorship ecosystem.
Our scientific education systems are designed around hierarchical, formal mentoring. But shadow mentorships create a parallel network of support that's often more responsive, more honest, and more adaptable.
The best scientific communities cultivate both.
So reach out to that researcher whose approach you admire. Answer the email from the early career scientist with a thoughtful question. And thank the shadow mentors who've shaped your own path.
They probably have no idea how much they helped.