What happens when a corporate leader decides to stop climbing and start catalyzing? For Ellin Sidell, the answer is The Sidell Method—a leadership consultancy that blends neuroscience, coaching, and practical influence.
With roots at global firms like Microsoft and Costco, Sidell left behind stability to chase something more elusive: meaningful impact.
“My soul came alive mentoring people,” she says. “So I built a business around it.”
Influence Without a Title
While running a mentorship program at Costco, Sidell discovered that influence without authority wasn’t just a survival tool—it was a performance lever. She saw firsthand how the right guidance could spark massive growth across teams and departments.
“I wasn’t just managing a program. I was coaching, building leaders, and shifting culture.”
From Teaching to Doing
Starting her own firm came with challenges: technology, business development, and sales. But instead of outsourcing, Sidell leaned in, applying Tiny Habits to build foundational skills. She joined the Cialdini Institute and became fluent in behavioral science.
“Influence is a teachable skill,” she explains. “And it changes everything.”
When the Book Stays Closed
A pivotal moment came with a book left unfinished—Necessary Endings. She realized she couldn’t finish it because it symbolized something she was avoiding: her departure from corporate.
Once she accepted that, everything clicked.
“I stopped waiting and started building.”
Entrepreneurial Advice That Sticks
Her advice to others?
- Know your strengths
- Dream vividly
- Surround yourself with mentors
- Don’t aim directly at success—it follows purpose
She credits Viktor Frankl with capturing this best:
“Success cannot be pursued; it must ensue… as the side effect of one’s dedication to a cause greater than oneself.”
Energy From Within
Sidell maintains balance with boundaries: no weekends, strength-based work only, and selective client alignment. “Saying no is part of staying energized,” she says.
Her secret weapon? Mental fitness and neuroscience-based tools that she also teaches to clients.
What’s Next?
Up next: a mentorship program for SHRM, and global service work through Rotary, helping fund clean water initiatives around the world.
“Leadership is not just about results—it’s about responsibility.”
Explore More:
🔗 Ellin Sidell’s Press Kit
🔗 The Sidell Method