Sierra

Collett Coaching

Create the kind of self the future needs.

Working with Changemakers to develop their leadership skills and presence through a personalized leadership coaching experience.

Built for clarity, resilience, and growth, just like the change you want to create in the world.

You're expected to lead through complexity you've never seen before.

Develop the resilience you need to confidently impact your work & community amidst a world that seems to keep spinning faster.

Here, we build the kind of leader that refuses to fade into the chaos.

ICF CERTIFIED

Associate Coach

BROWN UNIVERSITY

Certified Education

GLOBAL REACH

Clients from 25+ countries

4.85/5 RATING

From Over 60 Clients

Hey, I'm Sierra.

I'm an ICF certified Leadership & Performance Coach trained at Brown University currently fascinated with the mind, systems thinking, and social transformation.

I've been running a global leadership development program for emerging social change leaders in over 80 countries. Now I also coach as a way to discover how you can create clarity, build resilience, and enjoy showing up in your spaces of impact with confidence.

Anatomy of Change

Every coaching session is a sensemaking frame for your leadership journey. Grow, adapt, and let your inner development spill into unexpected impact that keeps transforming the world around you.

"I was having problems with my relations with older, more experienced colleagues. Sierra created a very safe, calm, non-judgmental space, allowing me to see myself. I now have my own tools, adjusted to my needs & personality, tailor-made and field-tested, that continue to develop my growth!"

Marta Skierkowska

Vice President, Poland

"Leadership Coaching with Sierra was transformative. I acquired essential leadership skills, such as conflict resolution, decision-making, and strategic thinking, which equipped me to handle my new responsibilities more effectively."

Nabatte Proscovia

Head of Public Relations and Marketing, Uganda

"Before the leadership coaching journey, I struggled deeply with self-doubt. Working with Sierra was like peeling away the layers of an onion—slow, deliberate, and insightful. The process unfolded almost organically. Now, I feel a deep sense of confidence, shifting focus from obstacles to my potential, which has been transformative."

Abhishek Tiwary

UN GCPEA Steering Committee Fellow, India

"Sierra's coaching helped me transform my cloud of thoughts into actionable plans. By using metaphors, we were able to break down complex issues like time management and conflict resolution. This newfound clarity shifted my anxiety to professional confidence, and equipped me with an action plan to take my learnings to the next step."

Afnan Mohammed

Senior Associate, Pakistan

"I was having problems with my relations with older, more experienced colleagues. Sierra created a very safe, calm, non-judgmental space, allowing me to see myself. I now have my own tools, adjusted to my needs & personality, tailor-made and field-tested, that continue to develop my growth!"

Marta Skierkowska

Vice President, Poland

"Leadership Coaching with Sierra was transformative. I acquired essential leadership skills, such as conflict resolution, decision-making, and strategic thinking, which equipped me to handle my new responsibilities more effectively."

Nabatte Proscovia

Head of Public Relations and Marketing, Uganda

"Before the leadership coaching journey, I struggled deeply with self-doubt. Working with Sierra was like peeling away the layers of an onion—slow, deliberate, and insightful. The process unfolded almost organically. Now, I feel a deep sense of confidence, shifting focus from obstacles to my potential, which has been transformative."

Abhishek Tiwary

UN GCPEA Steering Committee Fellow, India

"Sierra's coaching helped me transform my cloud of thoughts into actionable plans. By using metaphors, we were able to break down complex issues like time management and conflict resolution. This newfound clarity shifted my anxiety to professional confidence, and equipped me with an action plan to take my learnings to the next step."

Afnan Mohammed

Senior Associate, Pakistan