Leaders, who do you
turn to when everyone
turns to you?

The weight of decisions, expectations, and outcomes feels relentless as the pace of change accelerates and the global business environment grows more complex.

The answers don’t have to come from you alone. Let’s find them together.

Start the conversation

As your Executive Coach, I can be your:

Advisor

to guide you through high-stakes decisions.

Sounding Board

to execute bold ideas with confidence.

Partner

to help you align your focus and lead with impact.

Strategist

to rally stakeholder buy-in to implement your vision.

“Leaders already possess the ability to overcome their greatest challenges. My role is to provide the space, tools, and perspective they need to unlock solutions and lead with clarity and conviction.”

—
Madelyn Sierra, Executive Coach & Trusted Advisor

As a Harvard Business School graduate with over 20 years of executive coaching experience, I partner with:

Organizations to develop future leadership, align teams, and drive transformative results. Learn more

Individual leaders to help them gain clarity, build resilience, and lead with confidence. Learn more

I’ve worked with leaders from Fortune 100 companies, professional service firms, private equity-owned businesses, and mission-driven organizations.

I coach select clients, ensuring every engagement is deeply personalized and impactful. Together, we’ll tackle your challenges with precision and develop strategies that generate measurable business results. Read my bio.

Client feedback

“When I was brought in to help start a new company, there wasn’t really time or space to engage in the creative process as the company was growing so fast. Madelyn was able to create that space and be that sounding board so I could work through my ideas and come back with concrete proposals and recommendations.

She was able to help me compound several different problems and find a way to solve for all of them at the same time.”

- C-SUITE EXECUTIVE

“My company’s CEO came to me and said, ‘I’m struggling with the senior team. Who can I let loose on this group of hard-hitters?’ And I said, ‘Madelyn.’ I’ve never paused about recommending her, because she is that good. She relates to a range of leaders, regardless of their function, challenges and strengths.”

- GLOBAL CHRO
Private equity-owned company

Select Clients

Abbott

ADP

Anheuser-Busch

Brown-Forman

Cardinal Health

Graybar

Harvard Business School

Havas Media

IPC Systems

MasterCard

Morrison Foerster

Nixon Peabody

Rensselaer Polytechnic Institute

S&P Global Ratings

SAP

Sirius XM

Sitel

Start-ups and private-
equity owned companies

Tailored solutions for leaders and organizations

Leaders face a wide range of challenges, whether they’re navigating high-stakes decisions individually or driving organizational transformation. I partner with both individuals and organizations to provide actionable strategies and tailored support to achieve measurable business results.