We are committed to helping you address relationships and organisational cultures that impact.


Meet Colleen

Colleen Sterling, Founder of GLM™ (Great Leaders Matter™) Executive Coaching Services, is passionate about you finding the right executive support. Coaching versus mentoring: which is the right approach for you?  What is your ideal outcome? How do you want to think and feel? Figure out what kind of support you need and why.

Colleen is a certified executive coach, advisor, workshop designer/facilitator, mentor, author and project leader focusing on innovation, strategy and resilience. She has over 35 years of teaching, leadership, regulation and executive management experience in richly diverse communities across the UK and globally.

She is an accomplished champion of universal and targeted support systems. Over the past 3 decades she has designed and delivered business and operational support, workshops on regulation and development programmes in London, Germany and South Korea.

In the process – and independently she has mentored numerous aspiring leaders and provided executive coaching services to experienced leaders in the private, voluntary and public sectors.

She works extensively with individuals, corporates and public bodies, Her work is now evolving to include coaching collaboration with psychology services with  a step-up or step-down model.


Our sessions are tailor-structured to enable you to choose the frequency of  contact that works for you. We can work together through a series of structured conversations that is bespoke to the work you do, the stage you are at, the challenges you face and the direction in which you are heading.

"However, I can only coach the coachable". The traits that make a person coachable include; honesty and humility, the willingness to persevere and work hard, and a constant openness to learning.


Expert help when you need it.

Expertise, Flexibility and Access.

An Executive Coach can, provide insights, and help you to stay focused and resilient or simply act as your discreet sounding board…

Contact us to learn more

Your transformation agenda reloaded.

Driven by our framework:

  • The Methodology - Using the ULUP framework to solve a pressing problem.
  • The Journey -  process that uses the framework to get results efficiently.
  • The Outcomes - serious impact, value, and results for you and your organisation.

We facilitate a confidential space for leaders to discuss leadership and other challenges with an executive coach who is both unconnected to your organisation and not responsible for managing your performance. Having someone to talk to, who understands the challenges, can significantly improve brain health and facilitate your retention in-role. 

 We have highly skilled and experienced coaches on our team with backgrounds in Education, Psychology and Social care.

 We serve Executives, Headteachers and aspiring leaders across the public and private sectors to help them gain self-awareness, clarify goals, achieve development objectives, unlock potential or simply act as your discreet sounding board…

 An Executive Coach is often the back-rest behind every great leader.

This is a 6 month Commitment  - with flexible and unlimited access to me or your dedicated executive coach via video and audio conferencing, telephone or in person.

You can also access our live online workshops made up of small leadership groups. This private community is a confidential environment for leaders to develop the most effective leadership behaviours and learn from each other, using action-learning and problem-solving techniques.

Key benefits to you.         

Imagine having:

  • A renewed sense of energy about turning your experiences around.
  • A new awareness of what is causing many of the challenges in your role right now (they may not be what you think!)
  • New insight enabling you to view problems and obstacles as mere tools and opportunities.
  • Personal insight to the harsh truth no one else will tell you.
  • More certainty as you step outside your comfort zone.
  • Confidential communication with an Executive Coach, virtually or in person. 
  • Build trust and accountability into your leadership style and behaviour that does not hold you back.
  • Tenacity to stay on track and sustain a high level of performance.
  • Confidence to improve your professional relationships and ensure you are gaining the most from them.
  • True work/life balance.
  • Value for money.

Frequently Asked Questions.

Discover one thing standing in your way from reclaiming your courage and strength as a leader.

Welcome to Great Leaders Matter™ a new way to access discreet executive support.

Your role requires a strong presence. The time is right, the time is now to re-set the balance for Executives, CEOs Headteachers and aspiring leaders across  public and private sectors.

We are delighted you are here.

Contact us to learn more