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Efficere's principal coach, Sachi Wimmer

Hello, I'm Sachi from efficere. As a leader, I have always aimed to find the potential in others, building capability and challenging people through change. I bring this same focus into my coaching practice and enjoy seeing people grow, flourish, and succeed. 

As a coach, I combine knowledge and skills from 25 years in the public service, 15 years of those as a senior executive, together with formal training as a Level 1 & 2 accredited coach through the Institute of Executive Coaching and Leadership (in addition to undergraduate and masters degrees, leadership and management training). 

My diverse experience includes leadership roles in Departments, agencies, task forces and in a Minister's office (Prime Minister and Cabinet, Home Affairs, Agriculture, Environment, Infrastructure and Transport, Customs and AMSA). I have led teams of all sizes across Australia and overseas, setting strategy and tackling complex challenges in governance, policy, regulation, and operations. The range of issues I have worked on is diverse: domestic and international, national security, transport, safety, environment, border and industry issues, among others. 


So, I have a deep understanding of the challenges and nuances of complex and dispersed workforces. My diverse experience means I know government and have practical expertise in leadership and management – which I draw on to provide pragmatic insights and guidance in my coaching. 

As someone who has worked with an Executive Coach for years, I know how valuable an objective and unbiased conversation can be in pushing you to think laterally and navigate the obstacles hindering your progress. My aim is to work with you to gain new understanding and clarity, generating strategies and actions that will drive you to find success. 


the back story...

After starting my working life in lobby groups, I fell into government roles as Australia went into recession in the mid 1990s when there was very little work around for a marine biology graduate - who knew that would be the case! 

Following time out to pursue my dream of becoming a ski instructor and working in Papua New Guinea for the Asian Development Bank, I realised that the government offered great opportunities. In 2006, I completed an Executive Masters in Public Administration which grounded my understanding of government and built strong leadership skills.

I moved quickly from the Executive levels into the Senior Executive Service where I had great, and not so great, experiences with leaders, managers, and teams. I also learnt what it was to balance family and work, becoming step mother to two boys and embarking on the great Australian dream to build your own home. 

Some years later, I began to think about whether government remained the right fit for me and where I could best use my skills. I'm a strategic thinker and risk taker, driven and energetic, most motivated by seeing goals delivered and people grow with the world being a better place as a result. 


So, after much reflection on what was important to me, and how I wanted to live, I realised that I needed to take control and do the thing that brings me most joy, helping others succeed and be their best, so I became a coach!


  • Executive Masters of Public Administration

  • Masters of Environmental Law

  • Bachelor of Science (Hons) 

  • Institute of Executive Coaching and Leadership - Level 1 & 2

  • Australian Institute of Company Directors graduate

  • Stanford University - Executive Program in leadership

organisational coach level 1 certification
organisational coach level 2 certification

Coaching Experience

  • Department of Prime Minister and Cabinet

  • Department of Foreign Affairs and Trade

  • Department of Finance

  • Department of Defence

  • Attorney General's Department

  • Treasury

  • Department of Social Services

  • Services Australia

  • Department of Home Affairs

  • Australian Federal Police

  • Department of Climate Change, Energy, the Environment and Water

  • Department of Employment and Workplace Relations

  • Department of Health

  • ACT Government


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