I’m Calum Byers.   I combine over 30 years of international business experience with expertise as an accredited coach and a deep interest in people  to help  my clients successfully develop their leadership skills and manage new personal or business challenges.

Calum 3

Corporate Career :  I trained as an engineer, and started my career with BT, where I set up and ran their operations in Australia.  Returning to the UK, I joined  Spider Systems (Scottish high-tech startup) where I ran the network management business.   Looking for a new challenge, I moved to  Nortel Networks,  where my  roles  included sales, product management, operations and strategy, leading the EMEA services business, and leading global sales operations.  I also managed the sale process for our GSM wireless business.  From there, I joined Aircom International  as the software GM and then Chief Operating Officer and UK MD. 

As well as being a director of various Nortel and Aircom entities, I have been on the board of an Israeli JV and a German SAAS business.

Own Business :   In 2014 I decided to set up on my own, and formed Schiltron Associates.   I soon realised that my real interest was in people and how to best support their personal and team development through coaching.  I completed a Professional Certificate and then an MSc in Coaching at Henley Business School and achieved ACC and then PCC accreditation by the International Coaching Federation(ICF) to ensure I had the theory and the practical skills.   

My focus now is on developing my coaching practice, through my work as an associate for several companies and with my direct clients.

Personal :     I am married with two adult children and have recently moved back to Edinburgh.  I love being outdoors – walking, cycling and climbing Scottish mountains. I also enjoy crosswords and music – and am learning to play the tenor saxaphone and the electric guitar.


  • Henley  Business School:   MSc in Coaching and Behavioural Change
  • Henley Business School:    Professional Certificate in Coaching
  • Cranfield University:         GM Programme
  • City University:                   MBA in International Business
  • Heriot-Watt University :    BSc Hons in Electrical Engineering

Coaching Accreditations:

  • ICF  –  Associate Certified Coach (ACC)
  • ICF  –  Professional Certified Coach (PCC)  
  • PROPHET  – Psychometric profiling for executive teams.

Coaching Clients :

My coaching clients cover a wide range of sectors, business sizes and personal roles.   My larger clients have included:

  • Babcock International
  • Financial Conduct Authority
  • Spotify
  • Starbucks
  • Intellectual Property Office
  • BUPA
  • Times Educational Supplement
  • Thomson-Reuters
  • Morgan Stanley
  • Fidelity Investments
  • SEI
  • Royal Bank of Scotland
  • UBS
  • Wandle Housing Association
  • Vodafone
  • Bank of America
  • Marks & Spencer
  • HSBC
  • Angel Trains

I have also coached founders of start-ups including :

  • Zen Cargo
  • Zego
  • Eargym
  • Red Evolution
  • Cheerfy
  • GetaSnap

Some feedback from my clients is available here.

To discuss ways in which I could help you in your personal or corporate journey please contact me at