The Atom Wave ICF accredited ACSTH program is specifically designed for internal coaches, based on the Solution Focus approach equips participants with professional coaching skills tailored for organisational needs.


We want to ensure you get everything needed to feel confident in your internal coaching skills. Therefore, this is a rigorous program of 100 hrs spread over a period of six months and requires commitment.

During the workshops, you will practice coaching through structured coaching practice sessions and feedback from the course instructors.

You will have Peer Group Practice sessions, submitting reflections to course instructors for review and support.

You will coach real clients and you will again be supported through Mentor Coaching.

You will receive 10 hours of Mentoring focusing on practicing specific coaching competencies, thus covering the required mentor coaching hours for ACC accreditation by ICF.

Upon successful completion of the program together with an ACC level Performance Evaluation, you will earn your Level 1 - Internal and Organisational Coach Certification by Atom Wave and you will have covered the training requirements, the mentor coaching and performance evaluation requirements for ACC accreditation by the ICF.


Module 1 is a 30 hour module with 24 student contact hours, and 12 hours of Instructor reviewed practice. It focuses on the basics of coaching conversations and practice of the coaching skills required for a successful internal coaching relationship.

Pre-Work Assignement

Module 1 Topics

  • What are the building blocks of an internal coaching relationship?
  • When to coach and when not to: The Formula of Change
  • What is the structure of a coaching conversation?
  • What do we ask when we ask? The Solution Focus approach
  • What are the competencies for a coaching conversation: The ICF Competencies in Action

In-Between Module 1 & 2:

  • Peer Group Practice
  • Real Client Practice
  • Mentor Group Coaching #1


Module 2 is a 30-hour module with 24 student contact hours, and 10 hours of Instructor reviewed practice. This is a highly practical module focused on deepening coaching skills, on visiting practical applications of coaching within the organizations.

Workshop Topics

  • Coaching Ethics and client cases
  • "Bracketing" the Manager role and transitioning into Internal Coach role
  • How to run an A-Z internal coaching assignment: Process & Flow
  • Coaching Applications to support internal clients:
  1. Clarify Decisions
  2. Get Re-Ignited
  3. Detox work relationships
  4. Open up Possibilities
  5. Formulate meaningful IDPs
  • Setting up an Internal Coaching Framework
  • Practicing and observing the ICF Core Competencies

In-Between Module 2 & program completion

  • Peer Group Practice
  • Real Client Practice
  • Mentor Group Coaching #2
  • Mentor Group Coaching #3
  • Three hours of individual Mentor Coaching

Program completion for ACSTH Certificate (aligned with LEVEL 1 ICF requirements):

  • Submit Recorded Session with client for Performance evaluation at ACC level
  • Atom Wave Internal Coach Certification upon all program requirements

Program Director, Instructor, Mentor Coach


Olympia Mitsopoulou founded Atom Wave (then H2gO) in 2002. Since then, Coaching programs for over 100 client organisations internationally have been designed. Amongst client organisations are: AB, Alpha Bank, AXA, Eurobank, IKEA, L'oreal, Philip Morris, Vodafone.

The Atom Wave "Solution Focused Coaching Skills" program for Leaders was shortlisted for the 2014 European and Mentoring Coaching Council (EMCC) Best program award. In 2017, the ICF ACSTH "Internal Coach Certification" program was designed to address the challenges of the internal coaching. Measuring business impact and ROI of coaching is an inherent part of Atom Wave programs and it has developed the "Zoom In - Zoom OutTM" model for measuring Business Impact and ROI of Coaching.

Olympia is credentialed PCC coach by the ICF (International Coach Federation), Program Designer and Director of the Atom Wave "Internal Coach Certification" ICF ACSTH program , Certified by Coach U, Certified by SolutionSurfers in BRIEF Coaching and Team Coaching, and by AXIALENT in Conscious Business coaching. She is also a trained assessor for the European Individual Accreditation and the European Quality Award for the European Mentoring and Coaching Council. Her academic background is in Occupational Psychology (B.A. American College of Greece & M.Sc University of Wales, College of Cardiff).

Olympia is based in Lausanne, and splits her time between working in Switzerland and Greece.

Program Instructor, Mentor Coach & Supervisor

Marialexia Margariti is an organizational psychologist (M.Sc.) & Certified Psychotherapist (M.A., ECP), Professional Certified Coach by the ICF (PCC), EMCC Assessor of training providers (EQA) & coaches seeking individual accreditation (EIA) and supervisor.

She spent a large part of her career in the corporate world, starting in the area of Human Resources, and later in the areas of brand management and advertising at European and global levels.

She has coached senior managers, individually & in teams, for more than 1.500 hours and has worked as senior trainer in large coaching & mentoring programs at local and international levels.

In the last couple of years she is supervising teams of students in coaching training programs (internal & external coaches).

Marialexia has served as Vice President Quality in EMCC's International Executive Board responsible for matters related to Ethics, Regulation, Diversity & Inclusion, competencies & CPD for coaching/mentoring/supervision. She is a founding member and former President of EMCC Greece. She is also member of European Association of Psychotherapy (EAP), National Organisation of Psychotherapy Greece (NOPG) and International Coach Federation (ICF).

Why is Internal Coaching now more important than ever?

Read research about the important contribution of coaching on change management schemes and how High-Performance organisations have relied on internal coaching to increase profitability.

How can you tell whether coaching has been an investment worthwhile?

This is a very good question that is relevant not only for coaching but for most Leadership Development programs as well. Business Impact and measuring ROI is a core area of our own research about coaching and and as such we have incorporated in our ACSTH "Internal Coach Certification" program a simple yet effective methodology to calculate ROI of your internal coaching assignments.

Does ACSTH accredited training means I am an ICF credentialed coach?

ACSTH training stands for Accredited Coach Specific Training Hours and it is a term used by ICF to signify that a specific program has been assessed to meet all operational and quality standards to cover training requirements for credentialing via the ACSTH option. Minimum ACSTH for ACC credentialing are 60 hours and the Atom Wave "Internal Coach Certification" program is a 90 hour program with 70 ACSTH hours, so the 60 hours are more than covered. Additionally, in order to get credentialed as a coach at ACC level by the ICF, you would also need to:

  • 4 Hours of Mentor Coaching (within the program you get 6 mentoring hours and therefore only need 4 instead of 10)
  • Submit a Recorded Session & Transcript which will be assessed 
  • 100 client coaching hrs (not with Direct reports)
  • Pass the Coach Knowledge Assessment
  • Pay the respective application fee

For more information please visit the ICF relevant page:

How much time would I need to invest to meet requirements of this program?

The program spans within a 6 month period and it has a 90 hour duration. Therefore, you could estimate an average of 15 -20 hours per month. Of course this varies according to each individual.

How do you define Internal Coaching?

An Internal Coach is an employee within an organisation who has been trained and qualified as a professional coach practitioner and has specific coaching responsibilities with colleagues outside own line of management responsibilities.

Internal Coaching DO's and DON'Ts

What are the Internal Coaching DO's and DON'Ts? How is it different to external coaching. Download here a practical guide for your internal coaching scheme.

How is coaching different from mentoring?

A mentor is an expert who provides wisdom, advice and guidance based on his or her own experience. The coaching relationship is a relationship of partnering and equality independent of hierarchical or professional differences. It does not include any advising or guidance from the coach.