Leadership Team


  • James South

    Managing Director, Senior Consultant & Mediator

    James South James South is the Managing Director of the Centre for Effective Dispute Resolution (CEDR).  As a mediator, facilitator, consultant and trainer, James has over 25 years of experience in over 30 countries, working with individuals, organisations and public institutions to prevent, manage and resolve conflict effectively. A lawyer in his native New Zealand, … Continued

  • Graham Massie

    Chief Operating Officer

    Graham has over 25 years’ experience as a business consultant and trainer of technical and business skills. After qualifying as a Chartered Accountant, he spent ten years with KPMG London where he ran a professional services department responsible for a broad cross-section of clients ranging from major PLCs to small owner-managed businesses. During this period … Continued

  • Susanne Schuler

    Director of Training and Consultancy, Senior Consultant & Mediator

    Susanne Schuler joined CEDR (Centre for Effective Dispute Resolution) in 2013. As part of her role, she contributes a combination of strategic input, leadership and delivery across the entire range of CEDR training and consultancy services, with a primary focus on CEDR’s conflict consultancy programmes. Susanne is an experienced business and intercultural facilitator, conflict mediator … Continued

  • John Munton

    Director of Dispute Resolution Services

    John Munton is responsible for the operation of CEDR’s contracted dispute resolution services which currently handle over 30,000 disputes every year in more than a dozen industries. He has been working in dispute resolution services for over 30 years and joined CEDR as a Director in 2013, having previously worked with us as a consultant … Continued

  • Marinus Maris

    Director of Sales & Marketing

    Marinus Maris joined CEDR in January 2019 as the Director of Sales & Marketing, overseeing commercial effectiveness across our three business units. Along with the oversight of sales & marketing, Marinus will be involved in the strategic leadership across the whole CEDR business. Marinus comes to us from a predominant background in management consultancy, working … Continued

  • Lauren McGuirl

    Director of Commercial Disputes Services

    Lauren McGuirl joined CEDR in July 2019 as the Director of Commercial Disputes.  Lauren is responsible for the strategic leadership of the commercial disputes practice at CEDR.  Lauren actively develops mediation schemes and client tailored alternative dispute resolution solutions.  Lauren also oversees the hundreds of mediations conducted by CEDR each year by its domestic and … Continued

  • Dr Karl Mackie CBE

    Founder President

    Karl is one of the best-known names in commercial mediation practice and brings both professional commitment and legal and business psychology training to his core practice. He has worked on some of the most complex civil and commercial cases to go through the English legal system, including the first substantial Court of Appeal mediation (NRG), Maxwell Pension Trusts, … Continued

  • Eilieen Carroll QC (Hon)

    Principal Mediator and Co-Founder

    Eileen started her career in the international chemical industry before becoming a partner in the city law firm Turner Kenneth Brown (now CMS) where she was a member of the Management Committee and the International Strategy partner. In over 20 years of practice Eileen worked with multinational corporations and a number of celebrity clients based … Continued

  • Andy Rogers

    Principal Consultant & Mediator, Membership, Standards & Media Relations

    Andy is one of the Executive Leadership Team at CEDR, working with clients and members, monitoring standards and liaising with industry, government and the media on behalf of the organisation. Andy joined CEDR in 2005 and for many years was responsible for CEDR’s marketing communications and campaigns, working with Unit Directors to conduct marketing and … Continued

  • Dr Andrzej Grossman

    Principal Consultant & Mediator

    Andrzej (Andy) is a member of CEDR’s leadership team and a recognised conflict prevention and resolution consultant, mediator, coach and trainer working internationally. Since joining CEDR in 1999 he has served in a number of senior management and leadership roles. He now devotes most of his time to providing technical assistance to governments and businesses … Continued

  • Fiona Colquhoun

    Principal Consultant & Mediator

    Fiona is a highly experienced Mediator, Facilitator, Coach, Consultant and Trainer with considerable breadth and expertise, and many years Board level executive experience in both the business and public sector. She is also an ACAS Panel Arbitrator and qualified Henley Business School coach, who works on a great variety of CEDR assignments and projects with … Continued