Jan Alberdingk Thijm

Jan Alberdingk Thijm has an MSc in Economics from the University of Amsterdam and a Postgraduate degree in Executive Coaching from Hult Ashridge Business School. He is a former Executive Board Member at Nutreco, a global animal nutrition company. Since 2019 he has operated as an independent leadership and executive coach, based in The Netherlands.

Barbara Tremblay

Barbara Tremblay is a certified international executive and leadership development Coach who specializes in creating the environment that ignites individuals and teams' creativity.

She was educated at the University of Quebec, earning a bachelor’s degree in education and studied post-graduate political science at McGill University.

After beginning her career in Montréal as a specialized teacher for students with learning difficulties, Barbara transitioned to the corporate world in Toronto where she spent 17 years at Nike in various leadership roles, working in Canada and in The Netherlands at the European, Middle Eastern and Africa headquarters.

Barbara has guided individuals and teams working for Global Companies in leadership skills. She is also a Leadership Coach for MBA students at Rotterdam School of Management, Erasmus University, at THNK School of Creative Leadership. She is the Chair of the board of Connexion-U, a non-profit organization focusing on education and protection of human beings.

A Pilates enthusiast and keen figure skater, Barbara is fluent in French, English, and has a working knowledge of Dutch.

Jeremy Solomons

Jeremy Solomons is the UK-born and USA-naturalized founder, owner and president of both JSA Consulting (Rwanda), Ltd. and Jeremy Solomons & Associates, Inc. Both firms help current and future leaders to connect and communicate effectively across all cultures – geographical, organizational, professional and individual.

From his twin bases in Kigali, Rwanda and Austin, Texas, he coaches, consults, designs curriculum, facilitates, trains and writes in the areas of: Career Re-Imagining; Challenging Conversations; Constructive Feedback; Diverse and Dispersed Teams; Gender Equity; Global Communication and Presentations; Influencing, Negotiating and Persuading; and Leading Inclusively in a Hybrid Workplace.

He is an ICF-certified ACC coach, specializing in Leadership Development and Career Transitions and for C4SL, Jeremy has spent the last two years virtually coaching 11 senior global leaders of Bunzl PLC from Los Angeles to Valencia to Melbourne as part of their 18-month Senior Leadership Development Programmes. A new cohort begins in person in Noordwijk, the Netherlands in June 2024.

In the past, Jeremy managed a diverse staff and worked with clients and colleagues from all over the globe, while employed as a full-time Banker, Educator and Journalist in six multinational institutions: Citibank, JP Morgan, Lloyds Bank International, Reuters News Agency, United Press International and the World Bank.

Rwanda is the ninth country in which he has lived, studied and/or worked for an extended period. Born and raised in Manchester, England of Jewish, Lebanese and Persian ancestry, Jeremy holds MA Oxon and BA Honours degrees in French from the University of Oxford (Brasenose College).

Nanna Kies

Nanna Kies facilitates personal & organizational change through (Executive) Coaching, Team Coaching, Supervision groups and tailored leadership & change programs.

Over the past 20+ years, Nanna has worked with individuals, team & groups and corporates from over the world. With multinational stock-listed companies to family businesses, in many different industries, with people across all leadership levels (from young talents to C-suite executives to seasoned professionals) and across departments, with intact, multifunctional and cross-hierarchical teams. Clients have included ASML, STERIS-AST, Aramco, Neste, Bunzl, Adyen, Nike EMEA, Randstad Holding, GlaxoSmithKline Biologicals, Rabobank, Aon EMEA, AstraZeneca, and Denso Automotive EMEA.

It is through this depth and breadth of experience that Nanna has built a solid understanding of the world her clients, participants and coachees work in, and of the (personal) leadership challenges that they face; she has developed an antenna that quickly picks up on organisational and people dynamics and on behavioural patterns in the wider context.

She supports leaders, teams, groups and organizations to reach their full potential, to flourish and to thrive. She enables leaders, professionals, teams and groups to slow down, ultimately to speed up. In a trusted setting she offers a safe space to pause and reflect on personal (or team) leadership and business challenges. To cultivate (self) awareness. To explore and unravel our thought and behavioural patterns. To look at the question through different lenses. To experiment from a mindset of curiosity and growth. To get unstuck, to discover new possibilities for action and to accelerate growth and performance.

Her style is playful and energetic, knowing when and where to slow down, how to spot and name the elephant in the room, and what to do to create a safe space for learning & experimentation. Nanna believes that change happens, to a major extent, in the space between individuals, consequently the recurring theme in her work is improving the quality of relationships. She recognizes that it is through the type and the quality of the interactions between people that we make change happen.


A central theme is about of ‘Safe Places’: creating a climate of psychological safety within organisations, because she strongly believes that the quality of interpersonal relationships is a key ingredient for high performance and organisational success. ‘Safe places' is about creating a climate in which people feel included, valued and respected, where people are curious and open-minded, have the courage to flourish and thrive, to speak-up and encourage others to do the same, to spur positive change around them. It allows us to tap into the collective intelligence, to tap into the diversity in its broadest sense and unleash the potential within the organisation, within and across teams, hierarchical levels and organisational borders.


Nanna holds a Master in Science in Executive Coaching from Hult Ashridge Business School (with distinction), is a Hult Ashridge coach, and has been accredited with the European Mentoring & Coaching Council / European Quality Award (EMCC/EQA) at the Senior Practitioner level. She is currently completing her Postgraduate Diploma in Team Coaching at Hult Ashridge International Business School. She holds a bachelor degree in Scientific Translation in French and Spanish. Nanna coaches in Dutch, English and French.

What Nanna offers in her work

Sylvia Kingman

Sylvia is MD of StepUp4Coaching Ltd that she founded over 20 years ago upon the firm belief that coaching has the ability to transform peoples’ lives. Today this belief is even stronger than ever. Her core business is coaching senior leaders and teams across the globe, designing and facilitating Leadership Programs and developing internal coaching pools for businesses.

Sylvia has an MBA with distinction, is a qualified Coach and ICF accredited Supervisor of Coaches.

Sylvia’s coaching is steeped in a deep understanding of business strategy and operations, organisational culture and learning in fast moving global environments. She works systemically to help individuals and teams to make sense of the VUCA world, to recognise the intangibles and to overcome self-limiting beliefs that can inhibit performance. She supports her clients to generate greater self-awareness and insight into their impact and their own personal sense of purpose.

She has a unique coaching style – coaching the whole person – not just the work persona to help her clients achieve their true potential. She establishes credibility quickly with even the most sceptical people and helps them achieve the results they are seeking, both in business and personally. Sylvia combines warmth and empathy with challenge, to great effect and can be relied upon to use her good sense of humour to help people regain perspective.

She has worked across the globe from the US to Russia and really appreciates the rich learning from different cultures. Sylvia’s clients include PwC, Astra Zeneca, Saint Gobain, Philips and DLL, as well as the UK Home Office.

Roemer Visser

Roemer Visser’s main interest is in unlocking the enormous potential in individuals and teams to achieve superior performance, engagement, and fulfillment at work. Roemer has designed and delivered leadership development programs for clients such as Van Oord, Atradius, Goodyear Dunlop, Royal HaskoningDHV, Marel, and Belkin.

Roemer’s career includes practitioner and academic roles in both the Netherlands and the United States. He has been a faculty member at TIAS School for Business and Society since 2016. Prior to this, he was Executive Professor at Texas A&M University’s Mays School of Business.

He has a strong record in creating value in areas such as teams, culture, dilemma management, integrity, communication skills, and more recently, authenticity and trustworthiness in leadership. Roemer holds a Master’s degree in Industrial/Organizational Psychology and a Doctorate in Human Resource Development. As both a Dutch and U.S. national, Roemer is a native speaker in both Dutch and English.

Lisa Ross

Lisa Ross-Marcus is an internationally certified executive coach and intercultural consultant. Through her company In-coaching, she coaches and facilitates programs for a wide range of professionals from young talents, to emerging women leaders and C-Suite executives, in both the corporate and NGO sectors.

As an associate at the Center for Strategy & Leadership, she brings on board her diverse skills and international experience in professional/personal development. Lisa's passion is helping her clients to achieve their goals by encouraging them to think creatively and raise awareness of both their own internal barriers and untapped resources of strength. Her coaching provides a process for individuals to make strategic and meaningful choices about developing their leadership skills, in alignment with their values and well-being.

Lisa was a senior corporate communication trainer for 10 years, leading/co-leading programs throughout Europe (including Russia), USA and Asia for multi-nationals in the financial, industrial, manufacturing, petrochemical and pharmaceutical sectors.

She is a licensed TIP (The International Profiler) intercultural coach and delivers training programs to business partners going on assignment in both the USA and The Netherlands.

Born and raised in New York, Lisa traveled to Europe as a student to pursue her dream of becoming a professional dancer.  After several years in Paris, she settled in The Netherlands, where she enjoyed a successful international career as a choreographer, theater director and performer before shifting her focus to professional coaching and training.

Lisa is married to Lee Ross and together they have a daughter Chiara, blended with Lee's two adult children, their partners and grandchildren.  Lisa’s favorite leisure activity is designing flash-mob surprise parties.


Peer Ederer

Dr. Peer Ederer is an associate partner of the Center for Strategy & Leadership and Director of the Human Capital Project of the Brussels-based Lisbon Council. Furthermore, he heads the Innovation and Growth Project of Zeppelin University, Friedrichshafen and is the Academic Director of the European Food and Agribusiness Seminar.

His clients comprise some of the fastest growing companies in Europe, with CEO's who want to accelerate growth through innovation and value-creation oriented strategies and regional governments interested in innovation-led economic growth.

Peer studied Business Administration at Sophia University in Tokyo, Japan and at Harvard Business School in Boston, USA. He completed his PhD at the University of Witten Herdecke in Germany, exploring the financial relationship between the state and its citizens.

In 1995, he co-authored the best-selling book Das Erbe der Egoisten, a socio-economic comparison of Germany, Japan and USA. In 1999, he co-authored a second best-selling book, Geschäftsbericht Deutschland AG, an analytical description of the German state as if it were a stock market quoted company. Numerous articles and brochures have followed on this subject, including participation on a variety of expert panels for the German government. In 2008, his newest study Geschäftsplan Deutschland was published, analyzing the need to increase investment in human capital in the German economy.

Peer started his business career as a financial trader at Deutsche Bank in Japan, trading interest rate derivatives and money market instruments. He worked for four years in the German office of McKinsey & Co specializing on issues of technology management and business growth. He subsequently co-founded a Dutch technology company specializing in food supplements. He also co-founded the think tank "Deutschland Denken!", which is creating and publishing innovative public policy choices for the German society.

The underlying theme to Peer's background ranging from financial trader, public policy expert to technology start-up entrepreneur is his long-standing love-affair and fascination with the power of strategy. Strategy is the "poor-man's tool" to be successful against the odds by generating innovation and growth.

Bill Collins

Bill Collins is an associate partner of the Center for Strategy & Leadership and a senior academic at the Rotterdam School of Management, the Netherlands, where he teaches organizational behavior and strategic human resource management in the MBA and in-company executive programs. In addition, Bill is an independent consultant at Collins Consultancy.

Bill holds a Ph.D. and a Master of Science in Industrial-Organizational Psychology from Georgia Institute of Technology in Atlanta, and a Bachelor of Science in Psychology from Texas A&M University in College Station.

Bill started his career working as Internal Human Resource Consultant at the Georgia Power Company in Atlanta, while simultaneously working on his Ph.D., and subsequently as Human Resource Management Consultant for Towers Perrin. Bill then moved to Spain where he worked at the Instituto de Empresa in Madrid. Here he held several functions, including executive director, internal consultant, coordinator of faculty recruitment, and professor.

After spending almost 5 years in Madrid, Bill moved to the Netherlands where he began working at the RSM Erasmus University. Soon after arriving in the Netherlands, he founded Collins Consultancy and became a visiting faculty at Leiden University.

Bill enjoys spending his spare time reading and traveling.