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Team

Our team helps people grow successfully.
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Professional trainer and coach smiling during a workshop session.
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Astrid, professional coach and trainer at growwerk supporting international communication and leadership development.
The growwerk team brings together experienced trainers and coaches who work with well-known organisations across sectors. We share a commitment to helping professionals build the insight and cross-border skills that make collaboration and leadership work internationally.

Jeff Aristy

Managing Director, Coach & Trainer

Jeff leads growwerk and has worked for more than 20 years in training and coaching, with a focus on developing people skills for international work. A certified interpersonal skills trainer and ICF-accredited PCC coach, he works with clients to shape workshops, learning programmes and team events that fit their people and their challenges.

Originally from New York and now based in Munich, Jeff has also lived and worked in several European cities.

Professional coach smiling in a portrait against a neutral background.
Professional trainer and coach smiling during a workshop session.

Dan Marsh

Business Communication Skills Trainer

With over two decades of experience as a communication skills trainer, Dan helps leaders express their ideas clearly, persuasively and with genuine presence. He works with clients to strengthen listening, empathy and the emotional intelligence needed for challenging conversations. Drawing on his coaching background, Dan partners closely with people to build the self-awareness and self-management that support more mindful and effective communication.

Bob Dignen

Coach & Trainer

Bob has over 30 years’ experience helping professionals work, communicate and lead in international environments. He specialises in senior leadership development and supports individuals and teams as they step into global roles and navigate organisational change.

Based in the UK, and active across Europe, he is also a published author and keynote speaker who brings steady insight and a clear perspective to complex leadership challenges.

Professional trainer and coach smiling in a business setting with a blurred background.
Astrid, professional coach and trainer at growwerk supporting international communication and leadership development.

Astrid Jannke

Coach & Trainer

Astrid supports professionals navigating the realities of international work, especially during periods of change, transition and relocation. As an ICF- and EMCC-accredited coach and certified intercultural trainer, she works with leaders and professionals relocating for work to build confidence, clarity and a stronger sense of direction in new environments. Her coaching style is steady, reflective and relationship-driven, helping people find their footing and work with greater ease across cultures.

Andy Leal

Coach & Trainer

Andy brings more than 35 years of training experience and over two decades in leadership, with a strong focus on developing people skills that make a real difference in daily work. He helps professionals build the confidence and clarity needed to collaborate effectively across cultures.

Originally from the UK and now based in Germany, Andy is known for his grounded, practical style that turns everyday challenges into learning and growth.

Professional trainer and coach smiling in business attire against a neutral background.
Professional trainer and coach smiling outdoors with natural background.

Louise Jefferies

Coach & Trainer

Louise is originally from the UK and now lives just outside Munich. Having spent much of her life working across cultures, she understands the realities of communicating and growing in international settings. A certified mental health coach with over 20 years’ experience, she supports individuals and teams through coaching and workshops that build confidence, self-awareness and more authentic ways of working together.

Bo Graesborg

Coach

Bo has worked in leadership and talent development for more than two decades, supporting organisations as they build strong leaders and plan for succession in complex environments. His experience includes designing international leadership programmes and coaching leaders at all levels.

Originally from Denmark and based in Germany since 1999, Bo brings a calm, thoughtful approach that helps people grow into demanding international roles.

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We help people work better internationally
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