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私たちは、エネルギーと才能、情熱にあふれた沢山のスタッフで支えられています。世の中をより良くしたいと願う人たちが集う場所、それがインパクトです。

Sarah Osteen
USA
Sarah andOsteen
Senior Consultant

I have spent my career exploring, researching, teaching, coaching and practising leadership skills. I love working with individuals and groups to tackle hurdles and develop strategic initiatives. When I am not designing programs, I like to spend time with my son and my husband building forts out of driftwood or laughing with friends in the beautiful pacific northwest.

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Daniel Osborn
UK
Daniel andOsborn
Business Data Analyst

Having the job title 'analyst' means that I've been lucky enough to get involved in a wide range of projects both internally and working with clients. I love helping people get the most out of the tools they are using, making processes as efficient as possible and understanding data – all of which is part of my work every day. Outside of work, you’ll usually find me in the Lake District somewhere with my family.

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Warangkana Posinsomwong
Thailand
Warangkana and(Lek) andPosinsomwong
Asia Pacific Finance Director

I'm based in Thailand, a country of beautiful islands, good food and nice people. I have a lot of fun working with people around the world. I have more than two decades of international finance and accounting experience. My real challenge is working with Inland Revenue offices in different countries! I love to explore the world through reading and travel and one day wish to have a little cafe where people can sit and have a coffee or few drinks and craft together.

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Mario GianAndrea, Impact Italy
Italy
Mario andGianAndrea
President and Founder

I’ve been many in my working life: an HR Director, an entrepreneur, a leader, a coach, a salesman, a visionary, a confidant, a manager. And a friend. And I am still excited (and sometimes anxious) when I meet a new group of people. I genuinely enjoy it! This is the reason I'll probably work for another decade! The only difference compared to the past: today I can afford to only work on projects and with people that I really like and that gives me the feeling that it will be great fun!

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Vicki Percival Impact
UK
Vicki andPercival
Account Manager

My role is to create and sustain positive client relationships and ensure the successful implementation of global programmes. I work in partnership with my clients to develop customised solutions using our innovative approach to leadership. After living in different parts of the world, I love being back in the Lakes. I spend most of my time indulging in great food with friends and exploring the beautiful place I get to call home.

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Yasushi Igarashi, Impact International
Japan
Yasushi andIgarashi(Yasu)
Safety Quality Controller, Master Coordinator

Before Joining Impact in 2002 I worked as an outdoor guide for nature tourism, kayaking and trekking in the ocean and forest. Using this experience, my strengths are in creating and coordinating programmes that provide learning experiences through outdoor activities. Beyond this role I wear several different hats, such as managing our website and managing H&S. Personally, I love to do challenging journeys by sea kayak and bike in many countries.

Jaya Machet
Singapore
Jaya andMachet
Senior Consultant

My coaching & facilitation expertise builds on a strong foundation of 20+ years in senior management positions including global and regional roles. I guide leaders to their peak potential and help enhance their professional and personal impact. I grew up in India and then studied and worked in Switzerland for 23 years before moving to Singapore. This has helped me successfully bridge Eastern and Western thinking, with an in-depth understanding of both cultures. I am an avid reader and love to spend time in nature and travel. 

Chantana Prapasri, Impact
Thailand
Chantana andPrapasri and"FG"
Finance and Admin

Since joining Impact Thailand in 2006, I have been more energetic and enthusiastic to come to work. It is the best workplace that I can be myself. Everyday at work is great for me.

Michal Zawadzki, Senior Consultant
Poland
Michał andZawadzki
Senior Consultant

Having a limited number of words to describe myself I choose...that is one of the keywords, among decide, like, wonder. There are many others. Working with people, I value being aware – of a person, a group, and also of words being used. I think of them as a code passing through our minds – all that is within the light of consciousness shapes our experiences and reactions towards the world. So, what do you choose?

Jon Hall Impact
UK
Jon andHall
Head of Consulting

I've enjoyed more than 11 challenging years of international work with senior leadership teams; designing & delivering innovative programmes; managing global delivery teams and coaching individuals. I'm known for an insightful and engaging style and love working in the moment with a courageous approach to challenging interventions. I love relaxing with my wife, watching my daughters perform (singing or horse riding), or sharing outdoor adventures.

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Charlie Somers Cocks, Impact International
UK
Charlie andSomers andCocks
Senior Consultant and Head of Global Talent, UK

I am passionate and committed to helping others be the best they can be, whether they're senior leaders or young talent. In my Global Talent role I support the recruitment, induction and development of our full time and associate consultants. This fantastic role has allowed me to work with many of our global team since 1992. Despite being old enough to know better I compete as a Master at a world level at Mountain Bike Orienteering and manage the Great Britain team.

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Simon Wagstaff
UK
Simon andWagstaff
Senior Consultant, UK

I joined in 1982 when the company was two years and totalled four people. I have had the great privilege of what seems like two parallel careers - helping to build and develop our business and working with clients to help them do the same with theirs. I love the variety of my role, that at Impact personal talent is more important than hierarchy, and that we have never waivered from our vision to make a positive difference in the world, through leadership development.

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Marjolein Smith
UK
Marjolein andSmith
Graphic Designer

Born in the Netherlands, I aim for simplicity, clarity and efficiency in my designs and processes. I appreciate Dutch, German and Swiss designs for their geometric boldness and witty solutions as well as the minimalism and sense of calm in modern Japanese design. To soothe my creative brain, I put on my running shoes and head for the beautiful hills that surround me to rediscover my peace and tranquillity.

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Yusuke Kobayashi (Baya), Impact International
Japan
Yusuke andKobayashi(Baya)
Assistant Manager, Client Partner

'Continuing to "enjoy" life'
My lifelong mission is to continue positively influencing both myself and those around me, while persistently seeking enjoyment.
Throughout my career, I've had various experiences, from utilizing cutting-edge technology in logistics to engaging in gritty tasks. Through these experiences, I've realized the importance of finding meaning and joy in everything I do. Although sustaining this mindset is not easy, I am committed to continuous learning to become a professional to bring a positive impact to people and organisations.

tonka watson
New Zealand
Tonka andWatson
Senior Consultant

As a former client, I jumped at the chance to work with Impact in 2002 and pursue my passion for inspiring others to realise their potential. I’m an avid reader and love to incorporate my learning into the leadership development programmes that I deliver; recent topics of interest include applied neuroscience & gender dynamics. Dogs feature widely in my life outside of work.

Sydney Johnson
USA
Sydney andJohnson
Program Manager

I am a Program Manager located in the heart of Texas. My favorite part of my role is interacting with so many different people daily while building and carrying out a variety of client-specific programs. Every day, I learn something new, and it excites me to continue growing in my position. When I am not working, you can find me dancing, rewatching Friday Night Lights, traveling, and spending time with my friends, family, and dogs! 

Pete Hallworth
Italy
Pete andHallworth
Senior Consultant and Facilitator

I have been active with Impact for several years after an international career in sales and marketing. One of my main passions is to foster better leadership. Leaders that inspire, that provide their team with development opportunities, and that have vision and courage will change the world; for the better.  Another passion is helping start-up entrepreneurs get off the ground. Kindness and curiosity are two words I aspire to live by.  It is also very important to me to be kind to our planet.  It’s the only one we have.

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Aidan Keough
Australia
Aidan andKeough
Senior Consultant

I help people gain insights into themselves and their team so they can improve as individuals and work more effectively together. As a facilitator I create the right learning environment and work alongside participants providing a balance of challenge and support. I bring over 20 years of senior leadership experience. I love learning, the outdoors and am fascinated with horses. I live on a small farm with my wife and two teenage children, and a herd of horses.

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Diana Fritz
USA
Diana andFritz
Account Director

As an Account Director with Impact, I’m able to leverage my ten years of Business Development and Account Management experience.  I thrive in environments where I am able to develop and uncover new opportunities with partners and businesses. Most of all, I am a people person and love building trusting relationships. In my spare time, you will find me spending time with my husband, two boys and our dog.

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Carrie Fritz Impact International
USA
Carrie andFritz
Head of Program Management

I'm passionate about helping those around me grow and develop. I encourage my team to bring themselves into everything they do.  Our diverse backgrounds, experiences and perspectives help us partner efficiently and effectively with colleagues and clients.  As a traveller at heart, I’ve visited 31 of the 50 US states, 14 countries and 8 Caribbean islands. I love experiencing new cultures, enjoying the great outdoors and trying local cuisine.

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Yukiko Asano (Coco), Impact International
Japan
Yukiko andAsano(Coco)
Client Partner

I have worked at Impact Japan since 2015, coordinating the delivery of programmes. I support our consultants and delivery operations. What makes me happy is seeing my colleagues, clients and participants smile, as my job is supporting them. My hobby is collecting Starbucks Coffee mugs from around the world, although I don’t drink coffee personally!

David Williams, Impact International
UK
David andWilliams
The Boss!

I co-founded Impact in 1980 to explore adventure and experiential learning in people development. It worked! We now inspire and develop people worldwide. Shared values, a common purpose and a spirit of adventure bind us together. With over 200 colleagues working in the UK, Europe, America and Asia Pacific, we have a solid reputation for enabling clients to build leadership capacity and navigate complex change. To stay grounded, I rear rare breed cattle and sheep.

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Sam Egerton
Singapore
Sam andEgerton
General Manager

An adventurer, I was raised in the UK and have lived and worked in Eastern Europe, Spain and now (since 2012) Asia, where I head up Impact’s Singapore Office. A fierce supporter of the authentic self and advocate for individual growth, I care deeply for my team and clients, wanting them to shine for who they are. I have a keen sense of challenge and adventure, and away from work, you can find me with my young family (usually outdoors!).

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Marta Lamberti
Italy
Marta andLamberti
Senior Consultant and Facilitator

Hi! I am an occupational psychologist, coach and trainer! I have been working for over 20 years to help companies develop and enhance their greatest capital, their people! I met Impact many and many years ago, and I am still proudly part of it! In my spare time I am a theatre actress, a traveller, but above all... a mum!

Our awards

Year after year, we continue to be acknowledged for the quality and effectiveness of our partnerships with clients and for our own work on building Impact as an organisation worth working for.

2025 Training Industry Top 20 Leadership Training Company
Top 20 Leadership Training Company 2025

Impact is a 2025 Top 20 Leadership Training Company. Training Industry independently assess the training marketplace for top providers. Their Top Leadership Training List, based on capabilities and expertise, includes Impact for the 15th consecutive year. 

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AITD 2025 award finalist
AITD Excellence Awards 2025

Orica's Frontline Leadership programme has been shortlisted in the Best Leadership Development category of the AITD Excellence Awards 2025 (Australian Institute of Training and Development).

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