We help teams to get the best from each other, while helping the individuals in each team to get the best from themselves.  

Libby Child

My years in senior international leadership roles, managing multiple teams, taught me that is vital to align the skills and ambitions of your people with your business objectives. To provide a clear and positive direction, to bring everyone with you, to motivate.

I spent 20 years working in international communication agencies- Ogilvy, Y&R, and McCann, as a Managing Director, European Chief Operating Officer, and Global Account Director.

I came to realise that agency/ client team relationships are amongst the most complex and inter-dependent of professional service relationships – the quality of an agency’s output is highly dependent on the quality of their clients’ leadership.

So, 15 years ago, I made the decision to channel that rich and varied experience into helping those teams, by setting up Aprais UK – part of a global network – specialising in measuring the relationships between marketing companies and their communication agencies.

Jaguar Land Rover, BAT, Sony Mobile, Vodafone, and Marks & Spencer were amongst my clients. I was personally responsible for running international assessment programmes, covering thousands of teams, across 30+ markets. The decision to co-found Greengrass Consulting was the natural next step.

I’m deeply committed to the marketing sector and have just run a major quantitative and qualitative survey for IPA/ISBA, researching Marketing Effectiveness cultures. I bring together sector knowledge, leadership experience, tools and techniques- as well as passion, objectivity and integrity. I’m also a qualified Pilates instructor, as I believe the stronger we are mentally and physically, the more resilient we are.

  • Professional Certificate in Coaching (PCIC)
  • Accredited systemic team coach (AOEC)
  • Denison Consulting Partner, accredited to deliver the Denison Organizational Culture Survey (DOCS)
  • Trained Barrett Values facilitator
  • Team Diagnostic Survey (TDS) facilitator
  • Certified in PPA (DISC) profiling: Thomas International

Marina Lumley

Over the last two-plus decades I have held senior leadership roles, worked with over a hundred teams and a similar number of individuals. In addition to leadership and development consulting, I am a professional coach with an MSc in Coaching and Behavioural change.

I help organisations, teams and individuals to increase their impact by releasing pent up potential – increasing business performance and personal satisfaction (employee engagement, commitment and energy). The way I do it is observable, measurable and scalable.

Collaborative by nature, I have boundless energy and enthusiasm, and an understanding of the psychology and neuroscience behind behaviour change.  

Clients include BT, EE, Babcock, Direct Line, Suzuki, Saatchi & Saatchi, Freightliner, British Cycling, Visa & Wunderman Thompson & Kindred.

  • MSc Coaching and Behavioural Change (Distinction)
  • Professional Certificate in Coaching (PCIC)
  • Certificate in Systemic Team Coaching (AOEC)
  • Denison Consulting Partner, accredited to deliver the Denison Organizational Culture Survey (DOCS)
  • Vital Signs Assessments for individuals, teams and organisations (6Seconds)
  • Certified in PPA (DISC) profiling: Thomas International
  • Hogan Accredited
  • Emotional intelligence Assessor and Practitioner (SEI 6seconds)


Our glass is always half full. 
The grass can be greener. 

It’s our energy that helps to drive positive change, Our values are reflected in every aspect of our approach.


We believe people have the power to transform business

We believe that every individual and team can thrive.

We approach our work with optimism and energy.


We believe getting to reality – finding out what’s really going on, how people really feel – is the best starting place for change.

Every part of our methodology is designed to surface reality and work with what we find. We have no pre-conceptions.


We believe that trust is the foundation of all relationships.

We deliver what we promise with integrity, and we keep our relationships confidential.


We believe in enabling choices and options.

Our work is focused around challenging the status quo, spotting what’s stuck and helping to create options and choices for individuals and teams.


We offer a full-spectrum, connected service through our network of partners. 

We don’t pretend to be a jack-of-all-trades. We prefer to recommend colleagues with whom we’ve worked, many times, and whose work complements our own.


My experience over the years, working with organisations and individuals, has given me the ability to deliver results in complex and complicated operational environments. I’ve helped businesses and people to create strategies, programmes, and develop cultures that produce successful outcomes and future proof operations.

As a thought leader in high performance, with extensive academic and practical experience of strategy development, my work involves helping businesses to build teams that are better-aligned, focusing on results, delivering change by establishing collaborative stakeholder networks.

  • MSc Coaching & Behavioural Change (Distinction)
  • PHd in the field of High Performance and Cultural and Behaviour Change in complex environments. 


I’m an accomplished learning and development professional, with over 20 years’ experience working across the widest range of industry sectors. 

With an MSc in Coaching and Behavioural Change, that experience includes developing the internal coaching capability of organisations, working with leadership teams and executive coaching. I also have a degree in Psychology and Computing, and I’m a Chartered Member of the CIPD.

  • Leadership coach and facilitator.
  • EMCC Senior Practitioner.
  • Certified Dare to Lead Facilitator. 


I am an EQ and applied neuroscience programme designer and advanced facilitator and team coach. I’ve been advancing my own understanding and applying emotional intelligence principles and practices for the last eight years in both Europe and the Middle East. Working extensively with teams and groups, I help people to develop a growth mindset, building their curiosity and guiding them to deepen practice and reflection.

  • Applied Neuroscience Programme Designer
  • MSc in Coaching and Behavioural Change
  • Advanced Emotional Intelligence Practitioner
  • Emotional Intelligence Practitioner and Masters Level Coach.

    Having spent over 20 years devising marketing and growth strategies for big brands, I then trained to become a Professional Coach and Licensed Practitioner of NLP to help individuals and small businesses grow as much as those brands. Specialising in helping people get out of their own way when it comes to all things life and business, my approach is direct, action-focused and accountability based. As I'm the first to point out…nothing changes if nothing changes. 

  • ADCT coaching qualification (Accredited by Association of Coaching)
  • Licensed Practitioner of NLP
  • Certified EQ Assessor for Six Seconds SEI assessment tool


    Scott specialises in supporting us with research, insight and analytics - delivering expert quantitative and qualitative solutions including online surveys, focus groups, depth interviews, advanced data analysis, text analytics, stylish reports & presentations and infographics.


    As MD of Denison UK, Karen works closely with us and her certified partners to turn what is often ambiguous and intangible, into something energising and productive.


    Combining over thirty years experience in effective creative communications with a Master's degree in organizational consulting, Paul has many years experience as a facilitator and trainer in creative industries.


    Steve is an experienced global marketing leader at CMO level, a fully qualified executive leadership coach, accredited at Senior Practitioner level with the European Mentoring and Coaching Council.