About Us

Rondi Allan

Nick Reilly

Our founders Rondi Allan and Nick Reilly have both run businesses of various sizes in multiple sectors,  before launching Sustainable XTM.

Rondi was formerly a Price Waterhouse Chartered Accountant and has Manufacturing and Supply Chain expertise.  Originally from Australia, she has worked extensively on 4 continents and been a Board Member in 6 countries.

Nick is a Practitioner of the Institute of Environmental Management & Assessment and comes from a Civil Engineering background.  Originally from Northern Ireland, he has extensive SME leadership experience as an MD and CEO in the construction and utilities sectors.

The team includes highly inspired consultants we enjoy working with, all with complementary experience and having run businesses.

Siobhan Lavelle

Nick Shanagher

Nick is an experienced Managing Director, with business strategy and retail sector expertise.

Jamie Pratt

Neil Huzinga

Neil is an award-winning  business leader and specialises in innovation and value creation.

Siobhan has many years  of corporate and social responsibility experience, with expertise in  reputation  and marketing strategy.

Jamie is an experienced Operations Director, and has particular expertise specialising in Supply Chain and Operational effectiveness.


Everyone on our team who works directly with customers has spent the majority of their careers in business. As Company Directors, Function Leaders and everything that led them there.  So we understand real business pressures,  and take a practical outcome focused approach to get things done for you.

Our story

Sustainable X™ came from Rondi and Nick’s shared interest in Sustainable Business and recognising the urgency of  working towards Sustainable Development Goals.

The energy the process generates in people is infectious,  and we get real satisfaction from seeing  customers benefit from taking action to ‘X’ their positive impacts.  Having run businesses ourselves, we appreciate the day to day pressures and challenges you face, and always strive to be humble, supportive and positive!

Always have an eye on the big picture

Engage everyone

Be open to all inputs

Measure what matters

Purpose and values

Our purpose is to help businesses make their profits sustainable, so that we are positively contributing to Sustainable Development Goals.