Dr Herb Castillo

Associate Partner
Practice Leader - Sustainability


I develop methodologies to help UHNW families identify and target opportunities for creating positive impact, in a way that aligns with their values. I also develop frameworks for tracking the impact that they make through their engagement with Itriom.


United Kingdom/London

Herb divides his time between London and Belfast where he works with individuals and organisations in developing strategies and frameworks for assessing and measuring their sustainability and ESG performance. Measurement being key to maximising impact.


Since 2000, Herb has worked across diverse sectors developing methodologies and frameworks for robustly managing, measuring and assessing sustainability/ESG performance.

This has included developing sustainability/ESG strategies, measurement frameworks and data collection frameworks.

In addition to his specific expertise in sustainability/ESG, Herb also has a strong interest in data analyses, and in particular, its application for measuring and reporting sustainability performance.

Key awards and

Over 20 years experience supporting organisations across diverse sectors, in developing sustainability and ESG strategies, and in monitoring and measuring their impact.

Doctor of Philosophy (Ph.D) in sustainability assessment from Loughborough University, United Kingdom (2004).

The key output of my Ph.D was ELASTIC, which was a novel framework, underpinned by multicriteria decision analysis, for context-specific measurement and assessment of sustainability in the transport sector that incorporated stakeholder input.

‘ELASTIC – A methodological framework for assessing and measuring sustainability of transport systems’.

Published widely on the topic of sustainability measurement in peer-reviewed journals (see examples below).


Castillo, H. and Pitfield, D. ELASTIC – A methodological framework for identifying and selecting sustainable transport indicators. Transportation Research Part D: Transport and Environment, Volume: 15, Issue: 4, Publisher: Elsevier Ltd, Pages: 179-188

Castillo, H., Moobela, C., and Price, A. D. F. Assessing Urban Social Sustainability: Current Capabilities and Opportunities for Future Research. The International Journal of Environmental, Cultural, Economic and Social Sustainability, Volume 3, Issue 3, pp.39-50.

Walton J.S., El-Haram M., Castillo H., Horner R.M.W., Price A.D.F., Hardcastle C. Integrated Assessment of Urban Sustainability: Identifying Concepts and Needs, Proceedings, Sustainable Urban Environment: Vision into Action, Birmingham, UK, 28th February – 2nd March 2005, pp 353-390.

Castillo, H., Pitfield, D.E. and Price, A.D.F . Assessing sustainable transport – methodology and application to the UK. Presented at the SMIA conference. Geneva, Switzerland.

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Alizah Beg

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Georgina Murrin

ESG Analyst

Georgie is an ESG Analyst and researcher. She researches trends, develops insights and reports, and writes insight articles on sustainability and ESG related topics to ensure Itriom’s clients are up to date on the latest policy, progress and initiatives to inform the platform and help our clients maximise their positive impact.

Tim Boughton

Senior Partner
Practice Leader – Leadership & Resilience

Renowned family office thought leader, Tim works with UHNW families to ensure they are fully equipped to deliver their legacies inter-generationally and effectively.

Dr. Herb Castillo

Associate Partner
Practice Leader – Sustainability

Dr. Herb creates methodologies and frameworks for managing, measuring and assessing sustainability performance. His work identifies where maximum impact can be made.

Simon Hulland-Lucas

Senior Partner
Practice Leader – Geostrategy

Simon harnesses research, liaison and networks globally to identify opportunities for Itriom, building the knowledge needed to deliver intergeneration legacies for UHNW families.

Matthew Millard-Beer

Managing Partner
Practice Leader – Strategy

Matthew is Founder & CEO of Itriom, providing solutions and a global platform for Ultra High Net Worth Principals and their families to engage in unifying purpose, enduring legacy, and sustainable impact.