Advisory & Transaction Services Overview

Advisory and Transaction Services brings together our strategic and technical consultancy services to clients in all our key sectors

Service Line Team

Trevor Harraway

(AFR) Close

Trevor has over 20 years’ experience as an ESG management consultant, providing strategic transaction due diligence and advice

to the investment community of clients involved in technically complex M&A deals across African and global sectors e.g. oil & gas, chemicals, power and renewable energy, mining & minerals, retail and real estate, agriculture/chem, manufacturing, fast moving consumer goods and logistics.

His work involves design and execution of due diligence assessments, development of red flag reports and environmental and social action plans, and advising clients during initial investment screening stages in support of investment committee submissions and approvals.

Trevor has global experience gained from living and working in South Africa and the UK (1998 – 2011), including running his own boutique due diligence consultancy . He has on-the-ground experience in many countries in African and Europe, with indirect project experience in all the major regions of the world. His t rack record includes managing due diligence on foreign direct investment, funding and project finance in Europe and Africa for major private equity and co-invested DFI/export Credit Markets, including IFC, AfDB, AFC, DEG, CDC Group, Norfund, FMO, AfricInvest and others.

He has advised private and public listed companies managing and directing teams of experienced consultants to deliver on complex DD assignments, identifying and analysing implications of technically material ESG issues on the investment case, advising on operational improvements and assisting with development of exit strategies.

Trevor is experienced in various technical disciplines ranging from land, air and water quality risk evaluation and mitigation, social impact evaluation and mitigation, strategic advice around supply chain, reputational risks, health & safety of workforce and community, energy & carbon management, and issues relating to climate resilience and opportunities around security of power and water supply.

He applies commercially sensitive approaches to evaluating ESG risk and opportunities to enable clients to preserve, create or enhance value throughout their investment cycle.

Julie Gartside (EUR)


Julie has spent over 15 years working with companies from a range of industrial and commercial sectors to understand the impacts of carbon and energy legislation and reporting schemes on their business.  She helps organisations to integrate their response to these policies into business operations and achieve sustainable compliance.  Julie also helps organisations with the management and reporting of their greenhouse gases (at organisational, product and supply chain levels) and works with them to develop strategies to reduce energy use and carbon emissions, and hence operating costs.

Julie is also Chair of the UK Emissions Trading Group Domestic Measures working group.  This group is attended by UK government departments, the UK Environment Agency, trade associations and large companies to discuss and debate changes in UK energy and carbon policies (e.g. Climate Change Agreements, Carbon Reduction Commitment and the Energy Savings Opportunities Scheme, plus how they interact with the EU Emissions Trading Scheme).

John Turley

(US) Close

Mr. Turley has over 35 years of experience that includes production/operations, EHS management, and global transaction advisory services. His experience focuses on the needs of strategic and financial buyers for complex deals in the refining, chemicals, and heavy industrial sectors. He has managed the EHS due diligence on a wide range of global industries and his clear understanding of the issues encountered by buyers, sellers, and financial institutions allows him to provide advice instrumental to successful deal completion.

John Postlethwaite

(APAC) Close

John has around 30 years of diverse experience in both environmental and civil engineering projects. He has worked on Australian and international projects, providing professional advice and guidance to private and public sector clients.

He has worked across many industries and market sectors and has been involved in the successful delivery of many multi-disciplined small to major scale projects. Although he has a depth of knowledge of civil design projects, over the last 10 to 15 years he has specialised more in environmental engineering, with particular emphasis on EIS, land and water quality assessment, surface water hydrology, flood estimation and water sensitive urban design. The marriage of civil design and construction practice and environmental rigour has provided John with key skills and experience that have enabled him to guide the design and approvals processes, and ultimately enabling ‘best on balance solutions’ for many challenging projects.

His experience also extends to on-site water supply and wastewater treatment and disposal, transport planning and civil infrastructure design. John has worked alongside and assisted land and property developers, energy providers, mining companies, local and state government departments and other statutory authorities.

John’s diverse background across the environmental assessment of sites and vast construction experience enables him to provide a holistic approach to project management and robust advice to clients throughout the project’s life, through site enabling, planning and development approval, design and construction and rehabilitation.

John has also been able to apply his ‘hands on’ management and leadership style and use his effective communication skills to grow multi-discipline teams; not just in numbers but also in technical understanding, practical and economic designs and to harness and embed sustainable attitudes to project delivery.