Deep sector expertise across energy, industrials, infrastructure and marine — delivering strategy, diligence, and advisory that creates real-world value.
Calash is an international diligence provider and strategy consultancy combining seasoned commercial expertise with deep technical knowledge — delivering value-add transaction and growth strategy advice across the energy transition and industrial sectors.
We put ourselves in your shoes — questioning everything to get to the real answers and provide practical opinion. Our team harnesses commercial and technical expertise to support businesses both strategically and during a deal.
Working primarily across energy, industrials, infrastructure, technology, and marine markets, our highly knowledgeable team takes a hands-on approach, delivering concise, tailored outputs that are both pragmatic and commercial.
We have completed over 800 projects in commercial, technical, ESG, and operational due diligence, business strategy, market advisory, and restructuring — working with private and publicly owned businesses across the globe.
About usRigorous, proprietary market research providing decision-critical intelligence across energy, industrial, and infrastructure sectors globally.
ExplorePractical, straight-talking growth strategies that enable businesses to realise value effectively and navigate rapidly evolving markets.
ExploreCommercial, technical and ESG due diligence underpinned by 800+ completed projects — giving investors and acquirers the confidence to act.
ExploreESG advisory, climate strategy, and environmental assessment for the energy transition — from renewables and storage to green industrial transformation.
ExploreClose to 25 years of deep, hands-on expertise across the sectors driving the global energy transition, industrialisation, and infrastructure buildout.
District heating, heat networks, gas, hydrogen and conventional energy systems
Wind, solar, hydro, biomass and hybrid renewable technologies
Battery, LDES, pumped hydro and grid-scale storage solutions
Carbon capture, clean fuels, climate analytics and decarbonisation platforms
Green hydrogen, sustainable finance, circular economy and impact investing
Industrial decarbonisation, advanced manufacturing and process optimisation
Energy infrastructure, utilities, transport and critical national infrastructure
Specialty chemicals, petrochemicals, agrochemicals and chemical processing
Maritime operations, offshore energy, port logistics and marine technology
Energy software, digital infrastructure, IoT and industrial technology platforms
Defence-aligned industrial, maritime and critical infrastructure systems
Environmental compliance, impact assessment and ESG due diligence
Our senior team has first-hand experience of founding, running and monetising their own businesses in the sectors we advise on.
We pair deep sector knowledge with rigorous data analysis to overcome challenges, identify market opportunities, and target growth.
Calash has worked globally with a focus on Europe, North America, Australia and the Middle East — with people on the ground in every key market.
We deliver pragmatic, straight-talking strategies and reports — no padding, just the insights that matter.
Throughout his career, Alan has delivered strategic value to energy businesses worldwide — as a business owner and advisor, creating and delivering business plans that have grown companies from start-ups through successful exits.
Iain leads overall delivery of Calash projects, having led strategic advisory and commercial diligence transactions for over a decade. Commercial and financial background from corporate banking with deep knowledge of energy, mining, and industrials.
15 years in management consulting with a focus on commercial and vendor due diligence and strategic advisory across Energy, Industrials, and Technology. Rob has led numerous projects for investors and management teams globally.
Analytical expertise in database design, financial modelling, and market analysis. Master's in Global Energy and Climate Policy. Extensive project experience in waste-to-energy, carbon reduction, solar, and wind.
Calash has direct access to over 4,000 experts globally — meaning in-market insight is only a phone call away, wherever in the world your challenge lies.
The Calash team was responsive, detail-orientated and intuitively knowledgeable about the commercial and technical considerations associated with the offshore energy sector. Their commercial due diligence will help us guide the business into its next phase of growth.
The team was swift, responsive and detailed and became a key part of our efforts during divestment, providing close support from the outset right through our diligence process.
Calash was able to consider all major attention points — from regulation, competition, and market drivers — in a conclusive and efficient way. We look forward to working with the team again in the future.
Trusted by leading private equity, investors & corporates worldwide
Calash has boosted its presence in Central Eastern Europe (CEE) with the opening of a new office in Sofia, Bulgaria, to meet growing demand in the region for professional advisory services.
Calash is pleased to announce that it provided commercial due diligence to the Scottish National Investment Bank on its investment into Leap AI, a low-cost industrial AI robotics company.
Calash is pleased to announce that it provided vendor commercial due diligence to EV Holdings (EV), a leading global provider of vision-based diagnostics and analytics services for the oil and gas sector, in support of its sale to Enersol, a joint venture between ADNOC Drilling and Alpha Dhabi Holding.
