Built by practitioners.
Trusted by the market.
An international management consultancy combining over two decades of private and public market advisory with deep operational experience across energy, industrials, infrastructure, cleantech, technology, marine, and defence.
Calash is an international management consultancy combining over twenty years of private and public market advisory with decades of operational experience in the energy, industrials, infrastructure, cleantech, technology, marine and defence industries — earning its position through direct experience of building businesses and creating value.
Seasoned expertise across 20+ years of complex market challenges
Our founders began their careers in the energy industry as geophysicists and engineers, working for the likes of Shell and Schlumberger, before carving their own paths and founding, growing and monetising their own technology and service businesses serving the oil and gas and environmental sectors.
In an office in Aberdeen in 2002, Calash was born because the capital markets did not fully understand the commercial and technical complexities of the energy sector. Through the early 2000s, Calash became established as the pre-eminent strategy and due diligence advisory firm focused on the oilfield services sector.
As the energy sector changed, so did Calash, attracting new expertise across renewables and the environmental sectors, and increasingly focusing on broader industrial verticals. In 2024, Calash formalised its offering into four service lines; Research, Strategy, Diligence and the Environment.
Today, over 75% of our work faces into the clean energy, infrastructure and industrial markets. We have engaged in projects on every continent bar Antarctica. Our people bring wide-ranging industry and professional backgrounds, united by a passion for technology, growth and straight-talking advice.
“There is no wasted space or fillers in our reports, just real, tangible insights and solid, quantifiable recommendations that help unlock growth. Calash exists to ensure human and financial capital is directed into sustainable growth opportunities.”
Three businesses.
One integrated group.
The Calash Group connects flagship advisory, expert network access and environmental expertise under one roof, enabling clients to draw on a uniquely broad range of capabilities across the energy and industrials spectrum.
Calash
The flagship due diligence and strategic management consultancy. Works with businesses and investors throughout the entire growth journey, from initial market investigation and commercial due diligence through to strategy execution and integration support. Extensive, diverse knowledge applied across energy, industrials, infrastructure, technology, marine, and the environment.
Candour
An expert network provider and strategy consultancy delivering trusted insights to grow business value and assess new markets. With access to over 10,000 industry professionals, Candour delivers bespoke voice-of-the-customer, market referencing and expert engagement exercises, operating independently, and alongside Calash on most projects.
EP
Wastewater treatment and environmental risk consultancy. EP completes the Group’s capabilities, ensuring that environmental due diligence, sustainability advisory and environmental solutions sit alongside commercial and strategic advice, critical as ESG and the energy transition move to the centre of every investment decision.
Unrivalled experience across energy & industry
Over twenty years of deep, hands-on expertise across the sectors driving the global energy transition, industrial modernisation and infrastructure buildout. Existing clients pull us into adjacent sectors, deepening our knowledge as markets evolve.
Energy & Oil & Gas
Conventional energy, oilfield services, midstream, downstream and energy transition services
Renewables
Wind, solar, hydro, biomass and hybrid renewable technologies across onshore and offshore
Power & Utilities
Grid infrastructure, electricity retail, heat networks and distributed energy systems
Industrials & Manufacturing
Industrial decarbonisation, advanced manufacturing, process optimisation and supply chain
Infrastructure
Critical national infrastructure, utilities, transport and built environment advisory
Marine & Subsea
Maritime operations, offshore energy, port logistics, vessel services and marine technology
Cleantech & ClimateTech
Carbon capture, clean fuels, energy storage, climate analytics and decarbonisation platforms
Technology
Energy software, digital infrastructure, industrial IoT and automation technology platforms
Chemicals
Specialty chemicals, petrochemicals, agrochemicals and chemical processing services
Transport & Logistics
Commercial vehicles, logistics infrastructure, fleet electrification and mobility services
Defence
Defence-aligned industrial, maritime and critical infrastructure advisory
Environment & ESG
Environmental compliance, impact assessment, wastewater and ESG due diligence
Unrivalled access to the people who know these markets best
Candour is a standalone expert network within the Calash Group, with access to an extensive, hand-picked network of industry professionals ranging from operational through to C-suite, across all sectors Calash serves. It provides unparalleled knowledge to validate research findings and deliver voice-of-the-customer insight on every engagement, operating both independently and alongside Calash on most projects.
What our clients say
The Calash team was responsive, detail-orientated and intuitively knowledgeable about the commercial and technical considerations associated with the offshore energy sector. Its commercial due diligence will help us guide the business into its next phase of growth.
Calash was able to consider all major attention points, from regulation, competition, market drivers, etc. in a conclusive and efficient way. The team was swift, responsive and detailed and became a key part of our efforts during the divestment process.
The Calash team provided invaluable support on our investment. Its sector knowledge and attention to detail were critical to understanding the competitive position in a fast-changing energy market.