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20+
Years Experience
800+
Projects Completed
10k+
Global Experts
Energy & Industrial Sector Specialists

Practical insight.
Unlock growth.

Deep sector expertise across energy, industrials, infrastructure, cleantech, technology, marine, and defence — delivering strategy, diligence, advisory, and business service that creates real-world value.

Our Services About Calash

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.

About Calash

Seasoned expertise across 20+ years of complex challenges

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, cleantech, technology, marine, and defence 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 us
What We Do

Our capabilities

All services

Research

Primary research and market referencing leveraging our extensive multi-sector network built up over decades, to enable evidence based decision making.

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Strategy

Practical, straight-talking growth strategies that enable businesses to realise value effectively and navigate rapidly evolving markets.

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Diligence

Buy-side and sell-side commercial, technical, operational and environmental due diligence underpinned by 800+ completed projects — giving investors and acquirers the confidence to act.

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Environment

ESG advisory backed by operational expertise; in addition to our environmental due diligence and consulting work, the Calash environmental team supports businesses in the treatment of industrial effluent, water reuse, legionella testing and compliance.

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Sector Focus

Unrivalled experience across energy & industry

Over 20 years of deep, hands-on expertise across the sectors driving the global energy transition, industrialisation, and infrastructure build-out.

01

Heating & Energy

District heating, heat networks, gas, hydrogen and conventional energy systems

02

Renewables

Wind, solar, hydro, biomass and hybrid renewable technologies

03

Energy Storage

Battery, LDES, pumped hydro and grid-scale storage solutions

04

ClimateTech

Carbon capture, clean fuels, climate analytics and decarbonisation platforms

05

Green Economies

Green hydrogen, sustainable finance, circular economy and impact investing

06

Industrials & Manufacturing

Industrial decarbonisation, advanced manufacturing and process optimisation

07

Infrastructure

Energy infrastructure, utilities, transport and critical national infrastructure

08

Chemicals

Specialty chemicals, petrochemicals, agrochemicals and chemical processing

09

Marine & Ports

Maritime operations, offshore energy, port logistics and marine technology

10

Technology

Energy software, digital infrastructure, IoT and industrial technology platforms

11

Defence

Defence-aligned industrial, maritime and critical infrastructure systems

12

Environment & ESG

Environmental compliance, impact assessment and ESG due diligence

20+
Years of sector expertise in energy and industrial markets
800+
Projects completed in diligence, strategy, and advisory
5
Offices across UK, EU and Australia with US representation
10k+
Global network of sector specialists on call worldwide
Our Approach

Been there. Seen it. Done it.

01

Hands-on senior expertise

Our senior team has first-hand experience of founding, running and monetising their own businesses in the sectors we advise on.

02

Data-led market analytics

We pair deep sector knowledge with rigorous data analysis to overcome challenges, identify market opportunities, and target growth.

03

Global reach, local presence

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.

04

Concise, commercial outputs

We deliver pragmatic, straight-talking strategies and reports — no padding, just the insights that matter.

Global Network
A global network of specialists
10,000+

Calash has direct access to over 10,000 experts globally — meaning in-market insight is only a phone call away, wherever in the world your challenge lies.

Client Feedback

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. Their commercial due diligence will help us guide the business into its next phase of growth.

Investment Manager
Foresight
"

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.

Chief Executive Officer
EV Holdings
"

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.

Director
Strada Partners

Trusted by leading private equity, investors & corporates worldwide

Carlyle
Cinven
Inflexion
Baker Hughes
LDC
Altrad
Bridges
Safelane
OEG Renewables
The Crown Estate
SNIB
Petronash
PDMS
Longacre
Arq Energy
Windlogix
Calash
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