Sustainability,
turned into action.
Ontos helps businesses, investors and financial institutions turn sustainability priorities into practical strategy, stronger decisions and lasting progress.

01Services
Five ways to work together.
From a defined advisory question to embedded leadership that owns the work end to end.
A strategy is only useful if it decides something. Ontos helps you set priorities, design governance and build a roadmap that holds up in day-to-day work, then defines the KPIs and targets to track it. The result: a prioritised set of objectives, a governance model, a sequenced roadmap and decision materials ready for management or the board.
Explore moreResponsible investment only works when it lives inside the investment process, not beside it. Ontos builds policies and frameworks your teams can actually use — from exclusions and ESG integration to sustainable finance frameworks for labelled instruments. What you're left with: a strategy and policy, integration procedures, and materials ready for investment committees and boards.
Explore moreGood due diligence answers the question a decision-maker is actually asking, not just a score. Ontos assesses sustainability risk across deals, managers and portfolios — including climate and nature-related exposure using methods such as ENCORE — and sets out what it means for the investment, with findings written for the committee that has to decide and a follow-up plan with owners and timelines.
Explore moreReporting is the visible end of a longer chain: collection, validation, calculation and judgement. Ontos strengthens that chain — GHG accounting, gap assessments against CSRD, ESRS, SFDR and TCFD, and disclosure reviews — leaving behind a documented, repeatable reporting process, not just a one-off set of figures.
Explore moreSome sustainability questions need more than advice — they need someone to own them. As an interim sustainability manager, Ontos works inside your organisation with a defined mandate, clear priorities and a planned exit, building internal capability as it goes. The outcome: continuity, named ownership and a clean handover.
Explore more
02Approach
From complexity to meaningful progress.
Every engagement starts by understanding the challenge, identifying what matters most and turning it into a practical next step.
- 1
Understand
Get the full picture — your context, constraints and what’s already been tried.
- 2
Prioritise
Separate what matters most from what can reasonably wait.
- 3
Act
Turn the plan into decisions, work and delivery.
- 4
Improve
Review what’s working, and strengthen it for next time.
Let’s make progress practical.
Have a sustainability challenge you’re working through? Let’s talk about what would help.