From stakeholder experience to effective decisions

Our mission

The complexity of the modern world requires the involvement of many stakeholders to implement change. But many stakeholders means many views, which makes it hard to gain buy-in. And no buy-in means no progress.

DIEM’s mission is to help clients make decisions in a way that ensures the decisions are implemented. Our decision discovery’ approach captures stakeholders’ experience as part of the decision-making process, and gains the buy-in needed to implement the decision quickly and cost-effectively.

Our team

Our team has a wealth of experience across corporate, government, charities and social enterprises. We combine this with innovative techniques to help our clients make decisions in a way that generates buy-in from the stakeholders who are needed to help drive change.



Under the EU GDPR we are obliged to inform you that the personal data we collect is your name, email and phone number, in the form of your business card, emails stored in Outlook, and contractual paperwork. The lawful basis under which we collect this data is the performance of a contract to which you are a party, or the legitimate interests of securing mutually beneficial opportunities between ourselves and yourself. The purpose of the data is to progress these contracts or opportunities. It is not for the purposes of direct marketing. We will not sell your data, and we will not share your data without your permission.  We will only hold this data for the duration of a contract or whilst there is a chance of securing mutually beneficial opportunities. You have the rights of access, rectification, erasure, restriction and objection. We will not use your information for any automated decision making or profiling. You are under no statutory obligation to provide this data. You do have the right to lodge a complaint with the ICO. Our data protection officer can be contacted at

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