Prisma.M was founded by Mattijs Messely, a policy maker and trainer with several years of experience in inclusion and diversity, strategic management, client-focused consultancy, and organisational development.

You can turn to me for:

  • Consulting services

  • Organisational development

  • Training

Together, we explore the best way to map and address the needs of your organisation. You can count on me to approach this from:

  • Design principles. By daring to innovate, working with various methodologies, and continuously improving, we create sustainable solutions for your operations and services.

  • Cooperative working. I can help you work with all relevant stakeholders to achieve clear and concrete interventions.

  • Developing leadership competencies through training. Navigating a diverse society or organisation as a leader is not straight-forward.

Are you ready to create impact together? Get in touch to find out what I can do for your organisation.

PRisma.M

Your partner in Policy and organisation development

A man with a beard and short hair, wearing a maroon jacket and a watch, standing with arms crossed in front of a modern building with black metal panels and stairs.

Services

Consulting

You can rely on me to deliver tailored solutions and to think in terms of your needs as a client. Together, we determine the scope, timeline, and objectives of the assignment.

You can involve me at any stage of a process or project to add value. Conducting an audit of your existing operations and services is also possible.

Prisma.M works with both non-profit and commercial organisations across Flanders, Brussels, and the Netherlands.

Organisational Development

With me, you won’t receive a one-size-fits-all checklist or a rigid approach that doesn’t fully align with your needs. I work transparently and can flexibly navigate various methodologies.

Together, we ensure results that are sustainable and future-proof. You can count on me to work on your organisational structures, culture, and leadership competencies.

Training

Thanks to my experience in inclusion and diversity, you can turn to me for a wide range of one-off workshops or tailored training programmes. Feel free to get in touch to discuss the options.

In the spring of 2026, I will launch an open programme of workshops for HR professionals, managers, and policy advisors. You can find more information under ‘Training’.

Portfolio

Strategic policy development

  • Coordinating decision-making processes to achieve common strategic objectives, KPIs, and actions

  • Project and process management

  • Developing and monitoring target-group-specific policy frameworks on topics such as neurodiversity, racism, LGBTQIA+, people with disabilities, refugees, and religious diversity

  • Client-focused advice within the framework of equal opportunities legislation for:

    • Local authorities

    • Civil society organisations

    • Primary, secondary, and higher education

    • The real estate sector

    • Human resources professionals

  • Coordinating and supporting awareness-raising initiatives related to the Sustainable Development Goals and Corporate Social Responsibilityy

Organisation development

  • Guiding and supporting team development processes as a manager

  • Coordinating multidisciplinary and target-group-specific Employee Resource Groups (e.g., neurodiversity)

  • Applying various theoretical frameworks for organisational development

  • Improving Human Resources processes in the areas of:

  • Recruitment and selection

  • Reasonable adjustments and retention policies

  • Wellbeing and social safety in the workplace

Training

  • Developing in-house training policies for employees

  • Training on equal opportunities legislation for staff of local authorities and public social welfare centres (OCMWs)

  • Training for local police zones

  • Diversity-awareness training