Organisations
Amsterdam
Frankfurt am Main
London

Leadership with Purpose, Strategy with Impact

At Calderon Search & Advisory, we partner with organisations seeking more than short-term solutions – those committed to shaping a better future through purposeful leadership. Whether you’re navigating transformation, building out a sustainable growth strategy, or preparing for succession, our executive search and and leadership advisory & assessments services are designed to meet your organisation’s ambitions with integrity, insight, and bold thinking. We bring deep industry expertise, a values-led approach, and a commitment to ESG and long-term impact, helping you attract and develop leaders who don’t just fit the brief, but advance your mission.

Search and Advisory for a Better Future

At Calderon Search & Advisory, we help organizations shape the future of leadership – not just by finding the right people, but by enabling them to thrive. Our work spans two interconnected practices: 


Executive Search and Leadership Advisory & Assessments. Through Executive Search, we identify and attract leaders who align with your purpose, culture, and long-term goals – from board and C-suite placements to succession planning and executive market mapping. Through Leadership Advisory & Assessments, we offer strategic guidance, leadership assessments, and organisational insight to support transformation, build resilience, and drive sustainable progress.

Rooted in a deep understanding of ESG, sustainability, transformation and sector-specific dynamics, we operate at the intersection of people and strategy. Our clients partner with us not only for our expertise, but for the way we work – with integrity, bold thinking, and a commitment to lasting impact.

Purpose-Led partnerships

We align every engagement with your mission, delivering leadership solutions that drive both performance and positive impact.

Expertise with depth and direction

Our combined strength in executive search and leadership advisory ensures holistic guidance, grounded in deep industry and ESG insight.

Agile, boutique-style service

As a small and niche player firm, we offer tailored, high-touch collaboration, with the agility to adapt and the conviction to challenge.

Sustainable impact

We build leadership teams and strategies that endure, advancing long-term value for your organisation, stakeholders, and the world

Ready to shape what’s next? Get in touch with Calderon Search & Advisory to start a conversation about purposeful leadership and transformative impact.

What Our Clients Say Speaks to Who We Are.

Trusted by leaders navigating complexity, transformation, and growth — our impact is best reflected in the voices of those we’ve partnered with.

I have worked with Harco on several sustainability positions in our organization. Harco convinced me through his concise and clear approach as well as customer-first principle. I have always felt the needs of my organization were cent...

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Jeroen Voorhuis

Director Landscape and Carbon...

I had the privilege of meeting Harco at a pivotal moment in my career — and I can confidently say he’s one of the rare people in this space who truly understand both sustainability leadership and the human dynamics behind it. Har...

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Otto Luis Barnert

Senior business Developer at Remov...

Harco placed me for a previous sustainability role and helped to facilitate my move from the US to the Netherlands. I had a great experience in working with him; he has an extensive network of sustainability experts and guides compani...

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Nichole Chan

Sustainability and ESG Expert

I had the pleasure to work with Harco on a job placement and was absolutely impressed with his approachability, clear vision, and support. As a sustainability professional, I appreciate Harco's knowledge and expertise in relation to s...

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Leigh Pezzicara

VP Sustainability @ La Prairie Swi...

Working with Dagmara has been a great pleasure - she is a seasoned professional with extensive market knowledge on sustainable development as well as having a wide network of firms and specialists active in the field. Her pro-active w...

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Daan Schipper

Sustainability, ESG & Impact

I have worked with Dagmara on several sustainability and procurement hires. Dagmara showed to be very proactive, coming up with good candidates and proper profiling and background on all of them. Would work with her again any time!...

Robert van den Breemer

Chief Commercial Officer at Those ...

Dagmara is the most proactive recuiter I have ever worked with and supported me to secure my most recent role. Throughout the process she remained in touch and I felt that she genuinely cared about securing the right position for me t...

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Fiona Hyde MIEMA CEnv

Head of Sustainability at Santande...

Dagmara was by far the best recruiter I worked with, in my recent job hunt. She demonstrated a genuine interest in my professional career and interests, she was present throughout the journey was always with a light touch. Dagmara was...

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Sara Ferretti

Associate Director - Sustainabilit...

I owe to Anne one of the best moves in my career, as she was instrumental in hiring me into Amcor Flexibles. With a clear talent about screening the market over different countries, Anne had been able to "find" me on the recruitment m...

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Eric DARRAS

Vice-President Operations EMEA at ...