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At Hummingbird Recruitment & Consulting, we work with organisations leading the transition to a more sustainable world, connecting them with forward-thinking leaders who are ready to shape what’s next. Whether you're growing a green tech startup or transforming a global enterprise, we help you find the talent to take the next step with purpose and confidence.
Recruiting for what's next.
Because the right people matter.
Mariken O’Donnell founded Hummingbird Recruitment & Consulting with a clear mission: to connect visionary talent with organisations shaping a more sustainable world. With over 15 years of experience in executive search and a background in education and environmental responsibility, she brings a rare blend of empathy, expertise, and insight to every partnership.
Mariken’s approach is deeply personal, grounded in values, driven by relationships, and focused on long-term impact. Under her leadership, Hummingbird has become a trusted ally to businesses and leaders navigating change with purpose.
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Mariken O’Donnell
Managing Director (MdMgmt, BPhysEd, DipTeach, FREC)
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In an industry where purpose and progress go hand in hand, success depends on the people behind the mission. This guide explores how purpose driven businesses in renewables, infrastructure, and data centres can build high-performing teams that deliver commercial results while creating a cleaner, greener future. Discover why purpose aligned talent is transforming performance and how to attract, engage, and retain the people who will power your next phase of growth.
Purpose Drives Profit
Purpose-led organisations achieve 3.1% higher operating profit margins and are significantly more likely to experience growth than those without a clear mission.
People Power Progress
58% of purpose-driven organisations achieved over 10% growth in the past three years—while just 42% of others kept pace.
Sustainability Wins Investors
Companies integrating sustainability into their strategy deliver 7% higher annual shareholder returns than the broader market.
Hear from some of our clients...
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Unique, Friendly & Considered Approach
Alastair Murray
CEO and Founder
A company is only as good as its people, and my company is much stronger thanks to Hummingbird. Mariken took her time to understand the business and the role and was able to offer valuable advice and insight to tailor both the role and the search and maximise the chance of success.
Her communication was excellent, and she was pleasure to deal with at all times. I have been told a few times by candidates we have hired, that they had no interest in looking for a new role, and consistently rejected approaches by recruiters, but when Mariken reached out her approach was unique - friendly and considered - and before they knew it they were applying for a new role with Rendesco!
Latest Articles
Explore our latest insights on leadership, sustainability, and the future of purpose-driven work with fresh perspectives to help you stay ahead.
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Whether you're looking to build your leadership team or explore your next career move, we'd love to hear from you. Reach out and let’s start a conversation.