Recruitment & Consulting
Building teams that drive a sustainable future.
With roots in renewable energy, our reach extends to industries that are shaping a sustainable tomorrow, building exceptional teams where leadership, vision, and delivery matter most.
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Recruiting for what's next.
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.
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)
Explore the seismic shift in the renewable energy sector, not just in how we power the world, but how we build teams to lead that charge. From the birth of new green jobs to the fusion of AI and human insight in recruitment, the future is being built right now. Sustainability must be rooted not just in technology but in people.
Explore the fastest-growing roles in renewables, from wind techs to AI-powered energy analysts, find out where the demand is surging.
See why technical skills alone aren’t enough, discover the new “green leadership DNA” shaping tomorrow’s energy trailblazers.
Get the stats that matter, with 16.2 million jobs and counting, find out how the renewable workforce is outpacing fossil fuels.
Uncover the human side of the green transition, why emotional intelligence, purpose, and values are now front and centre.
Learn how tech is transforming recruitment, from predictive hiring to virtual site tours, but why the human touch still leads.
Build your sustainable hiring strategy, the 3 pillars every future-ready energy organisation must invest in before 2035.
Download Our Free Report
Hear from some of our clients...
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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!
Unique, Friendly & Considered Approach
Alastair Murray
CEO and Founder
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.