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Our Team

Niall Duffy
Operations Manager
As Operations Manager at Concrete Obsession Ltd., Niall plays a pivotal role in turning bold architectural visions into flawless concrete realities. With extensive experience in project coordination, site management, and workflow optimization, [he/she/they] ensures that every phase of the build runs with precision — from planning and logistics to execution on site.
Niall is driven by a passion for craftsmanship and a relentless focus on detail, overseeing teams and resources to deliver exceptional results on time and within specification. Known for problem-solving under pressure, he thrives on complex projects that challenge conventional approaches.
With a collaborative mindset, Niall works closely with architects, builders, and clients, maintaining clear communication and ensuring that Concrete Obsession’s high standards of quality and innovation are upheld on every job.
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Joyce Ungco
Office Manager
With a strong background in administration from the Philippines, Joyce plays a vital role in the smooth running of our business. She handles accounts, client support, and all admin functions with precision, while also managing our project management system to keep schedules, workflows, and documentation on track. Joyce supports both office and field operations, ensuring clear communication and efficient processes across the board. Her love for spreadsheets, structure, and well-organised systems makes her an essential part of the team.

Kristen Pickering
CEO, EZ Group
Kristin leads with a passion for leadership, financial clarity, and helping people grow. While she doesn’t come from concreting background, she brings a wealth of experience from growing up on a dairy farm, where she learned early on the importance of financial data and analysis. She’s also an qualified Rural Firefighter and did 3 years as Volunteer with FENZ and was proud to be selected for two national deployments — one for flood response in the top of the South Island and another for a wildfire in Twizel.
These experiences shaped her calm, strategic approach to leadership.
With advanced training in cognitive behavioural coaching and leadership development, building internal systems that work, ensuring our team is supported, and our clients are well taken care of. She works closely with Niall and Joyce to review financials, align daily operations with long-term goals, and keep the company on track—always guided by our core values of communication, integrity, knowledge, and collaboration.
Kristin is also responsible for all the big-picture thinking across the EZ Group, driving long-term strategy, innovation, and growth. She’s passionate about using social media to educate, connect, and uplift both our team and the wider community. For her, success isn’t just measured in numbers—it’s about creating a positive company culture and making a meaningful, lasting impact in everything we do.