Who we are.
CreateBig are trusted spatial and data specialists who have spent more than 20 years delivering impactful, tailored data and spatial solutions that solve real-world challenges.
Diverse perspectives
and unique talents.
We recognise that diverse perspectives and unique talents enrich our work and drive innovation. Honouring the strengths and identities of everyone in our team helps us cultivate a dynamic and inclusive environment that celebrates individuality and personality.
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Andrew is a geospatial data leader passionate about using technology to solve real-world problems and empower communities.
With over 20 years of experience in public and private sectors, he has led cross-disciplinary teams working on forest and management, climate risk and data analytics.
Andrew brings a rare blend of technical depth, policy insight, and systems thinking — always focused on outcomes that support people and planet.
He holds a PhD in machine learning and remote sensing, and continues to advocate for inclusive, values-driven digital transformation in the environmental and data sectors.
Andrew Mellor
Co-Founder
Trina Welsh
Co-Founder
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Trina is a passionate advocate for thoughtful, human-centred technology. With over two decades of experience, she combines deep expertise in solution architecture, business analysis, and geospatial systems with a sharp strategic mindset.
Trina thrives on untangling complexity — designing smart, beautiful, scalable solutions that bring clarity, connection, and lasting value. Her work is grounded in curiosity, collaboration, and a belief that data and technology, when used wisely, can drive meaningful progress for communities and the environment.
Erin Koletsis
Spatial Analyst
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Erin is a proud Bundjalung woman and skilled spatial professional with a background in GIS, spatial analysis, data administration, and software testing. Passionate about Indigenous data sovereignty, she combines technical expertise with a commitment to empowering communities through spatial tools, business intelligence, and clear, user-focused communication.
Andrew Collins
Spatial Data Engineer
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Andrew is a senior spatial systems and data integration specialist with deep expertise in designing scalable, intuitive geospatial solutions. He works across FME, ESRI, SQL, and web technologies—combining automation, analysis, and application development with a user-focused approach to solve complex spatial challenges.
Kerri Gray
Client Innovation & Delivery Manager
Antoine Ratat
Full Stack Web Developer
Fraser Church
Spatial Data Engineer
Evans Ndun’gu
GIS Analyst
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Fraser blends deep technical expertise with a passion for user-centred design. With experience across New Zealand and Australia, he builds scalable GIS tools using FME, Esri, and web platforms—creating geospatial solutions that are intuitive, engaging, and grounded in real-world needs.
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Evans is a versatile spatial professional with expertise in GIS, remote sensing, and data visualisation. Passionate about learning and problem-solving, he applies geospatial analysis, machine learning, and tools like Python, Power BI, and ArcGIS to create impactful, data-driven insights for complex challenges.
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Antoine is a seasoned Frontend Developer with deep experience in cloud infrastructure, software development, and IT security. Skilled in building and scaling web applications, he brings expertise in hosting environments, database management, and secure, high-availability systems across diverse technology stacks and cloud platforms.
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Based in Christchurch, New Zealand, Kerri is a digital innovator and delivery specialist with almost 20 years of experience. She blends expertise in business analysis, digital twin technology, GIS transformation, and large-scale software delivery—translating complex needs into clear, practical solutions that drive meaningful outcomes for clients.
