Your Plant, Your Way.
The people behind Neptune.
Neptune was born on the plant floor, not in a boardroom.
Founded in Cork in 2019 by Finbarr Pyne and Declan Costigan, Castlegale Environmental has spent years advising Ireland’s leading dairy, pharmaceutical, medical device and industrial facilities on waste water compliance and process optimisation. Time and again, we saw brilliant plant teams held back by the same bottleneck: critical treatment data buried in fragile spreadsheets, paper clipboards and disconnected email threads.
Supported by the Local Enterprise Office (LEO) and Enterprise Ireland, and developed in collaboration with the CTO of an Enterprise Ireland HPSU-backed startup, we built Neptune to bridge the gap between environmental science and modern software. Proudly Irish-owned and developed in Cork, we cut through the red tape to give every facility a platform moulded to their exact plant, backed by real scientists you can call or bring on-site whenever you need us.
Hover or tap a profile to meet the scientists and developers behind Neptune.
BSc Chemistry
Co-founder of Castlegale Environmental with over 20 years of senior technical, commercial and operational leadership across the water, chemical and manufacturing sectors. Finbarr specialises in chemical process optimisation, effluent licence compliance, and translating complex plant chemistry into practical commercial results.
Postgraduate Environmental Science
Co-founder of Castlegale Environmental bringing 20+ years of high-level experience in environmental consultancy, biological treatment optimisation and waste management. Declan works directly with industrial facilities on-site to streamline compliance, manage sludge and effluent strategy, and represent clients to the EPA.
BSc Physics
Bridges rigorous analytical modelling with intuitive, human-centred design. Matylda leads Neptune’s visual architecture, data visualisation workflows and front-end experience, turning complex multi-parameter plant datasets into clean, high-speed interfaces that operators love using every day.
MSc, BSc Biochemistry
Combines advanced training in biochemistry with hands-on waste water analytics. Tom configures Neptune’s bespoke biological parameters, laboratory calculation logic and automated reporting templates to ensure every client’s digital platform reflects the exact science of their treatment plant.