Meet our team

Aidan Holland combines his drive, passion and expertise to deliver the highest standard of service for all ACORN Water clients. He leads the team to ensure we create innovative solutions to even the most challenging problems. With 20+ years of experience, Aidan has honed his skills in the water and wastewater industry. His reputation for exemplary client engagement has helped him consistently exceed expectations and achieve outstanding results. Aidan holds a Degree in Business & Marketing and a Diploma in Business & Finance from Galway-Mayo Institute of Technology (now ATU). His qualifications also include a Certificate in Business Accounting from the Waterford Institute of Business and Technology. Aidan continues to be a lifelong learner, always seeking new opportunities to grow and develop his skills as the CEO of ACORN Water.

William Holland graduated with a B.Eng (Hons) in Mechanical Engineering at Cork Institute of Technology (now MTU). His additional academic qualifications include; CIWEM (Municipal Wastewater Treatment), CIWEM (Potable Water Treatment) and Delft TU (Nanofiltration & Reverse Osmosis Water Treatment). William has a proven operational and engineering track record and strong multi-sector experience across Utility, Manufacturing and Food sectors. He specialises in process optimisation and troubleshooting at Wastewater Treatment plants, including chemical selection and dosing controls, stormwater management and recovery, and the development of sustainability projects. William works as a Senior Environmental Liaison to the EPA and a Senior Water Utility Liaison on nano coagulants. His goal is to deliver outstanding results through a client-focused framework based on thorough interrogation of lab data.

Frank graduated from Cork Institute of Technology (now MTU) with a BSc in Pharmaceutical Biotechnology. During his studies, Frank took an elective Environmental Science module focussing on wet chemistry techniques to determine water and wastewater quality. He is currently partaking in a course in Municipal Wastewater Treatment. He has completed courses in Internal QMS Auditor based on ISO 9001:2015 training, Safe Pass, Forklift operation, Skidsteer operation and Telehandler operation. Frank is responsible for maintaining the standards and practices for ACORN Water’s Quality Management system. Frank has over ten years of experience testing private and public mains supply water and wastewater samples from the Agriculture, Dairy, Distillery and Pharmaceutical industries. Frank takes great pride in advising customers of results and determining if results comply with drinking water limits, discharge licenses, or waste permits.

Aislyng Gearty is an ACCA-qualified accountant with a Bachelor's Degree from Cork Institute of Technology (now MTU) in Business Studies (Accounting). Aislyng has worked in multinational firms as well as small/medium Irish-owned companies. She provides financial advice and expertise in relation to all accounting functions, including cash flow, credit control, costings, pricing and management accounts.

Sean supports our accounts department to operate effectively and efficiently. His training and experience as an accountant make him a safe pair of hands in our back office team.

Julie Harris is an Honours Arts graduate of University College Cork, where she studied English Literature and Psychology. Having worked in Film and TV production for over five years, Julie moved on to fundraising, marketing and communications in international, national and local charities. She is a veteran of creating and managing marketing, branding and communication campaigns across a range of Irish industries to build authentic relationships between clients and businesses. Julie aims to showcase ACORN Water's products and services to all our customers to help inform organisations of the technological advances that can transform their wastewater treatment plants.

Jeanell Martin is an Environmental Client Account Manager at Acorn Water, she brings over 8 years of experience in the wastewater industry to our team. She holds a Bachelor of Science in Chemical Engineering from Adamson University and a Postgraduate Diploma in Project Management from La Salle College of Saint Benilde in the Philippines. Jeanell is a registered Chemical Engineer with the Philippine Institute of Chemical Engineers and a certified Pollution Control Officer. In her current role, she manages the full client journey, from technical and commercial proposals to logistics, project delivery, and supplier procurement, while continuously expanding her expertise through programmes such as Safepass, Manual Handling, and cutting-edge wastewater technology training. Jeanell is driven by a genuine commitment to her clients, building trust through honest, knowledgeable support and positioning herself as a reliable go-to professional for any wastewater challenge.