Karl Zimmerer

Group Managing Director

Karl Zimmerer has over 25 years of experience in the design, construction and operation and maintenance of water and wastewater infrastructure throughout Ireland, with over 15 years in a Senior Management position. Karl’s professional qualifications include an Honours Degree in Structural Engineering and a Master Degree in Project Management.

Karl is a founding member of Glanagua Ltd and has successfully developed the business into one of the leading companies in the water services sector in Ireland providing a full range of services throughout the Industry.

Brendan Rouse

Operations Director – Industrial

Brendan Rouse is Operations Director of Industrial and has over 20 years’ experience in both the municipal and industrial water & wastewater sectors. With the team since 2014, Brendan provides valued consulting, support and leadership to our industrial team and client base.

Brendan is responsible for the strategic development and management of our industrial business including project delivery, manufacturing and R&D.

Paul Gardner

Group Development Director

Paul has over 15 years’ experience in the construction industry across multiple sectors (including mining and utilities) and has gained significant international exposure throughout his career in Ireland, Australia and the UK. His professional qualifications include an Honours Degree in Mechanical Engineering, Chartered Engineer (Engineers Ireland) and he holds an MBA from UCD Michael Smurfit Business School.

Paul is a founding director of the UK business, having joined the business in 2015 to spearhead the expansion of Glanua into the UK Market and was Managing Director of the UK Business until 2022, when he took up his current Group role focussing on furthering our ambitions across sectors and all regions. He is also a Statutory Director of the UK Business.

Andrew Young

Director of Operations UK and Ireland

Andrew joined Glanua (formally Glan Agua) in 2009 and since then has held various Engineering and Management positions before becoming Operations Director for Ireland in the Municipal Sector in 2022. He is a Chartered Engineer and holds a B.Eng. Hons in Civil Engineering & B.Eng. in Civil & Water Engineering. With over 14 years’ of experience working in the municipal sector, Andrew has worked on various large scale water & wastewater infrastructure projects and programmes.

As Operations Director for Glanua, Andrew’s key focus is to provide sustainable, robust and reliable solutions for our clients and deliver project objectives within programme, budget and to the highest Health, Safety, Quality and Environmental standards.

Andrew has extensive experience in his field and has delivered MEICA / Process design and contract management for numerous projects, including the award-winning Kerry Central Water Treatment Plant.

John Fox

Contracts Director

John holds a Ph. D. in Environmental Microbiology from NUI Galway. He has 15 years of experience in the water and wastewater sector. John has specific experience in the design, construction, commission, and operation of key water & wastewater infrastructure projects for Glanua.

John previously managed all Operations & Maintenance Contracts in Ireland including water and wastewater, the largest of these facilities is the Kerry Central Regional Water Supply Scheme which serves a population equivalent of 62,000 people, and has the capacity to supply 51,000 m3 of treated water per day.

Enda Flynn 

Finance Director

Enda Flynn assumed the role of Finance Director at Glanua in 2022. Enda is committed to implementing financial strategies that support the expansion of Glanua as it continues to thrive in the water and wastewater sector. Prior to joining Glanua, Enda accumulated a wealth of experience through his work with reputable organisations across UK and Ireland such as Chanelle Pharma, Kent Pharmaceuticals, Fannin Ltd, Tesco, and PWC. Enda is a graduate of the University of Galway, Ireland, and holds an MBA from Trinity College Dublin.

Phil Muir

Municipal Operations Director (UK)

Phil Muir joined Glanua in October 2023 and brings a wealth of experience and expertise to his role as Municipal Operations Director (UK) with a career spanning multiple senior positions in the water industry.

Prior to joining us, Phil held the position of Director of Projects and Programme at Jacobs and worked as Delivery Manager on the Thames Tideway Tunnel, a 25km ‘Super Sewer’ under the river Thames. Phil has also worked with leading organisations, MWH, Laing O’Rourke, and Ch2MHill.

Phil will lead our municipal operations in the UK providing support to our esteemed clients, Thames Water, Yorkshire Water and Affinity Water. Phil will oversee and execute critical projects such as Blackburn Meadows, Thames Water WAAP, Greenwich and Crossness that are central to the continued growth of Glanua with the UK.

Robert Kearney

Operations Director, Ireland

A graduate of University College Cork (BSc) and University College Dublin (MSc), Robert is an experienced engineering professional with over a decade delivering critical water and wastewater infrastructure across Ireland. Since joining Glanua during a period of rapid growth, he has progressed rapidly from Project Engineer through Project, Contract, and Framework Management roles to his current position as Operations Director. His career reflects Glanua’s commitment to talent development as a cornerstone of its growth strategy.

Robert has led several nationally significant projects, including the €25M National Disinfection Programme, upgrading over 200 water treatment plants nationwide, and the €5.5M Emergency UV Upgrade at Leixlip WTP, protecting supply for 750,000 customers. A key driver in the early adoption of the Early Contractor Involvement (ECI) Framework, he has championed collaborative delivery and innovation on complex capital projects ranging from €5M to €25M.

His expertise includes programme resourcing, collaborative delivery, commercial strategy, risk management, and safety excellence. Robert holds a Diploma in Project Management, is PSDP and PSCS certified, and has completed the CIF IOSH Safety for Construction Managers Programme. He plans to undertake an MBA to further develop his leadership and business capabilities within the construction sector.

David Slattery

Global Head of HR

David joined Glanua in 2025, bringing over 20 years of distinguished service with the Irish Defence Forces. A senior commissioned officer, he developed extensive expertise across military operations, training, HR, and public relations. His most recent domestic appointments included Director of the Officer Training Wing and Company Commander of Mechanised Infantry Units, with responsibilities spanning both national and overseas deployments.

Throughout his military career, David served on multiple tours of duty with the United Nations and EUFOR, including missions in Liberia, Lebanon, Chad and the Central African Republic, the Democratic Republic of Congo, Israel, and most recently Syria.

Following his transition from military service, David joined DPS Group Global in 2019, where he led the establishment and delivery of a new global Learning and Development function. His remit also included responsibility for Performance Management and Internal Communications until the company’s successful acquisition by Arcadis in 2022. He subsequently moved into the water sector, taking up a role with Uisce Éireann, where he established and developed a national Technical Learning and Skills Training function to support the transition of water services from local authorities to the national utility.

David holds degrees in Military Studies (Irish Cadet School), French, Sociology and Politics (University of Galway), and Human Resource Management (University of Limerick). He also holds postgraduate qualifications in Leadership, Defence and Contemporary Security (Maynooth University), as well as a Master’s degree in International Relations from Dublin City University. In addition, David is a qualified psychometric test user for ability and personality assessments and is an Associate Member of the Chartered Institute of Personnel and Development (CIPD).

Jon Waller

Sales Director – Industrial

Jon Waller is industrial Sales Director specialising in project and partnerships dedicated to operations and maintenance for industrial wastewater. Jon is the Founder and former Operations Director of Aqua Operations, which was acquired by Glanua in July 2024. He plays a key role in Glanua’s leadership team, supporting the growth and development of the operations and maintenance division.