Caley Water have a highly experienced team of hydraulic engineers, with a range of backgrounds which provides a broad foundation of knowledge of the water industry. We are led by chartered professionals, and pride ourselves on being a close knit adaptable team.

We are always open to hearing from people looking for careers in the sector, so if you think you would be a good fit within our company then please get in touch!



Paul Nash is a Chartered Civil Engineer who obtained his post graduate industry experience working with Hyder Consulting and Atkins.

He founded Caley Water in 2006 as a water and environmental consultancy initially supplying hydraulic modelling services to Atkins & Scottish Water Horizons. Since this time, under Paul’s leadership the company has continued to grow and develop its range of services and client base. Paul is the Managing Director of Caley Water overseeing its commercial and technical operations as well as undertaking the key account management for Scottish Water Horizons.



Ross McKinney is a Chartered Civil Engineer who obtained his post graduate experience, in the water and environment sector, initially with Hyder Consulting before moving to New Zealand for two years to work for SKM.

Ross then returned to the UK to work as a Principal Engineer and Team Leader with Atkins prior to joining the management team of Caley Water in April 2012. Ross is a Director of Caley Water undertaking key account management for Scottish Water and he provides technical leadership to the project team; as well as assisting with the company’s commercial & HR operations.



Graham Nash is a Chartered Accountant having trained with KPMG in Edinburgh.

Following qualification in 1993 he joined the finance division at Bank of Scotland as part of the Group Financial Management Reporting team. In 1997 he joined Kwik-Fit as Business Analyst. In 2000 he launched a retail business in Central Scotland which quickly became a market leader in its sector. Following the business sale in 2007 he took up a financial trading role. He currently advises and assists a number of SMEs in various industry sectors. Graham’s primary role is the Finance Director of Caley Water overseeing the company’s accounts and assisting on many commercial aspects.



Tom Liddell is a Chartered Chemical and Environmental engineer with extensive experience in Process Operations and Process Design.

He has a diverse range of skills in the Design, Construction of Process Operations which is further augmented by an array of Environmental & Waste Management competencies. Tom acts as an Environmental Consultant to Caley Water and oversees many of the Training Operations including the management of Water Jetting Association accredited training courses.



Michael has been a part of the team for 8 years, joining in March 2013 as a graduate and working his way up to a Principal Modeller. He attained an MEng (hons) in Civil Engineering with Construction Management in 2012 and became a chartered civil engineer with the Institution of Civil Engineers (ICE), obtaining CEng status in 2018.

Michael has gained a wealth of experience working on a large variety of modelling projects, including 1D and 2D modelling, design support and aesthetic studies. He now oversees a team of modellers working towards the delivery of Network Impact Assessments for Scottish Water.



Colin Williamson is a chartered civil engineer, and works as a principal Hydraulic Modeller at Caley Water. He joined in 2012 after he graduated from the University of Edinburgh with a MEng in Civil and Environmental Engineering, and went on to pass his Professional Review with the Institution of Civil Engineers (ICE) in 2018.  Colin has extensive experience in all aspects of Drainage Area Planning, including growth assessments, solution development, 2D modelling and flooding investigations, and takes a lead role in the delivery of all project work within Caley Water. Colin has built and verified integrated catchment models, is experienced with industry standard practices, has supported the detailed-design of a number of capital investment schemes and is also an approved model auditor. 



Nico is a Senior Hydraulic Modeller at Caley Water, having joined in November 2016 as Graduate Modeller. He graduated from the Université Catholique de Louvain in Belgium in August 2015, where he studied Environmental Engineering. 

Following a stint of working in defuse wastewater treatment and soil hydrodynamic modelling, Nico picked up sticks and headed to Scotland. After securing a job at Caley Water, Nico has become involved in many areas of the company, including Network Impact Assessments, model builds and verification, and more recently, a basement flooding study in Toronto, Canada! 



Mark Campbell is a hydraulic modeller, who attained a MEng in Civil Engineering from the University of Edinburgh in 2017. He joined Caley Water initially as a summer intern in 2016, before he joined full-time in September 2017.

Mark has worked on a breadth of project types, covering various stages of the project lifecycle, ranging from model building, maintenance, verification to various model feasibility studies both development based and catchment wide. He also acts as the training and development coordinator for Caley Water, whilst maintaining University, School and Apprenticeship organisation connections for internship and research opportunities.

logan eicholzer


Logan joined Caley Water in September 2021 as a Graduate Hydraulic Modeller after receiving her MSc in Environmental Sustainability from the University of Edinburgh. During her undergraduate degree, she studied Environmental Systems Science at the University of Wyoming in the United States, graduating with a First Class Honours. She is working on a variety of projects for the company including Development Impact Assessments and Model Maintenance.



Terri is a Hydraulic modeller who joined Caley Water in 2017. She studied Environmental Science at the University of Birmingham and undertook a placement year with the National Institute of Water and Atmosphere in New Zealand. Terri has worked on a range of projects, including Development Impact Assessments, Model Build and Verification, Surface Water Assessments and Aesthetic studies. She has a wealth of experience in survey management and regularly undertakes site supervision as part of the aesthetics program. Terri oversees the company marketing for Caley Water which includes website maintenance, blog posts and social media.  



 Alex is a Chartered professional Civil engineer with 46 years’ experience in the Water, Wastewater and Construction Industry. 

He is also experienced in the Management of the design process, and his responsibilities included supervision of project design, work planning, checking design calculations and design drawings, monitoring design quality output, carrying out Health and Safety design reviews, control of the resource/ financial aspects of the design function, identification of business risk issues, project progress measurement and delivery of program to budget and time. He has also Project Managed a multitude of high value Water and Wastewater Treatment works projects including major UID programs.


Jamie Paterson joined Caley Water in July 2021, having graduated with a First-Class Honours in Geography (BSc) at the University of Edinburgh earlier in the year. During his degree Jamie particularly enjoyed using Geographical Information Systems (GIS) and various modelling software to come up with answers to environmental problems. In his new role at Caley Water, Jamie is using hydraulic modelling in a range of projects such as Development Impact Assessments.