About Us

Clear Environmental Consultants Limited was founded in 2003 as a specialist consultancy in wastewater and environmental management. Clear was founded by Andrew Clements, David De Rosa and Jamie Margetts with the aim of creating a team of specialists and technical experts to deliver high quality, cost effective and innovative services.

Clear has been successful and has grown to service a number of UK Water Companies through direct framework appointments, plus a number of major public and private sector clients. Our success has been achieved by remaining true to our principles of delivering quality in an efficient manner.

One of our key strengths is that all senior staff and management remain fully ‘hands-on’ and engaged in technical project delivery with both staff and clients. Clear’s staff provide a wealth of specialist knowledge and expertise that is used to deliver pragmatic solutions in wastewater and environmental management.

Continuing our story, Clear Environmental Consultants Limited were acquired by the RPS Group plc in April 2014, allowing us to continue our success as Clear Environmental Consultants, a trading division of RPS Environmental Management Ltd


Andrew Clements

Andrew is a founding Director of Clear and is Principal Modeller running a team of 10 modellers, graduates and technicians, working on a range of DAP and InfoWorks model build studies for United Utilities, Anglian Water, and Severn Trent Water. Andrew has extensive experience in InfoWorks, InfoNet, MapInfo and MapBasic. Andrew is heavily involved in developing innovative techniques for DAP data analysis, developing automated routines for network cleanup, interpolation, structural analysis and impermeable area definition.

Andrew has over 15 years experience in hydraulic modelling, and has built and verified models for most Water Companies in the UK. Andrew is the Director with the responsibility for QA within Clear, and was responsible for the production of our in-house model build, verification and DAP procedures. These procedures are used as the basis for achieving consistency and quality, for training graduates in first principles, before aligning with the nuances of specific client methodologies.

David De Rosa

David De Rosa, with over 20 years experience in the wastewater industry, is a founding Director of Clear and has managed and been technically involved in a number of InfoWorks wastewater modelling and drainage design studies. Currently, David is commercial and programme manager for the Severn Trent DAP Framework, Anglian Water Network Modelling Framework and United Utilities Model Maintenance Framework. One of David’s roles is to work with clients to develop long term programmes of work to optimise the use of survey, contractor and consultant resources to deliver efficiencies.

David has a keen interest in sustainable drainage, and regularly undertakes outline and detailed designs for site-specific SuDs solutions. David also has overarching responsibility for the flood risk and ecology divisions at Clear, and spends part of his time coordinating integrated studies for local authorities and private developers, who require drainage, river modelling and environmental impact expertise.

Jamie Margetts, 1975 - 2016

Jamie Margetts  was a founding Director of Clear and had over 12 years experience in wastewater modelling. During this time he had been principal modeller, technical manager and was a Technical Director on a large number of wastewater and sewer modelling studies. Jamie had extensive experience in InfoWorks, HydroWorks, InfoNet, SIMPOL, UPM Tools and StormPac. As Technical Director on the Severn Trent and United Utilities DAP Frameworks, Jamie was responsible for ensuring the high standard of models for which Clear is known to produce. Jamie co-ordinated internal audits, reviewed every modelling report and was responsible for innovation to improve processes and deliver efficiencies within the modelling programme.

Jamie was CIWEM Urban Drainage Group Chairman, and was well known within the water industry as a modelling technical expert, having presented over 30 technical papers and led numerous workshops on integrated urban drainage, runoff modelling and rainfall modelling. Jamie had edited the WaPUG Integrated Urban Drainage Modelling Guide. Jamie had a strong interest in integrated urban drainage, and had been involved in numerous CIRIA, UKWIR, FWR and DEFRA workshops and forums developing strategy and technical methodologies for the implementation of
IUD and SWMPs.

Sadly Jamie passed away in October 2016.

Steve Hogg

Steve is a Chartered Civil Engineer with over 20 years professional experience in the UK Water Industry with the majority relating to drainage and wastewater projects.  He started his career within a Local Authority working as Sewerage Agents for Severn Trent Water where he gained a considerable range of experience of hydraulic modelling, feasibility, design, contract documentation, construction supervision and contract administration implementing sewerage projects ranging in value from £30,000 to £2.5 million.

Having moved into the consulting sector, in recent years Steve has balanced a continuing technical delivery role with that of Framework Manager delivering Severn Trent Water’s Drainage Area Planning programme in AMP3 and AMP4, as well as Anglian Water’s Asset Planning Support Framework in AMP4.  More recently Steve’s commercial experience has been utilised further filling the role of Framework Director on a number of major Asset Management Frameworks with Yorkshire Water, Wessex Water, South West Water, Anglian Water, Welsh Water and Severn Trent Water.

Steve has a significant amount of experience in Business Operations throughout his recent career and has specific responsibilities in Clear for the financial management and financial performance of the business, as well as compliance with our governance processes and helping to continue the growth of the company.

Business Managers

John Malone

John is Principal Modeller running a team of 10 modellers, graduates and technicians, working on a range of DAP and model build studies for United Utilities, Anglian Water, and Severn Trent Water. John has over 15 years experience in hydraulic modelling in InfoWorks and InfoNet, and has built and verified models as part of DAPs for most Water Companies in the UK. John has a particular interest in flow monitoring and the collection of accurate data for sewer model verification. John has developed techniques to test the calibration of flow data, improving flow estimates in non-standard pipe shapes, and has trialled live flow monitoring and web access technology for Severn Trent Water.

One of John’s roles is to ensure that correct resources are utilised on each aspect of a modelling job within his team. John is actively involved in many model verifications within the team, and also responsible for QA checks on the models and reports produced within the team. John is often involved in more detailed modelling applications to assist capital delivery and the detailed design process; recently undertaking highly detailed InfoWorks modelling for siphons, tunnels and
tank arrangements.

Iain McLachlan

Iain leads Clear's Glasgow office, overseeing a growing team of experienced modellers working on Drainage Area Studies, model maintenance and scoping studies primarily for Scottish Water. Iain has 14 years hydraulic modelling and sewer data collection experience for a range of UK Clients. These projects have ranged from Drainage Area Studies, flow and manhole surveys, scoping studies, flow and load studies, Development Impact Assessments through to more strategic large catchment projects.

Iain has previously been seconded into Scottish Water in a Technical Manager role and is using this experience to develop this partnership while ensuring the technical quality of all outputs from the team.