Kostas Eftaxias

Principal Wastewater Modeller (Contract)

Arcadis | JUNE 2025 - Present | MANCHESTER, UK

South West Water Storm Overflows Program

• Plymouth Strategic Model Update: Modelling Lead of Plymouth Flow Survey Scoping and Management, Model Build and Verification (206 monitors). Automation of Interim Data Assessment (Volume Balance Assessment and Rainfall Assessment) using Python
• Maer Lane STW: Exmouth Catchment: Model Updates, Model Verification (18 monitors), Design Horizon Updates, Optioneering.
• Dittisham STW: Optioneering, Infiltration Assessment
• Heathfield STW Modelling: Wastewater Treatment Works Modelling

Thames Water AMP8 Program

• Modelling Lead for 18 Projects including: Model Build and Verification, Model Calibration, Flow Survey Scoping and Control, Model Updates, Detriment Analysis, Optioneering

Senior Urban Drainage Modeller

Stantec | JUNE 2024 - JUNE 2025 | WARRINGTON, UK

United Utilities AMP8 Framework

• Davyhulme Strategic Study: Modelling Lead of 250 monitors flow survey (Flow Survey and Asset survey Scoping, Pre-installation site visits, Flow Survey control). Model Build and Verification.
• United Utilities AMP8 & Better Rivers: Tintwistle & Middleton (Davyhulme) Asset Surveys, Model Updates and Model Calibration.

Senior Urban Drainage Modeller

Arup | APRIL 2022 - JUNE 2024 | MANCHESTER, UK

DCWW (Welsh Water) AMP7 Framework

• Lead modeller in wastewater modelling analysis for DCWW projects
• Denbigh TEN Scheme: Flow Survey scoping and management, Model build and Verification, Optioneering Shellfish Waters Schemes, Design Modelling / Nature Based Solutions, Strategic Optioneering, Model Build and Verification, SOAF and FHO studies.
• Bagnor Beach Road Shellfish Waters Scheme: Optioneering, Design Modelling Design Modelling / Nature Based Solutions, Strategic Optioneering, Model Build and Verification, SOAF and FHO studies.
• Chester Catchment Strategic Optioneering: Model Verification, Strategic Optioneering
• Treborth Spills Reduction Scheme: Optioneering, Nature Based Solutions development (Reedbed modelling)

Urban Drainage Modeller

Stantec | JULY 2016 - APRIL 2022 | WARRINGTON, UK

Southern Water AMP6 Drainage Area Plans

• Southern Water DAP and PR19: Model build and verification (Wateringbury and Sittingbourne Catchments), Needs assessment, Optioneering.

Scottish Water S16 and ICS Flood Risk Heat Maps

• Flood Risk Heat Maps Phase 2: Developed FME scripts, Flood Risk Assessment, Joint probability assessment for more than 100 catchments in Scottish Water Region.

United Utilities AMP7 Framework

• AMP7 Water Quality Conversions: Model conversions, WQ model updates, and calibration.
• SOAF / Bathing Waters: EDM data collection, spills assessment, CSO performance assessment.

Civil Engineer, Hydraulic Modeller

C.S. Consultants | OCTOBER 2015 - JULY 2016 | ATHENS, GREECE

• Kareas - Ilioupoli Storm Network Modelling and Design: Detail design of storm water network, hydrological and hydraulic calculations, Model Build, Final Design.
• Stalida River: Hydrological study, river flood zones analysis, Model Build & Optioneering.
• Agrinio's Rivers: Catchment hydrological calculations, Model build, Hydraulic calculations.

Graduate Civil Engineer

Bardakis Ioannis & Co. | OCTOBER 2014 - JUNE 2015 | ATHENS, GREECE

• Managed a team of 14 for traffic volume assessment for “Ionia Odos” highway.
• Conducted “Drama - Paranesti” railroad survey and mapping.
• Performed urban survey and mapping in Ano Voula, Athens.

Trainee Civil Engineer (Summer Placement)

Hellenic Ministry for the Environment and Public Works | JULY - AUG 2005 & 2006 | ATHENS, GREECE

• Gained familiarity with Road Works construction preliminary studies and Environmental Impact studies.