Senior EC&I Engineer Template

Job Title: Electrical & Instrumentation (E&I) Design Engineer

Industry: Water Supply & Sewerage Infrastructure
Department: Engineering / Design
Reports To: Project Manager / Lead E&I Engineer

Job Summary

The Electrical & Instrumentation (E&I) Design Engineer is responsible for detailed engineering, design, and coordination of electrical and instrumentation systems for water supply, sewerage networks, pumping stations, Water Treatment Plants (WTP), and Sewage Treatment Plants (STP). The role includes preparation of design documents, drawings, BOQs, technical specifications, vendor coordination, and support during execution and commissioning.

Key Responsibilities

1. Electrical Design – General

• Prepare electrical load calculations and power distribution schemes
• Design HT/LT systems (11kV/33kV/415V as applicable)
• Transformer sizing and substation layout design
• Diesel Generator (DG) sizing and synchronization schemes
• Cable sizing calculations (power & control cables)
• Preparation of Single Line Diagrams (SLD)
• Earthing and lightning protection system design
• Illumination and small power layout
• Preparation of BOQ and technical specifications
• Vendor drawing review and approval

2. Pumping Stations (Raw Water / Clear Water / Sewage)

• Design of electrical systems for:
  • Vertical turbine pumps
  • Submersible pumps
  • Horizontal centrifugal pumps
• Motor selection and control philosophy (DOL, Star-Delta, Soft Starter, VFD)
• MCC & PCC panel design
• PLC-based control system design
• SCADA integration for remote monitoring
• Design of:
  • Level control systems (ultrasonic, pressure transmitters)
  • Flow measurement (magnetic flow meters)
  • Pressure monitoring systems
• Surge protection and interlocking schemes
• Design of standby power systems

3. Water Treatment Plant (WTP) – E&I Design Activities

• Power distribution design for:
  • Clarifiers
  • Flash mixers
  • Flocculators
  • Rapid sand filters
  • Sludge handling systems
• Instrumentation design for:
  • pH analyzers
  • Turbidity meters
  • Chlorine analyzers
  • Flow meters (Raw water, treated water, backwash lines)
  • Pressure transmitters
  • Level transmitters
• PLC & SCADA architecture development
• Control philosophy documentation
• Field instrument layout and cable routing
• Preparation of:
  • Instrument index
  • I/O list
  • Cable schedule
  • Loop diagrams
• Panel GA drawings and wiring diagrams

4. Sewage Treatment Plant (STP) – E&I Design Activities

• Electrical design for:
  • Aeration blowers
  • SBR/MBBR systems
  • RAS/WAS pumps
  • Sludge dewatering units
  • Decanters
• Hazardous area classification (where applicable)
• Gas detection systems (H₂S, methane)
• DO (Dissolved Oxygen) monitoring systems
• MLSS monitoring systems
• Motorized valves and actuator control
• Integration with centralized SCADA system
• Energy-efficient system design (VFD-based control)

5. Pipe Network & Distribution System

• Electrical & instrumentation design for:
  • Flow monitoring stations
  • Pressure monitoring stations
  • District Metering Areas (DMA)
• Remote Terminal Units (RTUs) design
• Telemetry system design
• Solar-powered instrumentation (where applicable)
• Cathodic protection coordination (if required)
• Control panel design for booster pumping stations

Documentation & Deliverables

• Single Line Diagram (SLD)
• Control Schematics
• Instrument Hook-up Drawings
• Cable Tray Layout
• Earthing Layout
• Lighting Layout
• BOQ & Cost Estimation
• Technical Specifications
• FAT & SAT Documentation
• As-built drawings

Coordination Responsibilities

• Coordinate with:
  • Civil team (for foundation & equipment layout)
  • Mechanical team (pump & equipment data)
  • Process team (treatment philosophy)
  • Client & consultants
• Attend technical meetings
• Site visits and commissioning support
• Vendor inspections & FAT participation

Desired Skills

• Strong knowledge of pumping systems
• Understanding of water & wastewater treatment processes
• Knowledge of energy-efficient systems
• Analytical & problem-solving skills
• Good communication & documentation skills

Performance Indicators (KPIs)

• Timely submission of design deliverables
• Accuracy in BOQ and load calculations
• Zero major design revisions
• Smooth commissioning support
• Compliance with project specifications