Omesh Pathirathna

Role: Engaged to lead mechanical design compliance for pumping stations, distribution networks, and
transmission pipeline systems. Oversaw MAS, MIR, IR approvals, equipment sizing, and end-to-end technical
validation in alignment with NAMA and project specifications.
• Directed mechanical engineering reviews for the Wilayat Manah Water Distribution Networks (OMR
24M), ensuring strict compliance across MAS, MIR, IR, and all contractor submissions.
• Evaluated pumping-station and pipeline design adequacy, strengthening technical readiness for construction
and system commissioning.
• Collaborated closely with clients, consultants, and contractors to resolve design issues, standardize
documentation, and accelerate approval cycles.

Major JV executing national water transmission and pumping-station programs.
Role: Tasked with leading design reviews, contractor-submission evaluations, and mechanical documentation
control for large-scale transmission and pumping infrastructure.
• Led mechanical review and coordination for the Al Sharqiya Water Transmission Project, ensuring strict
compliance with specifications and design requirements.
• Evaluated BOQs, material submittals, and technical documents for accuracy and alignment with engineering
intent.
• Conducted client coordination, technical clarifications, and correspondence to secure timely approvals and
maintain delivery schedules.
• Oversaw mechanical reviews for the Al Sharqiya Water Transmission System (OMR 110M + OMR 10M PS),
validating designs for pumping stations, pipelines, and major mechanical assets.
• Led testing and commissioning activities for pumping stations, supervising pump testing (SAT), preparing
routine maintenance schedules, and addressing troubleshooting works.
• Supported documentation control, commissioning readiness, and multidisciplinary integration for smooth
project execution.

Role: Led estimation, budgeting, value engineering, and cost tracking for stormwater pumping-station and pipeline
developments.
• Directed mechanical and cost governance for the Ambathale Storm Water Project (USD 5.8M + LKR
1.18B).
• Prepared construction work schedules, material take-offs, and technical documentation for planning and cost
forecasting.
• Managed subcontractors and suppliers to ensure timely delivery, correct mechanical specifications, and
compliance with QA/QC requirements.
• Supervised mechanical installation of pipelines, pumping equipment, and associated fittings as per approved
shop drawings and method statements.
• Performed design reviews, tender evaluations, budget preparation, and value-engineering assessments.
• Optimized resource planning and reinforced project cost control across mechanical scopes.

Role: Managed design evaluation, estimation, tender clarifications, equipment selection, and consultant
coordination for treatment and transmission systems.
• Oversaw mechanical engineering for high-value national projects including:
◦ Kelani Right Bank Water Treatment Plant (EUR 43.6M)
◦ Kalu Ganga WTP Extension (JPY 331M + LKR 2B)
• Conducted material take-offs, cost calculations, and technical clarifications to ensure smooth design-to
commissioning transition.
• Coordinated extensively with consultants to secure approvals and align design intent with execution
requirements.
• Led commissioning activities for treatment plants, ensuring mechanical equipment, pipelines, and process
systems met performance standards.
• Prepared routine and preventive maintenance schedules for mechanical systems.
• Managed troubleshooting during commissioning and initial operations to stabilize system performance.

• Supported mechanical design documentation, P&ID-based material listing, installation planning, and technical
submissions for large water-supply projects.
• Prepared P&ID-driven material lists, method statements, and installation documentation for:
◦ Batticaloa Project (USD 16.1M + LKR 2.4B)
◦ Hambantota Project (USD 10.5M + LKR 615M)
• Coordinated approvals, handled site clarifications, and engaged with consultants to ensure smooth mechanical
installation and project execution.