Chathura Siriwardhana Email & Phone Number

Muscat, Oman

- Designed, reviewed, and estimated HVAC, firefighting and plumbing systems, including fire pumps, piping systems (sprinklers, hydrants, hose reels, landing valves), fire suppression systems, hot and cold water systems, wastewater drainage, sewage treatment plants (STPs), LPG systems, and compressed air systems. Ensured compliance with specifications, standards, and both international and local codes for buildings and infrastructure projects.- Conducted detailed analysis of technical schematics and project specifications, ensuring compliance with codes and standards.- Prepared budget proposals, advised stakeholders throughout project stages, and proposed value engineering options to optimize project timelines, quality, and cost-effectiveness.- Managed post-tender clarifications, procurement sheets, and generated reports for management meetings.- Actively participated in technical, project progress, and financial meetings to drive project objectives.- Performed take-offs using PlanSwift software, created Bills of Quantities (BOQs), and analyzed data to prepare commercial comparisons for competitive bids.- Ensured strict adherence to health, safety, and environmental regulations, along with maintaining documentation control and quality assurance practices.- Supervised site installations, testing, and commissioning of mechanical systems, ensuring alignment with drawings, standards, and regulatory requirements.- Developed installation schedules and coordinated labor, subcontractors, machinery, and material procurement to meet project deadlines.- Negotiated with suppliers and subcontractors, maintaining effective communication with clients and consultants to resolve technical inquiries.

Muscat, Oman

- Reviewed, designed and estimated mechanical, plumbing, and firefighting systems, including pumps, piping, water distribution, wastewater drainage, wet & dry fire protection systems, LPG systems, and more.- Performed take-offs and created Bills of Quantities using Standard Method of Measurements with PlanSwift software.- Developed detailed estimates including productivity factors and pricing using Candy construction software.- Analyzed data, evaluated quotations, and prepared commercial comparisons for competitive bids.- Conducted professional negotiations with subcontractors and suppliers.- Attended pre- and post-tender meetings, ensuring adherence to tender procedures.- Performed detailed analysis of technical schematics and ensured compliance with project specifications, codes, and standards.- Developed design-stage estimates, conducted rate build-up analysis, prepared tenders, and managed financial allocations for MEP systems.- Prepared material approval sheets and method statements, ensuring cost-effective and technically sound equipment and material selection.- Supervised site installations, testing, and commissioning of mechanical systems, ensuring compliance with drawings, standards, and regulatory requirements.- Developed installation schedules, coordinated labor, subcontractors, machinery, and material procurement to align with project timelines.- Conducted professional negotiations with suppliers and subcontractors, and maintained effective communication with clients and consultants to address technical inquiries.- Ensured adherence to health, safety, and environmental regulations, along with company documentation control and quality assurance practices.

Colombo District, Western Province, Sri Lanka

Defense Headquarters Project, Akuregoda, Battaramulla, Sri Lanka - Perfomed cooling load calculations (using Hourly Analysis Program (HAP)), pressure loss calculation for ducts, pipes - Designed MVAC system components: Air distribution, chilled water, condenser water, cooling towers, make-up water systems. - Designed Smoke and Heat Exhaust Ventilation System (SHEVS) and staircase pressurization system. - Developed and obtained approvals for shop drawings of air distribution systems, piping, plant rooms, etc. - Prepared Material Approval Requests (MARs), technical submissions, and obtained consultant approvals. - Supervised site works, conducted tests for pipes and ducts, securing consultant approvals.Anantara Banquet Hall Project, Kalutara, Sri Lanka - Designed drawings for air distribution, chilled water circulation, ventilation systems. - Planned installation to meet milestones, obtained material approvals, managed procurement. - Led on-site construction, managing labor, materials, subcontractors, interdisciplinary collaboration. - Facilitated project communication through stakeholder meetings. - Oversaw HVAC system completion: testing, balancing, commissioning, handover documentation. - Managed project finances, ensuring invoicing, payments, budget adherence.National Book Publishers Building, Battaramulla, Sri Lanka and Accident & Emergency Treatment Unit, General Hospital, Kalutara - Reviewed HVAC drawings for accuracy, compliance. - Developed, obtained consultant approval for shop drawings. - Prepared MARs, procurement orders, secured consultant approvals. - Ordered equipment, materials, customized units with manufacturers based on site measurements. - Managed subcontractors, materials, ensured project milestones. - Collaborated with stakeholders: consultants, civil contractors, subcontractors, project success facilitation.

Defence Head Quarters Complex (Dhqc) Project, Akuregoda, Sri Lanka

- Served as a consultant for the Defense Headquarters Complex in Akuregoda, Sri Lanka.- Performed cooling load, static head and all related calculations for HVAC system designs (ducts, fans, pumps, pipes, AHUs, sound attenuators, VAV boxes, electrical cables, chillers, and cooling towers,.) using Hourly Analysis Program (HAP), AutoCAD, and Revit MEP ensuring compliance with codes, and standards.- Designed smoke control systems, including staircase pressurization and smoke extraction systems, with duct, air terminals, and fan sizing according to codes and standards.- Developed construction documentation, including builder's work, detailed design, and coordination drawings.- Collaborated with engineers, architects, contractors, and clients.- Prepared comprehensive documents such as drawings, specifications, equipment schedules, and BOQs.- Supervised on-site installations to ensure adherence to approved designs and specifications, and fulfilled testing and commissioning requirements.- Reviewed and approved contractors' shop drawings, materials, and purchase orders during construction.- Responded to RFIs and issued site instructions.

Colombo, Western Province, Sri Lanka

- Conducted thorough calculations and simulations to design natural and mechanical ventilation systems, daylighting solutions, and evaporative cooling systems for industrial, commercial, and residential buildings.- Inspected and assessed existing ventilation and daylighting systems, implementing improvements to enhance their performance.- Coordinated with clients and consultants to present designs and commercial proposals, facilitating negotiations.- Created detailed design drawings, shop drawings, fabrication drawings, and bills of quantities (BOQs).- Worked collaboratively with sales, design, fabrication, client, and installation teams to ensure successful project outcomes.- completed projects by testing, commissioning, and delivering them to clients, while also managing DLP-related tasks.- Prepared and managed material purchase documents for procurement.

Sri Lanka

- Assisted in developing and implementing maintenance procedures, including preventive, corrective, predictive, and condition-based maintenance.- Assisted in preparing rosters for the maintenance team, allocating technicians based on their expertise (boiler, HVAC, swimming pool, gardening, kitchen & laundry equipment, water treatment, STP, generator, electrical, building structure & other architectural features and lanscape).- Supported the allocation of materials, tools, and technicians to address client complaints, enhancing guest satisfaction.- Contributed to daily briefings, ensuring the smooth and efficient operation of building services.- Monitored critical hotel systems, ensuring their optimal performance and reliability.- Oversaw repair works by external contractors, including witnessing tasks (ex: replacement of 2 nos of compressors in Ramada Hotel).- Assisted in managing maintenance contracts for various systems and equipment, including boiler systems, gasifiers, fire extinguishers, and fire detection systems.- Prepared documentation for ISO 14001 and ISO 9001 compliance.

Master Of Engineering In Energy Technology - M.Eng

Honours Degree Of Bachelor Of The Science Of Engineering - B.Sc (Hons), Mechanical Engineering