كونستانتينوس Tsirekas

Client: Dubai Municipality
Project: Deep Tunnel Stormwater System Terminal Pumping Station and Sea Outfall - Planned completion in December 2020.
• Terminal Pumping Station
Construction of a two shaft Concrete Structure to max. depth of 59 meters.
Supply, Installation and commissioning of pumping system of total capacity of 36m3/sec of storm water.
Supply, Installation and commissioning of HVAC, Power Supply, Control, Fire detection and Fire Fighting Systems.
• Overflow Structure
Construction of Overflow Channel structure, to convey from the Terminal Pumping Station, to the sea 110m3/sec of storm water.
• Sea Outfall Pipelines
Supply, Installation and Commissioning of approx. of 3x500m of 2000mm dia. buried HDPE outfall pipelines.
Supply, Installation and Commissioning of diffusers system.
• Buildings
Construction of Reinforced Concrete Electrical, Chiller Plant, Firefighting, Accommodation buildings.
• External Works
Boundary wall and gates.
Road and paving works.
Utilities Networks.

Achievements:
• Completed primary preparations of Project Controls and Risk Management plans within agreed timeframes.
• Establish and maintain positive relationships with Employer and Engineer.
• Created a progress invoicing procedure that generated positive cash flow.
• Effectively managed changes that are created from value engineering proposals

Client: ADCO (Main Contractor: Maire Technimont
Selected for a project to strengthen the team, rectify the deficiencies of Project Controls and to utilize specialized skills.
Project: Civil, Mechanical, Electrical & Instrumentation Works for off-shore clusters for Al Dabbiya Surface Facilities.
• Delivered civil works for offshore clusters with the construction of the foundation for steel structures and equipment, trenches, utility holes, pits, paving, and roads.
• Mechanical and Piping Works for offshore clusters, including erection/marine transportation of prefabricated rack modules, piping prefabrication/erection of 240, 000 DI, steel structure erection, valves, and equipment erection. Pre-commissioning of Mechanical and Piping Works
• Electrical and Instrumentation Works for offshore clusters, including the installation of 2, 100 KM of electrical and instrumentation cables, installation of Transformers, Electrical and Instrumentation Technical Rooms, calibration and installation of instruments. Pre-commissioning of Electrical and Instrumentation Works.

Achievements:
• Prepared and collected contemporary records to support the preparation of the cost and time claims which led to successful negotiations with the client.
• Reviewed and rectified control functions including planning, progress measurement, certification and invoicing.
• Coordinated procurement efforts and achieved a major reduction in cost based on the combination of the scope of supply of materials, negotiation of long-term agreements, and optimization of material selection.
• Prepared the profitable negotiation of variation orders.
• Strategically improved the invoicing process and optimization of cash flow.

Client : ADGAS
Project: Integrated Gas Development Expansion Package 1
• Special marine studies involving 2D/3D physical modeling.
• Construction of 2, 000lm of revetment and pre-casting/installation of 3, 600 Nos. of Core-Locs units for revetment protection.
• Dredge 2.25M m3 of material from borrow area for reclamation of 240, 000 m2 of land.
• Soil improvement of reclaimed land by using Vibro-Compaction and Rapid Impact Compaction.
• Shoreline clearance, such as removal and disposal of debris, construction waste, and concrete tetrapod from existing coastline and the footprint of land reclamation area.
• Pre-casting and installation of Quay Wall Concrete blocks on rock layer foundation to construct a 62lm corner Quay Wall (approx. 4, 600m3).
• Construction of 143 long concrete retaining wall 3.25 to 6.25 m high (approx. 2, 500m3 concrete) resting on 72 piles.
• Built Drainage outfalls through Core-Locs concrete armor units, extended ADMA API Separator outfall, and protected effluent outfall pipelines and submarine cables.

Achievements:
• Delivered all project’s requirements including preparation of Project Controls, Risk Management plans, and procedures within agreed timeframes.
• Achieved primary cash flow for the project.
• Successfully led the process for major subcontracts awards and managed subcontractors to ensure no budget overruns and successfully defended subcontractor claims.
• Established and controlled Risk Management procedures and efforts internally.
• Accurately identified and monitored Project Risks and participated in management and mitigation efforts.
• Accurately forecasted budget costs and achieved all internal KPIs throughout the Project.
• Pivotal in supporting the project and being awarded the best performing project of the group for 2017.

Client: Qatar Petroleum (QP)
Project: Engineering, Procurement, Installation & Commissioning for Berths & Port Infrastructure for Ras Laffan Port Expansion Project (Phase 2).
• Integration of F&G system of Radar Shelter and laying of additional Fiber Optic Cable for complete the port facility.
• Completed and steered the operational handover of common facilities for LPB 30/LPB 31 and free residual chlorine analyzer package system.
• Replacement of the ship to shore link for LPB 30.

Achievements:
• Facilitated the successful management of changes imposed by the client and the corresponding Subcontractor claims.

Client : Ministry of Transportation and Communication (MoTC) Sultanate of Oman
Project: Development of General Cargo & Liquid Terminal, Port of Salalah
• Expansion of a cargo and liquid terminal, involving construction of harbor basin dredging and 1.266m quay wall in concrete block work with berthing, mooring and navigation aids, reclamation and soil improvement of 100, 000 m2 of land, construction of rock revetments and construction of crane supporting structure supported on strip footing for multipurpose berths facilities for dry-bulk commodities/new liquid jetties.
• Construction of Pipe Racks for Liquid Products piping, Roads and pavement and buildings, including substations, fire water pump house, ablution, prayer, and cafeteria block.
• Design, installation, and commissioning of fire detection/protection and firefighting systems for liquid jetties.
• Delivered utility services, transportable water supply system, area drainage, and sewerage system.
• Construction and Commissioning of Electrical services, electrical supply and distribution system, and area illumination.

Achievements:
• Successfully managed key supply and subcontract agreements.
• Selected to replace the Project Planner for six months and lead the preparation and negotiation of successful EOT requests.
• Prepared and closed major variations in collaboration with the client.
• Minimized costs with cost-effective detailed shop drawings.
• Prepared and collected records to support the preparation of the cost and time claims.

Estimation of direct costs, estimation of indirect costs, estimation of risks and opportunities, tenders closeouts and prices negotiations with vendors, subcontractors and clients.
Cost analysis of previous projects, defining indirect costs of previous projects and achieved fabrication and erection productivities and costs.

IKEA Sofia Steel Structure construction and erection sub-contract at Sofia, Bulgaria
Fabrication and erection of 2, 700 tons of truss-framed two storey steel structure.
Coordination with fabrication managers and scheduling fabrication works, detailed scheduling of all erection works, scheduling and coordination of transportation, allocation of fabrication and erection resources, supervising fabrication and erection works, invoicing, handing over.

Thessaloniki Refinery upgrade project CCR unit elevator structural strengthening and fireproof cladding at Thessaloniki, Greece
Main Responsibilities: Preparation of detailed schedule, resources allocation, supervision of works, cost control, contract management, handling of correspondence, handing over.

Thessaloniki Refinery Upgrade Project at Thessaloniki, Greece
Construction of Mid Voltage Substations J and K at Hellenic Petroleum Thessaloniki Refinery
Civil works for substations, lighting, grounding, lightning, HVAC, Fire Detection and extinguishing system.
Main Responsibilities: Preparation of detailed schedule, resources allocation, Sub-contractors and materials procurement, sub-contractors management, supervision of civil works, coordination of E/M disciplines works with civil works, invoicing, contract management, preparation and negotiation of variations, testing, commissioning and handing over.

Thessaloniki Refinery Upgrade Project at Thessaloniki, Greece
Construction of Mid Voltage Substations J and K at Hellenic Petroleum Thessaloniki Refinery
Civil works for substations, lighting, grounding, lightning, HVAC, Fire Detection and extinguishing system
Main Responsibilities: Supervising, monitoring, scheduling of all Civil works, preparation of civil shop drawings, detail engineering, managing of Subcontractors, and procurement of all civil materials.

Monthly production of 800 tons of fabricated steel for various Projects in Greece and the Balkans.
Main Responsibilities: Supervising of fabrication of steel-framed buildings and general steel structures, in accordance with EN ISO 9001:2008, implementation of fabrication schedule, allocation of resources to fabrication, protective painting, transportation activities, materials procurement, cost monitoring, Quantity surveying and cost estimation for tendering.

Construction of Military officers guest houses A and B in military command school in Thessaloniki, Greece
Construction of two two-floor buildings with 24 guest houses per floor, recreation rooms, storage facilities in basements, engine rooms, Electrical rooms, Power Supply, Water Supply, Drainage.
Main Responsibilities: Supervision and consulting of all structural Works, finishing works, water supply and drainage. Contract Monitoring, Cost Monitoring, Schedule Monitoring, Invoicing, Testing, Commissioning, Handing Over to End User.