National Water Supply Engineer

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Overview of position

Background:

• The Aden fishery harbour, located in Yemen, serves as a critical infrastructure hub for the country’s fishing industry & coastal economy. Established in the late 1970s & operational by 1986, the harbour was initially equipped with comprehensive facilities for fish handling, processing & marketing. Covering an area of 96,612 square meters, the harbour played a pivotal role in connecting the eastern & western coastal governorates along Yemen’s coastline.
• However, years of conflict, neglect & inadequate maintenance have significantly degraded the harbour’s infrastructure. Core systems, including wastewater facilities, roads, electrical systems & sewage networks, are in critical disrepair. Operations have been severely hampered due to corroded sewage pipes, damaged pumping stations & outdated treatment facilities, posing risks to public health & the marine ecosystem.
• In response, our client in Yemen has launched an initiative to rehabilitate the harbour, contributing to improved food security, economic recovery & the empowerment of coastal communities. This project aligns with the United Nations Sustainable Development Cooperation (UN SDG) framework (2022 – 2024), emphasizing sustainable infrastructure development & environmental preservation.

The existing water supply system of Aden fishery harbour requires urgent attention:

• The site is connected to the public water supply system by a single 4 inch diameter pipeline, which is damaged in certain sections.
• The harbor has no water storage facilities.
• The network spans 1,800 meters, with pipe diameters ranging from 4 to 8 inches. The older sections, constructed from ductile materials, exhibit severe rust & corrosion.
• UPVC pipelines in surrounding areas are improperly installed, leaving them exposed & prone to damage, compromising the reliability of the system.
• Many inspection chambers, manholes & valves are damaged or destroyed, rendering the network inefficient & difficult to maintain.
• The firefighting system previously relied on high-pressure water supply from the main network. However, reduced water supply & pressure have rendered this system ineffective, necessitating the integration of a dual purpose water supply & firefighting network.

The rehabilitation project has included initial assessments, site inspections & preliminary designs to identify deficiencies in the water supply & firefighting systems. The following tasks were conducted:

• Critical infrastructure assessments: Examined the condition of pipes, valves, manholes & firefighting systems.
• Preliminary design recommendations: Proposed redesigns to meet the water demands of fish processing, vessel operations & domestic needs.

The focus now shifts to:

• Reviewing previous work & verifying initial designs.
• Finalizing detailed designs & implementation plans.
• Developing sustainable, efficient, environmentally compliant water supply & firefighting systems tailored to the harbours operational & environmental challenges.

The engagement of a Water Supply Engineer is critical to achieving these goals. The Engineer will provide expertise in validating existing designs, addressing infrastructure gaps & creating long term solutions that prioritize sustainability, resilience & operational efficiency.

Role objectives

The primary objectives of this assignment are to:

• Assess the existing water supply & firefighting infrastructure, needs, identifying deficiencies & risks.
• Verify previous designs & recommendations for compliance with international & local standards.
• Design a robust water supply & firefighting system tailored to the harbor’s needs, ensuring sustainability & resilience.
• Enhance the harbour’s infrastructure to meet future demands & withstand environmental challenges.

The consultant will perform the following tasks:

Task 1: Document review & verification & stakeholder consultations:

• Review existing reports, designs, assessments & analyse the findings from the detailed assessments & consultations related to the site inspection & analysis of water demand.
• Cross check from the needs assessment for design data like identify water supply sources & suitable types for the demands including fish processing & handling, ice production, vessel cleaning & dock maintenance & domestic waste from workers, staff & calculate peak flow & load capacities based on harbour activity levels.
• Conduct a comprehensive review of the assessment & design of the water supply network & review the proposal for the design if appropriate based on topographic, geotechnical & hydrological data.
• Verify the feasibility & compliance of proposed solutions for water supply network design.
• Evaluate the feasibility of proposed rehabilitation options, ensuring alignment with project objectives & compliance with all relevant international standards. Additionally, identify the optimal option that meets the outlined criteria, including available resources, cost benefit analysis, budget limitations, economic viability, investment costs & any other required criteria.
• Consider the pros & cons from the designer’s perspective to ensure a comprehensive evaluation that adheres to global best practices.
• Provide a comprehensive report summarizing validated findings, identified gaps & recommendations for further investigation, if needed.
• Engage with key stakeholders, including our client, harbour authorities, Local Water & Sanitation Corporation (LWSC) & relevant, to gather feedback on the findings & recommendations of the detailed assessments & consultations.
• Conduct virtual or in person consultations as necessary to align on project priorities & address potential technical or operational concerns.
• Conduct regular coordination meetings with the project team, our client & harbour authorities to review progress, resolve any design issues & ensure alignment with the project’s objectives.
• Coordination with Engineers who are working on the site on shared tasks is crucial to avoid conflicts, ensure efficient resource use & maintain progress through regular communication & clear responsibilities.

Task 2: Development of design:

Prepare the final design brief & conceptional design:

In this part, the consultant is expected to develop & confirm a mature concept for the required design works including determining the scope of work. This should be supported with detailed environmental assessments, design sketches, project plan & other required elements. The consultant will prepare the design concept(s) to obtain the best option that meet the following criteria:

• Review & refine the scope of work based on findings & recommendations.
• Functional, operation & aesthetic requirements to meet the stakeholder inputs.
• Available resources.
• Topographical, hydrological & meteorological constraints.
• Site, resource, social & environmental constraints.
• Safeguarding considerations.
• Cost benefit analysis & budget limitations.
• Risk assessment & mitigation strategies.
• Sustainability.
• Pros & cons, economic viability, investment costs criteria & any other required criteria from the designer perspective.

In this phase, the consultant shall prepare the concept design, concept layouts, a brief regarding required structural, coordination, systems, assessment of the site seismicity for the project, etc. Also, to deliver a concept design for the remaining other facilities as applicable. It is also required to review & determine the design codes that will be adopted, after making sure that they are applicable in Yemen. The consultant should also coordinate closely with the Project Coordinator & the Project Engineer in regard to the expected cost of the proposed solutions & keep track with the available project budget. Specify construction materials that are going to be used, identify, assess the nearest & most suitable resources. Consider the use of innovative materials or construction techniques to enhance the project’s sustainability:

• Proposals for durability enhancements & adherence to safety standards.
• Design of new structural components & the remedial measures for structure prepare retrofitting & detail drawings.
• Perform operational & maintenance plan by establishing a maintenance schedule, train harbour staff on operations, upkeep & ensure accessible components like manholes & pumping stations for inspections & repairs.
• Implementation planning by create detailed plans with construction schedules, resource requirements, risk mitigation strategies & stakeholder engagement for approvals & feedback.
• Design reports with all related calculations notes (structural, hydraulic & mechanical, etc.) for all the work, use internationally recognized design software based on established standards & when performing manual calculations, maintain neat & accurate records. The design record must be available for reviews & checks at any time & must be handed over to our client if requested at any time before the end of the assignment. The report should also include an executive summary.
• All the documents should be submitted in Microsoft (Excel, PDF, Word, DWG, Revit) & the source of the designed program.
• Final report for the design brief & conceptional design.

In case where multiple design options are prepared, they should be evaluated across the above mentioned criteria to select the best option for design concept. Include the for the selected option, covering but not limited to:

Design of water sources:

Connection to Public Supply:

• Assess the current 4 inch water connection for capacity & reliability.
• Recommend upgrades for better flow / pressure & propose flow meters / backflow preventers for monitoring & protection.

Borewells or raw seawater:

• Evaluate using borewells or raw seawater for non potable needs (dock washing, vessel cleaning & landscaping).

Water storage design:

Storage tanks:

• Calculate tank capacity for daily demands (fish processing, vessel cleaning, domestic use) & firefighting reserve (compliant with NFPA 20 for 2 – 3 hours of flow).
• Design separate tanks for potable (WHO standards) & non potable water if feasible.
• Suggest elevated tanks (gravity fed) or ground level tanks with booster pumps.
• Recommend corrosion resistant materials (e.g., reinforced concrete, fiberglass, HDPE).

Pipeline network design:

• For hydraulic analysis modelling tools (e.g., EPANET, Water CAD) to optimize pipeline diameters, flows, pressures & calculate friction losses.
• Size pipes for peak & future demand, replacing corroded pipes with HDPE or UPVC for coastal durability.
• Divide harbour into zones for efficient distribution & create detailed layouts with redundancy for maintenance.

Firefighting system design:

Firewater reserve & hydrants:

• Design dedicated firefighting reserves (NFPA 20 standards) with rapid refill capability.
• Locate hydrants.
• Specify high capacity pumps with backup power systems.
• Dual purpose system, integrate potable & firefighting pipelines with proper separation.

Sustainability features:

Energy optimization:

• Pumping system design, including flow & head requirements.
• Renewable energy by design solar powered pumps.

Instrumentation & control:

• Include automated control systems (SCADA) for real time monitoring of water levels, flow rates & pump operations.
• Install flow meters & pressure sensors to detect leaks promptly.

Structural design:

• Load & stress analysis for tanks, manholes & all structural components.
• Reinforcement & material specifications to ensure durability & compliance with standards.

Environmental Impact Assessment (EIA), focusing on:

• Quality calculations to meet local & international environmental standards.
• Sustainable water use practices.

The design should be according to the water supply system design standards:

International standards:

• WHO: Drinking water quality guidelines.
• FAO: Fishery infrastructure requirements.
• NFPA 14 & 20: Fire hydrants, water reserve & pump standards.
• ISO 5667: Water sampling & testing.

AWWA standards:

• C900: PVC pressure pipe design.
• M31: Water distribution system design.

International Plumbing Code (IPC):

• Potable water & sanitation standards.

Local regulations:

• Compliance with Yemeni standards for water management & environmental protection

Task 3: Tender document preparation:

Prepare comprehensive technical tender documents, including:

• Clearly define the scope of work, including technical & operational requirements for each component of the project.
• Develop updated & itemized Bills of Quantities (BOQs) with precise cost breakdowns based on local market rates & international best practices.
• Provide detailed technical specifications for materials, equipment, compliance sheet & construction methods to ensure compliance with industry standards.
• Include detailed design drawings & layouts (PDF, DWG, Revit), showcasing, water source connections, storage tank placement, pipeline layouts & flow distribution, firefighting infrastructure (hydrants, pumps & tanks), water treatment units if needed, utility coordination plans & environmental management layouts, etc.
• Incorporate environmental & safety management plans, outlining measures to mitigate construction impacts, safeguard workers & protect surrounding ecosystems.
• Draft detailed implementation methodologies, timelines & quality assurance protocols for contractor adherence.
• All drawings shall be prepared to ISO standards. They shall include all layouts, sections, details, dimensions, etc. Drawings shall be presented in standard scales, with a minimum scale of 1:100 for engineering plans, & a more detailed scale for the detailed drawings. Drawings shall include title blocks featuring the name & logo of the donor, beneficiary & our client. They shall also include drawing numbers, revision numbers, revision dates, legends, scale & the necessary technical content. A complete set of drawings shall consist of, but is not limited to, the following main components namely cover sheet, index sheet, general notes & legend, engineering drawings & book of details.

Task 4: Design support during tendering & construction:

The design support during tendering & construction ensures a successful transition from design to execution by providing critical technical assistance at two key stages namely tendering & construction. Key tasks in this phase include:

Tendering process support:

• Respond to technical queries from bidders as requested by our client, ensuring clarity of the project’s technical requirements & promoting adherence to design specifications.
• Provide clarification on design intent, offer additional information & address any ambiguities in the tender documents to facilitate a fair & competitive bidding process.

Construction phase support:

• Offer ongoing technical support during construction, including responding to inquiries from the construction team & overseeing necessary design modifications due to unforeseen site conditions.
• Ensure that any design changes are effectively integrated without compromising the project’s quality or objectives, maintaining the integrity of the original design throughout the construction period.

Each deliverable will be subject to review and approval by our client & relevant stakeholders. The consultant must ensure that the quality of all deliverables aligns with international best practices & our clients standards. Any revisions or additional information requested during the review process must be incorporated within agreed timelines.

Deliverable 1: Document verification report & stakeholder consultations

Description: Review & report for findings of detailed assessments & proposed methodology for next step preparation after stakeholder consultations

Timeline: Within 2 weeks after Notice to Proceed (NTP)

Payment: 25%

Submission requirement / approving authority: Upon submission & approval of the deliverable report covering the required outputs. Our client, in consultation with stakeholders, will review & send in case of any enquiry within one week

Deliverable 2: Draft technical documents

Description: Design brief & conceptional design including all structural hydraulic calculations & detail drawings

Timeline: Within 5 weeks of the start of the consultancy

Payment: 40%

Submission requirement / approving authority: Design brief & conceptional design should be approved before moving to the detail design. Upon submission & approval of the deliverable report covering the required outputs. Our client, in consultation with stakeholders, will review & send in case of any enquiry within two weeks.

Deliverable 3: Final technical documents

Description: BOQs & specifications, scope of work, detailed drawings, compliance sheet, cost estimates, designed report, implementation methodologies, timelines, workflow & environmental plans. Finalized documents incorporating feedback from stakeholders & the client

Timeline: Within 7 weeks of the start of the consultancy

Payment: 25%

Submission requirement / approving authority: Upon submission & approval of the deliverable report covering the required outputs. Our client will review & send in case of any enquiry within two weeks

Deliverable 4: Design support during tendering & construction

Description: Design support during tendering & construction ensures the successful transition from design to execution

Timeline: Twelve months after the tendering process for the construction work

Payment: 10%

Submission requirement / approving authority: The retained amount will be released upon the issuance of the substantial completion certificate. However, in case the project is cancelled or any unforeseen circumstances arise that prevent the implementation of the project, the full retained amount should be released

The consultant is expected to adopt a participatory and iterative approach, involving:

• Prepare a methodology for his understanding the task outline in TOR.
• The consultant will thoroughly review existing assessments, topographic survey, reports, drawings & technical documentation to establish a comprehensive understanding of the sewerage & sanitation condition & the prior work undertaken.
• The approach will emphasize meaningful interactions with stakeholders to ensure alignment, address concerns & integrate their inputs into the rehabilitation framework. Regular consultations with relevant authorities, our clients representatives & technical experts will be conducted.
• Field visits, will be undertaken to validate the findings of previous assessments, observe the current structural conditions & gather any additional data needed for accurate analysis.
• Utilizing state of the art tools & software, the consultant will perform detailed structural analyses to assess load distribution, potential failure points & structural resilience under various scenarios. Non linear & dynamic analyses will be used where necessary.
• The methodology will integrate international best practices in marine infrastructure rehabilitation, including sustainable & environmentally friendly techniques, ensuring compliance with applicable standards & codes.
• Draft designs, specifications & tender documents will undergo iterative review processes to incorporate feedback from stakeholders & technical reviewers, ensuring the final deliverables are robust & actionable.
• The consultant will identify potential risks, such as construction challenges, environmental impacts, stakeholder concerns & propose mitigation strategies to address these risks proactively.
• A robust quality assurance framework will be implemented to verify the accuracy & integrity of all deliverables, ensuring alignment with the project objectives & our clients expectations.

Project reporting

The National Engineering Consultant will work under the direct supervision of the Project Coordinator & the Project Engineer in close coordination with the engineering unit. The consultant will provide regular updates to our clients Yemen team on progress, key findings & strategic recommendations throughout the consultancy period. Additionally, the governance structure will include:

• Regular progress reviews: The consultant will participate in bi weekly progress review meetings with the Project Manager & stakeholders to report on milestones, discuss challenges & ensure timely resolution of issues.
• Documentation & reporting: The consultant must maintain detailed records of all activities, including meeting minutes, field observations & technical analyses. These records will be submitted as part of the project documentation & will be subject to review by our client.
• Compliance with standards: All deliverables must adhere to our client’s policies on environmental & social safeguards, financial transparency & ethical standards. The consultant is accountable for ensuring that all project activities comply with these policies.

Accountability will be ensured through a transparent reporting mechanism, where progress updates are shared with all stakeholders & deliverables are reviewed & approved based on predefined criteria.

Key competencies

Academic background:

• A minimum of a bachelor’s degree in mechanical engineering, civil engineering, water resources engineering, hydraulic engineering or a related field, an advanced degree (master’s or Ph.D.) in a relevant discipline is preferred.

Experience:

• Minimum 7 years of relevant experience in water supply & firefighting system design.
• Demonstrated experience in hydrological & hydraulic modeling using advanced computational tools.
• Previous experience in port or landscaping infrastructure projects (related to the water & firefighting systems), including design & implementation phases.
• Proven track record of working on environmentally compliant projects aligned with international standards.
• Strong analytical & problem solving skills with the ability to address complex technical challenges effectively.
• Performed at least 2 projects as a consultant related to ports’ or landscaping scaled projects rehabilitation, reconstruction related to the water & firefighting systems.
• Proven track record in preparing tender documents & BOQs.
• Experience in development of compressive Scope of Works, BOQ’s, drawings & designs.

Technical expertise:

• Proficiency in using design software such as AutoCAD, EPANET, WaterGEMS, WaterCAD or similar tools for drafting, modelling & analysis.
• Familiarity with local & international codes and standards for water supply design.

Language skills:

• Fluency in English (written & spoken) is required.
• Knowledge of Arabic is an asset.

Core competencies required for this role:

• Ability to work in Yemen governorates specifically in Aden.
• Demonstrates integrity by modelling the UN’s values & ethical standards.

Functional competencies required for this role:

• Strong knowledge & experience in building capacities in reporting, particularly in the context of technical & engineering projects.
• High level of professionalism & the ability to work independently, often in high pressure situations & under tight deadlines.
• Excellent interpersonal communication skills, including the ability to facilitate training sessions, workshops & presentations for diverse audiences.
• Demonstrated ability to engage with stakeholders at multiple levels (government, contractors & our client teams) & maintain collaborative relationships.
• Proven expertise in technical report writing, including strategic recommendations & detailed engineering assessments.

Team management

• This role has no team management responsibility.

Further information

Facilities to be provided by the client:

• Our client will provide support letters to facilitate access to the site visits. In addition our client will provide feedback on any inquiry regarding any specific requirements.
• Our client will appoint a focal point for the assignment. All requests for information, guidance & assistance should be addressed & provided to the focal point. This includes liaison with other units & national departments as well as access to any relevant data that is not classified as restricted.
• Other personnel from the organization to be assigned to the project shall be as agreed during the pre contract meeting.

Contract duration:

• The contract will be for a total of 25 working days spread over a 1.5 month period. Specific working days will be allocated based on project requirements, deliverable deadlines & coordination with our client. Additionally, 10% of the contract amount will be retained for one year to support during tendering & construction.

Duty station:

The consultant will be based in Aden, Yemen with regular participation in meetings with our client, stakeholders, will be necessary.

Scope of price & payment:

• Payment shall be provided upon satisfactory completion of the deliverables outlined in the table above. Payment requests submitted by the consultant & must be certified by the supervisor(s).
• Payments are to be made within 30 days from receipt of invoice.
• A certification of payment needs to be signed & approved by the direct supervisor.

Other information:

• Qualified female candidates are encouraged to apply for this role.

How to apply

https://app.tayohr.io/jobs/detail/vac-23465-national-water-supply-engineer-22184