Electrical Engineer at Mohale’s Hoek Wind Farm

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July 6, 2026

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Hirundo Lesotho – Mohale’s Hoek Wind farm

Electrical Engineer Terms of Reference

Introduction

Hirundo is advancing the development of the 60 MW Mohale’s Hoek Wind Farm, a landmark renewable energy project in Lesotho that will play a critical role in strengthening sustainable energy infrastructure.

We are seeking an experienced Electrical Engineer, Electrical Engineering Consultancy Partner, or multidisciplinary team/company to support a key development priority: the planning, design, optimization, stakeholder alignment, and bankable costing of the project’s electrical infrastructure, including the grid connection to an existing substation and intra-farm electrical network.

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Project Management

Project Objective

Hirundo Aims To Define An Electrical Infrastructure Concept That

Secures alignment with all relevant stakeholders, including LEC, government authorities, regulators, and local communities where applicable.
Supports the reliable export of up to 60 MW of renewable electricity from the wind farm through the existing LEC transmission network and associated substation infrastructure.
Optimizes technical feasibility, system performance, and overall project electrical connection costs.
Complies with applicable grid code, utility, and electrical engineering requirements.
Minimizes technical, environmental, and operational risks in the project implementation and operational phases.
Includes detailed cost estimates suitable for project finance due diligence

Scope of Work

The Selected Consultant/engineer Will Contribute To

Grid Connection Concept Optimization & Design

This Assessment Shall Include, But Not Be Limited To

Review of available transmission network information, grid studies, and connection options.
Design, optimization and evaluation of alternative grid connection concepts, including:

Assessment of the advantages and disadvantages of locating the 33kV to 132kV transformers and project substation:

On the mountain ridge within or adjacent to the wind farm, or
Near, within or as an extension of the LEC Litsoeneng Substation.
Comparison of medium-voltage and high-voltage connection concepts between the wind farm and Litsoeneng Substation.
Transmission line and Point of Common Coupling (PCC) Connection

132 kV or 33kV (as applicable) transmission line design
PCC requirements, including protection concepts
Identification of required upgrades to the existing Litsoeneng Substation.
The project substation, including:

Substation configuration and arrangement.
Major equipment selection.
Protection and control philosophy.
Grounding and earthing systems.
Preliminary physical layout requirements.

Identification and recommendation of the technically and economically preferred grid connection concept.
For the preferred grid connection concept, prepare:

Single-line diagrams (SLDs)
Layout drawing
Preliminary equipment schedules
Detailed cost estimates suitable for project finance due diligence.

Design, optimization and evaluation of alternative wind farm medium-voltage collector system concepts, varying:

Cable type and Sizing
Cable routing and MV collector network configuration and topology considering:

Terrain constraints
Constructability / Civil works
Electrical losses
Environmental considerations
Project costs
Redundancies

Identification and recommendation of the technically and economically preferred Intra Park Electrical Network configuration.
For the preferred Intra-Park Electrical Network configuration, prepare:

Single-line diagrams (SLDs)
Layout drawing
Preliminary equipment schedules
Cost estimates suitable for project finance due diligence

Stakeholder Engagement and Project Integration

Participate in informational or technical meetings and workshops with:

Lesotho Electricity Company (LEC).
Government authorities.
Regulatory bodies.
Other project stakeholders.

Identify stakeholder requirements that may influence electrical design decisions and project implementation.
Coordinate with environmental, social, civil, geotechnical, and wind resource consultants engaged on the project.
Support discussions related to:

Grid connection requirements.
Utility interface requirements.
Grid code compliance.
Project permitting requirements.

[Optional] Grid integration study

Optionally Provide a Grid Integration Study, Including

Network capacity assessment.
Identification of connection constraints and operational risks.
Assessment of compliance with applicable grid code requirements.

Deliverables

The Consultant Shall Provide

Documentation of the optimization process and comparison of alternatives assessed under the Scope of Work, including the rationale for the recommended solution.
Details of the recommended Grid Connection Concept and Intra-Farm Electrical Network configuration:

Single-Line Diagrams
Layout Drawings
Preliminary equipment schedules
Cost estimates suitable for project finance due diligence

[Optional] Grid Integration Assessment Report.

Qualifications And Desired Expertise

Expertise may be provided by individual consultants, engineering consultancies, or multidisciplinary teams with demonstrated experience in power systems and renewable energy infrastructure.

The Candidate/team Should Possess

Bachelor’s or master’s degree in electrical engineering, Power Systems Engineering, or a related field.
For lead consultant/team lead: minimum of 5 years to 10 years of relevant professional
Demonstrated experience in:

Grid connection studies and transmission infrastructure.
Substation design.
Medium- and high-voltage electrical systems.
Power system modeling and electrical studies.

Strong understanding of feasibility studies, electrical system design, grid integration, and project costing.
Experience engaging utilities, government authorities, regulators, and other stakeholders, preferably in Lesotho
Familiarity with Southern African transmission networks and grid code requirements will be highly advantageous.
Valid registration of company/consultancy and compliance with applicable tax requirements in Lesotho.
Consultants, engineers, or stakeholders familiar with the Lesotho context will be considered an advantage.

Invitation

We use a two-phase selection process to keep the initial effort low for candidates and manageable for us as the evaluating party.

Phase 1 – Expression of Interest (all applicants)

To register/express your interest, please submit a brief expression of interest (maximum two pages) covering:

A short profile of your organization and relevant experience.
One or two comparable projects, highlighting relevance to grid connection, substations, transmission systems, or renewable energy infrastructure.
A brief indication of proposed approach and availability.

Phase 2 – Full Offer (short-listed candidates only)

Short-listed candidates will be invited to submit a complete offer covering:

Scope and methodology.
Required level of design: suitable for project finance due diligence
Detailed deliverables, schedule, and commercial terms.
Budget.

How to Submit

Phase 1 – Expression of Interest

Please send your expression of interest by email to Hirundo at ***email_hidden*** no later than 24 July 2026.

Use The Subject Line

“EoI – Mohale’s Hoek Wind Farm – Electrical Engineer”

Phase 2 – Full Offer

Short-listed candidates will receive a direct invitation with a full request for proposal, within 3 weeks after the Phase 1 closing date.

Site Visit

Post Phase 1, a Site Visit To The Proposed Project Area In Mohale’s Hoek Will Be Arranged As Part Of The Selection Process To Allow Interested Candidates To Familiarize Themselves With

The proposed wind turbine locations.
The project’s terrain and electrical infrastructure constraints.
Potential substation locations.
Potential grid connection corridors.
Existing transmission infrastructure and site access conditions.

Further details and coordination arrangements will be communicated to interested applicants.

Supporting Information

To support preliminary technical assessment and understanding of the project context, a KMZ file showing wind turbine locations can be found in the annex.

Apply here!

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