EXPRESSION OF INTEREST FOR PROVISION OF PROJECT MANAGEMENT WORKS FOR THE CURRENT DEFINITIVE FEASIBILITY STUDY 

Trinity Metals -Nyakabingo Mine, is seeking for a qualified and local Rwandan service provider to provide project management works for the current Definitive Feasibility Study of Nyakabingo processing plant that is currently being done by Obside Consulting, a South African engineering company who are experienced mineral processing plant designs and construction.

Scope of Work for Owner’s Team (Project Management): 

DFS Delivery Framework & Control

Establish and enforce a structured DFS execution framework aligned to Obsideo’s staged methodology, including:

Definition of stage gates, aligned with: Flowsheet maturity 

• Testwork completion 
• Design freeze points 

Implementation of: Change control system 

• Design development tracking 
• Assumption register 

Development of a fully integrated DFS execution plan,

• Logical progression from testwork → design → costing 
• No premature advancement of engineering without sufficient data maturity 

Metallurgical Testwork Integration (Critical Workstream)

• Oversee the entire metallurgical testwork program, including: Sample selection strategy 
• Test program sequencing 
• Laboratory coordination 

• Ensure: Testwork is representative of ore variability 
• Results are statistically and technically robust 

• Enforce direct linkage between testwork outputs and flowsheet evolution 
• Prevent: Design assumptions not supported by test data 
• Misinterpretation or over-extrapolation of results 

• Validate recovery assumptions, reagent regimes, and process stability 

Process Design & Flowsheet Development

Provide active technical challenge to Obsideo’s process development, including: 

• Review of: 
  • Comminution circuit selection 
  • Gravity/flotation performance assumptions 
  • Water balance and recycling strategy 

• Validation that: 
• Design reflects real operating conditions (not ideal lab conditions) 
• Equipment sizing aligns with variability and throughput requirements 

Ensure formal flowsheet “freeze points” are only approved when:

• Testwork confidence is adequate 
• Mass balances are stable 
• Key risks are understood and mitigated 

TSF Trade-Off Study Management 

Reflecting the parallel workstream defined in the tender, Sentinel will: 

• Structure and control the TSF trade-off study as a formal decision process 
• Ensure all options are assessed consistently across: Technical viability 
  • CAPEX and OPEX 
  • Environmental and social impacts 
  • Constructability and operational risk 

• Prevent premature selection of TSF solutions 
• Deliver a clear, evidence-based recommendation suitable for Board approval 

Cost Estimation & Financial Integrity

Given Obsideo’s staged cost development approach, Sentinel will: 

• Review cost estimates at each stage of maturity 
  • Ensure: Alignment between design maturity and estimate accuracy 
  • No false precision in early-stage costing 

• Sentinel will validate: 
• CAPEX (target ±15% DFS accuracy) 
• OPEX assumptions (reagents, power, labour, maintenance) 

• Additionally, Sentinel will: 
• Benchmark costs against comparable tungsten operations 
  • Identify: Cost escalation risks 
  • Value engineering opportunities 

Schedule & Critical Path Management

• Develop and maintain an integrated Level 3 schedule, incorporating: 
• Testwork timelines 
  • Design progression 
  • Review and approval cycles 

• Managing testwork-driven critical path risks 
• Avoiding downstream delays caused by late data or rework 

Reporting & Decision Support 

• Provide structured reporting aligned to Trinity governance: 
  • Weekly 
  • Progress vs plan 
  • Testwork updates 
  • Design changes 
  • Immediate risks 

• Monthly 
  • DFS health (cost, schedule, scope) 
  • Stage gate readiness 
  • Key technical decisions required 

• Decision Papers 
  • Flowsheet selection 
  • TSF option selection 
  • Major capital decisions 

• These will be board-ready and defensible

DFS Integration & Finalisation 

• Ensure the final DFS is: 
  • Fully integrated across all disciplines 
  • Internally consistent (no conflicting assumptions) 
    • Aligned with: CPR requirements 
    • Financing expectations 

• Lead: 
  • Final DFS review workshops 
  • Gap analysis prior to issue 

Eligibility and Competency Requirements:

Interested parties must have

• Competency: Proven track record in tungsten feasibility studies, TSF design, and gravity plant engineering.
• Accreditation: Membership in professional organizations (AusIMM, SAIMM, etc.) is required.
• Compliance: Must meet environmental, social, and safety standards in Rwanda.
• Capacity: Ability to manage owner’s team, coordinate consultants, and deliver a complete DFS package.

All interested parties should submit an Expression of Interest in accordance with the below requirements complete with supporting documents.

• Application Cover Letter introducing your Company/Individual expressing interest, availability, and a brief business and experience profile including qualifications and experience.
• CVs of proposed personnel demonstrating skills and status.
• Key personnel CVs for conducting the required technical work
• Summary of qualifications and relevant experience.
• Details of at least three similar projects undertaken in the last five years.
• Certificate of domestic company registration issued by RDB.
• VAT Registration.
• Valid income tax clearance issued by RRA

Submission to be forwarded to tender@trinity-metals.com by not later than 17th June 2026 at 11:00AM Local time. Expressions of Interest received after 17th June 2026 at 11:00AM Local time will unfortunately not be considered.

Further discussion will be undertaken with selected respondents to prove the competence of the bidder and thereafter an invitation to tender will be provided to the bidder.