Projects

Proven assurance delivery on complex rail and transit programs worldwide.

The NEXUS team supports major rail and transit programs as a plug-in system and safety assurance partner to public agencies, infrastructure owners, delivery partners, and joint ventures. With diverse experience across Canada and internationally, we bring governance, stakeholder alignment, and hands-on engineering support that keeps assurance, compliance, and project delivery progressing across the full lifecycle—from Concept and Design through Construction, Testing & Commissioning, Handover, and Revenue Service. As a boutique team, we provide end-to-end SSA leadership and integrate quickly to cover full program needs without adding overhead. 

Program delivery focus: Concept & Design • Construction • Testing & Commissioning • Handover • Revenue Service • Governance • Stakeholder alignment • Decision support • Accountability • Compliance 

Delivery frameworks: EN 50126–50129 (CENELEC-aligned practice) • North American delivery & review expectations (FTA/CMREA) 

Selected Rail & Transit Program Experience

Canadian LRT Program — Canada

  • Role: System and Safety Assurance (SSA) Management | Design & Build (Systems & Civil JV)
  • Program value: C$2.6B Design & Build
  • Key facts: LRT • Stations/stops • bridges/elevated guideways • OMSF/depot • OCC

NEXUS provides end-to-end System & Safety Assurance leadership for this major Design–Build LRT program. We embed within design, integration, and testing teams to keep assurance, compliance, and acceptance activities progressing from design through commissioning. (Delivery is ongoing.)

Scope (systems & infrastructure)

OMSF/depot facilities and equipment • OCC and control platforms • Communications systems (incl. SCADA and data platforms) • Signalling (S&TC) • Traction Power • EMC/stray current • Trackworks and guideway structures (incl. bridges/elevated) • Stations/stops • Roadworks and grade crossings • Fire/Life Safety 

What we delivered

  • Established SSA governance (roles, decision forums, gates, and reporting) across Safety, RAM, Security, Human Factors, Road Safety, and V&V. 
  • Developed and implemented the System Assurance Strategy aligned with the Project Agreement, operator requirements, local regulations, and industry best practices. 
  • Led Hazard Log governance and closure readiness (workshops, quality rules, action tracking, metrics and transfer of operational mitigations). 
  • Managed V&V and evidence readiness, including traceability and closure tracking through key gates. 
  • Coordinated assurance activities with Design, Integration, Testing & Commissioning, Configuration, and Quality teams to maintain momentum and schedule discipline. 
  • Supported certification / acceptance readiness through compliance checks, review preparation, and targeted evidence audits. 
  • Maintained stakeholder alignment with the Contracting Authority and program partners to meet assurance objectives. 

Hazel McCallion Line (Hurontario LRT) — Ontario, Canada

  • Role: System Safety Management | Design & Build (Civil JV)
  • Program value: C$5.6B DBFOM (Mobilinx)
  • Key facts: 18 km of LRT • 19 stations/stops • Bridges • OMSF

The 18-kilometre Hazel McCallion Line will feature 19 stops, travel through two urban growth centres, and connect to major transit systems. The line will operate in a dedicated lane, enabling a smooth, reliable, and convenient ride along the region’s busiest corridor. (Construction is ongoing.)

Scope (civil & infrastructure)

OMSF/Depot facilities and building systems • Depot equipment • Traction Power Substations (TPSS) • Trackworks • Stops/Stations and associated civil/MEP interfaces • Roadworks and corridor interfaces • Bridges/structures • Fire/Life Safety systems (incl. station ventilation systems) 

What we delivered

  • Led the Civil JV safety delivery across Design & Build, providing hands-on leadership and day-to-day direction to a multi-discipline team.
  • Established System & Safety Assurance governance and delivery cadence for civil, track and depot/building scopes—workflows, gate readiness, and decision support.
  • Directed Hazard Log governance and closure readiness, running stakeholder workshops, enforcing quality rules, and driving evidence-backed closure.
  • Maintained V&V alignment and evidence readiness against delivery milestones, supporting certification and commissioning preparation.
  • Acted as the coordination point across the CSSO, Systems Engineering teams, Contracting Authority, and delivery partners—keeping assurance, compliance, and stakeholder alignment moving.

Experience delivered as part of a delivery partner team. 

Tel Aviv Purple Line LRT — Tel Aviv Metropolitan Area, Israel

  • Role: System Assurance Manager (RAMS) | Design, Build & Maintain (DBFM)
  • Program value: US$3.6B (DBFM) • Concession: 25 years
  • Key facts: 27 km • 43 Stations • 6 cities • ~256,000 daily passengers • headway ~4 minutes

The Purple Line is a major urban LRT program crossing one of the most complex and dense metropolitan environments in the region. NEXUS provided system and safety assurance leadership through the design phase across infrastructure, systems, and rolling stock—supporting design readiness and long-term operations considerations. (Support delivered through design.)

Scope (systems, assets, and lifecycle)

Rolling Stock (LRVs) • Traction Power and OCS • Signalling & Train Control (S&TC) • Track and civil works • Stations • Depot and workshop facilities (civil, MEP, equipment) • Operations Control Center (OCC) and Communications/IT platforms • Fire/Life Safety • EMC/stray current • Operations & Maintenance readiness.  

Standards focus: EN 50126–50129 (CENELEC-aligned practice) 

What we delivered

  • Led system assurance and safety integration across the full program scope, coordinating multi-discipline teams and stakeholders.
  • Produced project-level safety and RAMS documentation, including system-level safety documentation, Hazard Log governance, and safety justifications.
  • Managed Hazard Log development, governance, and closure readiness, ensuring traceability from hazards to mitigations and verification evidence.
  • Supported Safety Case inputs and readiness activities, including evidence structuring and targeted assurance/audit checks.
  • Oversaw assurance across critical subsystems (rolling stock, traction power, signalling, communications/OCC, depot systems, civil/track, and fire/life safety).
  • Integrated Human Factors considerations for OCC/operator interfaces and operational scenarios to support safe operations and maintainability.
  • Contributed to O&M readiness by aligning assurance evidence with operational procedures, maintenance concepts, and acceptance milestones.

Experience delivered as part of a delivery partner team (via CAF TE).

Tel Aviv Red Line LRT — Tel Aviv Metropolitan Area, Israel

  • Role: Safety & Systems Assurance (Safety Integration / RAMS) | Systems Integration | Design to Permit-to-Operate (PTO)
  • Key facts: 25 km corridor • 12 km underground • 34 stations (10 underground) • ~70M annual passengers • High-capacity control centers (OCC/SOC/NOC/CSOC) • GoA4 operations

The Red Line is a flagship metropolitan LRT program combining dense urban operations, extensive tunneling, and heightened security and cyber requirements. Assurance delivery supported multi-contractor systems integration and operational readiness through to Permit to Operate (PTO).

Scope (systems, assets, and lifecycle)

Underground stations and tunnel interfaces • Rolling Stock (LRVs) • Signalling (CBTC/ATO – GoA4) • Communications and control systems • OCC and security operations functions (incl. cyber monitoring) • Traction power and energy systems • Trackworks • Platform safety systems (e.g., PSD where applicable) • Fire/Life Safety and MEP • Depot and maintenance operations • Operational mitigations transfer. 

Standards focus: EN 50126–50129 (CENELEC-aligned practice) 

What we delivered

  • System and safety integration across multiple subsystems and contractors, aligning assurance activities with delivery milestones and operational readiness.
  • Planned and coordinated the program’s safety deliverables and assurance evidence, ensuring consistency across disciplines and interfaces.
  • Produced core safety and RAMS documentation, including Design Safety Case, Technical Safety Cases and inputs to the Overall Safety Case for handover.
  • Governed Hazard Log and V&V activities across the metro system scope, including control measure ownership, evidence expectations, and lifecycle tracking.
  • Chaired Hazard Review Panels and integration workshops to drive mitigation closure, interface alignment, and transfer of operational mitigations into operations and maintenance.
  • Coordinated responses and evidence packages addressing Independent Safety Assessor (ISA) comments supporting Safety Case readiness and Permit to Operate (PTO) milestones.
  • Supported assurance integration for high-security environments, including physical security features and cyber security considerations for critical operational systems.

Experience delivered as part of a delivery partner team (via Deutsche Bahn E&C). 

Doha Metro – Red Line North (RLN) — Doha, Qatar

  • Role: Safety & System Assurance (SSA) / Design Verification Engineer (DVE)
  • Program value: US$600M (Rizzani de Eccher)
  • Delivery model: Design & Build | Lifecycle: Design to Testing & Commissioning readiness / PTO support
  • Key facts: ~6.3 km works (elevated + at-grade + trough/tunnel + station sections) • 2 stations (Qatar University, Lusail) • stabling yard + power/technical buildings

Provided independent Systems & Safety Assurance (SSA) / Design Verification (DVE) support to confirm compliance with Qatar Rail Employer’s Requirements and international standards—ensuring audit-ready evidence across safety, RAM and EMC for multidisciplinary station and infrastructure systems.

Scope (systems, assets, and lifecycle)

Stations (Qatar University, Lusail) • Elevated and at-grade guideway sections • Trough/tunnel and cut-and-cover interfaces • Traction power and technical buildings (ITPS / motor control rooms) • Stabling yard (Lusail) • MEP systems (HVAC, power, earthing/bonding, lighting) • Control and automation systems (BACS/SCADA interfaces where applicable) • Fire & Life Safety systems • EMC / stray current considerations • Requirements, verification and evidence traceability across design-to-T&C readiness / PTO support. 

Standards focus: EN 50126–50129 (CENELEC-aligned practice) 

What we delivered

  • Ensured safety processes and assurance activities were followed and compliant with Qatar Rail governance and Employer’s Requirements.
  • Verified multidisciplinary design documentation for MEP systems (HVAC, power systems, controls/BACS, fire & life safety) including Safety, RAM and EMC considerations.
  • Verified/certified testing procedures and supported safety verification & validation of RAMS activities across lifecycle gates.
  • Delivered requirements management & traceability (engineering + safety) following Qatar Rail procedures using ComplyPro.
  • Supported planning, quality and schedule KPIs across distributed teams (Qatar + remote support).
  • Supported hazard log / V&V and assurance evidence readiness toward acceptance and Permit to Operate.

Project delivered as part of a delivery partner team (via Saitec).

Doha Metro – Hamad International Airport (HIA) T1 Station | Doha, Qatar

  • Role: Safety & System Assurance (SSA) / Design Verification Engineer (DVE)
  • Program value: US$200M (Rizzani de Eccher)
  • Delivery model: Design & Build | Lifecycle: Design → Testing & Commissioning readiness / PTO support
  • Key facts: Underground station • integrated switchbox • pedestrian interconnector bridge • GSAS recognition (Construction Management – Class A; Design & Build – 4-star) • Client environment: Qatar Rail Employer’s Requirements + international rail expectations

 

Underground airport metro station integrated within Hamad International Airport, including an integrated switchbox and a pedestrian interconnector bridge across roadway interfaces. Delivered SSA/DVE assurance aligned Qatar Rail compliance and applicable international standards, maintaining audit-ready evidence across Safety, RAM, and EMC and keeping acceptance readiness on track in a high-interface environment.

Scope (systems, assets, and lifecycle)

Underground station systems and interfaces • Integrated switchbox and roadway interface works • Pedestrian interconnector bridge and access/egress interfaces • MEP systems (HVAC, power, earthing/bonding, lighting) • Control and automation systems (BACS/SCADA interfaces where applicable) • Fire & Life Safety systems • EMC / stray current considerations • Requirements, verification and evidence traceability across design-to-T&C readiness / PTO support. 

Standards focus: EN 50126–50129 (CENELEC-aligned practice) 

What we delivered

  • Delivered the same SSA/DVE service scope as RLN, applied to a high-criticality airport station environment—maintaining governance, compliance, and evidence readiness across delivery gates.
  • Performed design verification for station systems (MEP and life safety), ensuring Safety, RAM and EMC expectations were addressed.
  • Supported test and commissioning readiness, including verification/certification support for procedures and evidence needed for acceptance.
  • Delivered requirements and evidence traceability (engineering + safety) in ComplyPro to maintain audit-ready alignment.
  • Supported hazard log / V&V activities and maintained assurance evidence readiness toward acceptance and Permit to Operate (PTO).

Project delivered as part of a delivery partner team (via Saitec). 

High-Speed Rail (Communications & Auxiliary Systems) — Spain (La Robla–Pola de Lena / Pajares corridor)

  • Role: Fixed Communications & Auxiliary Systems (Design / Integration / Construction)
  • Program value: ~€4.0B (reported investment) 
  • Key facts: 50 km corridor • 12 tunnels + 10 viaducts • ~80% in tunnel • Pajares Base Tunnel ~25 km
  • Safety & resilience highlights (program-level): 58 pressurized emergency exits ~every 400 m (Pajares tunnel)

 

A flagship Spanish high-speed rail corridor with extreme tunnel/viaduct intensity, where communications and auxiliary safety systems are critical to operational safety, emergency response, and asset protection—especially across long tunnel sections.

Scope (systems, assets, and lifecycle)

Linewide telecoms + auxiliary/security systems supporting tunnel and corridor operations: CCTV/video surveillance, access control, intrusion detection/perimeter interfaces, intercoms/emergency communications, comms backbone / transmission (IP/MPLS, Ethernet, SDH), auxiliary power/protection interfaces, and integration interfaces with signalling, SCADA / control networks, and third-party platforms

What we delivered

  • Engineered and integrated communications + security/auxiliary systems for a high-criticality HSR environment (tunnels/portals/line assets).
  • Produced technical specifications, interface descriptions (ICDs), and technical documentation supporting procurement and delivery (incl. supplier comparison / selection packages).
  • Led coordination with suppliers/subcontractors and interfaced directly with the client and stakeholders for design closure and readiness.
  • Executed test planning and support (factory/site phases as applicable), ensuring systems met functional and operational expectations.
  • Drove interfaces with third-party railway systems (e.g., signalling, comms networks, SCADA/control) to reduce integration risk.

Experience delivered as part of a delivery partner team (via INABENSA / ABENGOA). 

What these programs demonstrate 

Repeatable delivery capability across complex rail programs. From dense urban LRT corridors to airport stations and metro networks, delivery remains structured, defensible, and acceptance-ready.

International experience across North America, the Middle East, and Europe 

Proven delivery on complex programs (metros, LRT, underground/tunnel environments, OCC/communications, multi-contractor integration) 

Governance & decision support that keeps delivery aligned and moving

Hazard governance and safety documentation built for closure and acceptance 

Lifecycle evidence discipline from design through testing & commissioning, handover, and revenue service—grounded in EN 50126–50129 practices and aligned to local expectations