Solutions Architect / Presales Engineer

About the role

Customer Solution Architect / Presales Engineer (Connectivity & Managed Services)

Partner with sales teams to lead technical discovery, gather requirements, and architect integrated solutions spanning core WAN, optical transport, and enterprise LAN/edge infrastructure. Design high-availability optical and transport network topologies, manage end-to-end solution architecture, and lead technical response strategies for enterprise RFPs and tenders.

Key Responsibilities

• End-to-End Solution Architecture: Partner with sales teams to lead technical discovery, gather requirements, and architect integrated solutions spanning core WAN, optical transport, and enterprise LAN/edge infrastructure.

• Core Transport & Optical Mastery: Design high-availability optical and transport network topologies utilizing:

  • DWDM / Optical Transport: High-capacity wavelength services, dark fibre topology, FlexGrid/ROADM optical architectures, and ultra-low latency optical pathing.

  • DCI & Metro-Ethernet: High-throughput data center interconnects, E-Line (P2P), and E-LAN (MP2MP) Layer 2 Ethernet connectivity.

  • IPVPN & Managed Internet: MPLS Layer 3 VPNs, multi-homed BGP routing, clean-pipe DDoS mitigation, and business internet delivered over SPTel’s Software-Defined Network.

• Managed Edge & Enterprise Services Expertise: Architect fully managed enterprise solutions incorporating:

  • SD-WAN: Software-defined overlay networks, dynamic path selection, multi-cloud connectivity, and centralized cloud orchestration.

  • Managed Security & Firewall: Next-Generation Firewalls (NGFW), unified threat management (UTM), zero-trust access control, and cloud security integrations.

  • Managed Enterprise Wi-Fi & Switching: High-density enterprise Wi-Fi 6/6E deployment models, cloud-managed access switches, stackable core switches, and PoE budgeting for enterprise premises.

• RFP & Technical Bidding: Lead technical response strategies for enterprise RFPs, RFIs, and tenders. Author High-Level Designs (HLD), Low-Level Designs (LLD), Bill of Materials (BOM), and detailed technical proposals.

• Customer Presentation & POCs: Present solution architecture, network diversity models, and managed service SLAs to key enterprise stakeholders (CTOs, IT Directors, Infrastructure Managers). Direct and execute Proof-of-Concept (POC) demonstrations.

• Cross-Functional Alignment: Coordinate with Product Management, Network Engineering, Implementation, and Service Operations to ensure smooth transition from presales design to post-sales deployment and managed support.

Requirements

• Bachelor's Degree or Diploma in Telecommunications, Computer Science, Electrical/Electronic Engineering, or related fields

• Minimum 4–6 years of presales, solution architecture, or network engineering experience within an ISP, Telecommunications Provider, System Integrator, or Managed Service Provider (MSP)

• Deep technical mastery of Optical Transport Networks (OTN / ITU-T G.709 standards), Wavelength Division Multiplexing (C-band/L-band), and FlexGrid/Gridless ROADM architectures

• Practical expertise in 100G/400G/800G coherent optics (ZR/ZR+), optical link budget calculations, OSNR (Optical Signal-to-Noise Ratio), dispersion management, and non-linear optical effects

• Hands-on familiarity with optical protection schemes including 1+1 OLPS (Optical Line Protection Switch), ASON/GMPLS mesh restoration, and dark fibre/spectrum path design

• Proven track record designing high-capacity, sub-millisecond low-latency DCI topologies linking major Singapore carrier-neutral and hyperscale data centers (e.g., Equinix, Global Switch, Digital Realty, Singtel DC).

• In-depth knowledge of Layer 1/Layer 2 wire-speed optical encryption protocols (MACsec, Quantum-Safe / QKD integration) for ultra-secure data transport.

• Hands-on knowledge of high-density 100G/400G client handoffs, transponder/muxponder architectures, and DCI-specific overlay/underlay integration (e.g., EVPN-VXLAN over DWDM/OTN).

• Strong foundation in BGP-4, OSPF, MPLS (L2VPN / L3VPN / VPLS), Segment Routing (SR-MPLS / SRv6), and Metro-Ethernet (MEF 3.0 CE standards)

• Architecture experience with enterprise Wi-Fi (e.g., Cisco Meraki, Aruba, Ruckus), managed switching (L2/L3 stackable switches), Next-Gen Firewalls (Fortinet, Palo Alto), and SD-WAN platforms.

• Exceptional presentation, technical proposal writing, and consultative selling skills

• Strong problem-solving capability with a track record of translating business goals into resilient technical architecture