• Lead presales technical engagements: gather requirements, translate business outcomes into functional and technical architectures, and present proposals to customers and partners • Architect end-to-end HPC/AI infrastructure: compute/GPU nodes, storage, interconnects, orchestration, monitoring, and management • Design and validate high-performance networking for east–west and north–south traffic (InfiniBand and high-speed Ethernet); size interconnects and topology for GPU-accelerated workloads • Create detailed BOMs, rack elevations, cable/power plans, PDU layouts, and facility-fit analyses (power, cooling, rack density, liquid cooling considerations) • Build and run POCs/demos, run benchmarks, tune systems, and document results and recommendations • Prepare technical content for RFI/RFP responses, risk assessments, and implementation plans • Collaborate cross-functionally with sales, engineering, product management, services, and partners to ensure deliverability and commercial alignment • Mentor junior presales engineers and maintain reusable presales collateral and demonstration playbooks • Represent the organization at customer sites, partner labs, and industry events as required