Expert Systems Administrator (Linux / Windows) - Overlap of 3 hours with Japan

Project overviewWe are looking for a very senior Expert Systems Administrator with a strong Linux background and mid-level Windows experience. This role focuses on leading and driving clients’ on-premises business engagements. This is an end-customer-facing, hands-on technical role responsible for designing, deploying, and supporting enterprise-scale solutions in complex end-customer environments. You will serve as the trusted technical advisor for end-customers, bridging Customer Success, R&D, and Product Management, and acting as the voice of the end-customer within the organization. Given the seniority of the role, a high level of autonomy and ownership is expected.Responsibilities• Design, operate, and maintain Linux-based systems and services in production environments • Engage directly with customers to understand their infrastructure, security requirements, and business objectives. • Serve as the primary technical point of contact for on-premises deployments and upgrades. • Administer and support Linux servers and related services as a secondary platform • Drive deployment, integration, and optimization of platforms in customer environments. • Troubleshoot complex system and network issues across multiple environments • Work directly with end users to understand issues, explain solutions, and provide effective support • Perform and oversee complex upgrades, migrations, and architecture transformations. • Participate in post-deployment reviews to ensure reliability, performance, and compliance with best practices. • Collaborate with networking and security teams on infrastructure-related initiatives • Represent the voice of the customer to internal teams, influencing roadmap and product decisions. Requirements• 10+ years of experience as a Systems Administrator or similar role • Excellent customer-facing communication skills, capable of translating technical solutions into business value. • Strong expertise in Linux system administration (production environments) • Proven ability to design and deliver complex, high-availability enterprise deployments. • Strong experience in administering Linux server environments, complemented by foundational experience with Windows environments. • Proven experience with networking concepts (TCP/IP, DNS, DHCP, NAT, routing, firewalls) • Strong troubleshooting skills across systems and network layers in physical, virtualized and containerized environments • Scripting experience using Bash and/or Python for automation and tooling • Experience supporting end users in professional environments • Ability to work independently and take ownership of complex systems Nice to Have • Knowledge of cybersecurity principles and best practices • Familiarity with monitoring, logging, and alerting solutions • Working knowledge of cloud and hybrid architecture. • Experience with DevOps/CI-CD processes for product deployment and upgrades. Soft Skills • Excellent communication skills, including the ability to explain technical topics to non-technical users • Strong interpersonal skills and a service-oriented mindset • Calm and professional approach when handling incidents and user issues • Strong problem-solving and analytical skills • Sense of ownership and accountability for systems and services What you’ll bring • Passion for customer success and delivering secure, stable, and performant solutions. • Ability to operate across technical, operational, and executive levels. • Drive to improve on-premises deployment methodologies and product integration continuously.