Server Administrator

Overview Calspan is seeking a highly skilled Systems Administrator to manage our core infrastructure and HPC environments. This role is responsible for the stability of our Windows Servers (including Active Directory, GPO, Domain Controllers, Azure, DHCP, DNS), Red Hat Enterprise Linux (RHEL) clusters, virtualization layer, and HPE Alletra/Nimble storage systems. You will act as the primary administrator for our engineering compute resources, supporting critical simulation software such as Ansys Fluent and Star-CCM+ . The ideal candidate is an "automate-first" professional who combines strong Linux skills with the ability to troubleshoot complex engineering workloads. Responsibilities HPC Cluster Administration Deploy, configure, and manage Linux-based HPC clusters. Monitor node health, job queues, and system performance to ensure maximum throughput for engineering simulations. Application Support: Troubleshoot and optimize engineering simulation software, specifically Ansys Fluent and Star-CCM+ . Resolve issues related to MPI libraries, parallel processing, and solver convergence errors caused by infrastructure constraints. License Management: Manage floating license servers (e.g., FlexNet/FlexLM) for engineering applications to ensure availability and compliance. Job Scheduling: Administer workload managers/job schedulers (e.g., Slurm, PBS, or LSF) to prioritize and distribute engineering jobs effectively. RHEL Administration Expert-level management of Red Hat Enterprise Linux . Handle kickstart deployments, satellite management (if applicable), kernel tuning, and security hardening. Virtualization: Manage the hypervisor layer (e.g., VMware vSphere, HyperV). Handle VM provisioning, resource pooling (CPU/RAM), and performance tuning for virtualized engineering workloads. Identity & Access Management: Administer user access in Active Directory/Entra ID, ensuring seamless authentication for both Windows and Linux/HPC environments (via LDAP/SSSD). Storage Management Manage the complete lifecycle of HPE Nimble arrays. Optimize storage protocols (NFS/iSCSI) to handle the high I/O throughput required by HPC simulations. Utilize HPE InfoSight to monitor trends and forecast storage needs for large engineering datasets. Maintain robust backup strategies and Disaster Recovery plans for critical engineering data. Automation Write and maintain scripts using Python, Bash, or PowerShell to automate cluster node provisioning and system maintenance. Use tools like Ansible to enforce consistent configurations across the HPC nodes and general server estate. Qualifications 3–5+ years of experience in Linux Administration with specific exposure to HPC environments. Deep proficiency in Red Hat Enterprise Linux (RHEL) . Experience administering HPC clusters and supporting engineering applications ( Ansys Fluent, Star-CCM+ ). Hands‑on experience with HPE Nimble Storage . Proficiency in Bash or Python for system automation. Bonus Skills Experience with InfiniBand or high‑speed low‑latency networking. Familiarity with job schedulers like Slurm, PBS Pro, or LSF . Knowledge of containerized HPC workloads (Singularity/Apptainer). Experience with HPE InfoSight analytics. Salary Range (min) USD $80,000.00/Yr. Salary Range (max) USD $110,000.00/Yr. Calspan is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status. Calspan supports a safe and drug‑free workplace through pre‑employment background checks and drug testing. All candidates must be eligible to work in the United States. #J-18808-Ljbffr Calspan