Linux-Storage System Administrator

Senior Systems Administrator – Enterprise NAS/SAN Storage

Position Overview Play a key role in upgrading, troubleshooting, and optimizing core infrastructure in a critical on-site environment, with a strong focus on enterprise NAS and SAN storage. This senior-level position will lead infrastructure upgrades across Linux, Windows, and enterprise storage, including a new data storage cluster, production data migration, and a new Hyper-V compute environment. The role serves as a senior technical authority for storage design, performance, and data protection while partnering closely with Bioinformatics teams that depend on high-throughput file access.

What You'll Do Enterprise Storage (NAS/SAN) Own the design, build, and lifecycle of enterprise NAS and SAN platforms, including capacity layout, tiering, protection policies, and performance targets. Complete the physical and logical integration of newly racked VAST Data hardware into the core Aliso Viejo network. Configure views, NFS/SMB/S3 protocols, quotas, QoS, snapshots, and replication for production use. Configure and manage NFS v3/v4.x

and SMB/CIFS shares, export policies, and multi-protocol permissions. Integrate storage with Active Directory/LDAP for consistent identity mapping across Linux and Windows clients. Provision and manage block storage over Fibre Channel and iSCSI, including LUN creation and masking, FC zoning, initiator groups, and MPIO/multipathing on Linux and Windows hosts. Design and present shared storage for Hyper-V failover clusters, including Cluster Shared Volumes (CSV) and SMB 3.x

file shares for VM workloads. Plan and execute foundational migrations from legacy storage using tools such as rsync, Robocopy, or vendor migration utilities. Validate data integrity with checksums, minimize cutover downtime, and hand over designated shares to the Bioinformatics team for validation. Monitor IOPS, throughput, and latency; tune storage and network paths for large-file, high-throughput genomics workloads. Produce capacity forecasts that support procurement decisions.

Manage snapshots, replication, and backup integration, including tools such as Veeam, Commvault, or Rubrik. Define and test RPO/RTO targets and conduct regular restore and disaster recovery tests. Plan and execute non-disruptive firmware and software upgrades across storage arrays, controllers, HBAs, and switches. Systems and Infrastructure Deploy, configure, and maintain Linux servers, including RHEL, Rocky/CentOS, or Ubuntu. Perform NFS client tuning, autofs, and LVM administration.

Complete physical installation of new Hyper-V hosts and finalize cluster networking, storage, and configuration for production workloads. Manage Windows Server environments, including Active Directory, GPO, DNS/DHCP, and file-share permissions. Perform hardware audits, patching, and system updates to reduce security risk. Serve as the primary escalation point for complex system and storage failures. Perform root-cause analysis and implement fixes to prevent recurrence.

Apply access controls, encryption, and audit practices supporting a regulated healthcare and laboratory environment. Maintain documentation for system and storage configurations, runbooks, DR plans, and procedures. Mentor junior staff and provide effective knowledge transfer to customer operations teams.

Required Qualifications 7+ years of experience in systems administration or infrastructure engineering, including 5+ years of hands-on enterprise NAS and SAN administration in production environments. Hands-on administration of at least one major enterprise storage platform such as VAST Data, Net App ONTAP, Dell Power Scale (Isilon), Dell Power Store/Unity, Pure Storage, or HPE. Deep working knowledge of NFS…