Linux-Storage System Administrator

Proven experience with Fibre Channel and iSCSI, including switch zoning using Brocade or Cisco MDS, LUN provisioning and masking, and host multipathing using DM-Multipath and Windows MPIO. 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.

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, NetApp ONTAP, Dell PowerScale (Isilon), Dell PowerStore/Unity, Pure Storage, or HPE.

• Deep working knowledge of NFS v3/v4.x and SMB 2/3, including export and share permissions, multi-protocol access, and AD/LDAP identity mapping.

• Proven experience with Fibre Channel and iSCSI, including switch zoning using Brocade or Cisco MDS, LUN provisioning and masking, and host multipathing using DM-Multipath and Windows MPIO.

• Track record of planning and executing multi-terabyte to petabyte-scale migrations with integrity validation and minimal downtime.

• Strong understanding of RAID and erasure coding, snapshots, replication, enterprise backup tools, and disaster recovery planning and testing.

• Ability to diagnose and tune IOPS, throughput, and latency across storage, network, and host layers.

• Senior-level Linux administration, shell scripting using Bash and Python, and server hardening.

• Proven ability to manage Windows Server and Active Directory alongside Linux environments.

• Hands-on experience building and supporting Hyper-V failover clusters, including shared storage for CSV.

• Solid understanding of TCP/IP, VLANs, DNS, DHCP, and firewalls.

• Ability to work independently in a fast-paced, on-site environment, lead multiple hardware and software projects simultaneously, and communicate clearly with technical and scientific stakeholders.

Preferred Qualifications

• VAST Data experience.

• Storage certifications such as NetApp NCIE or NCAP, Dell Technologies Proven Professional (PowerScale or PowerStore), Pure Storage FlashArray Architect, SNIA SCSP/SCSE, or VAST Data training.

• Systems certifications such as RHCSA, RHCE, CompTIA Linux+, or Microsoft Certified: Windows Server Hybrid Administrator Associate.

• Experience supporting bioinformatics, genomics, or other high-throughput research workloads.

• Experience in high-availability, regulated environments such as healthcare, clinical labs, or life sciences.

• Experience with object storage (S3) and cloud tiering or archive to AWS or Azure.

• Experience automating storage and infrastructure tasks with Ansible, PowerShell, or vendor REST APIs.

• Exposure to VMware vSphere or KVM in addition to Hyper-V.

• Familiarity with high-speed storage networking, including 25/100GbE, jumbo frames, and RDMA/RoCE or InfiniBand.

#LI-SB1 #LI-Onsite #SystemsAdministrator #LinuxAdministrator #WindowsServer #ActiveDirectory #HyperV #SAN #NAS