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Umar Usman

@umarusman3

Linux systems administrator at Newport News Shipbuilding (HII), supporting 200+ RHEL servers and automating Cohesity agent upgrades.

United States

Message

At Newport News Shipbuilding (HII), I administer enterprise RHEL servers for business-critical engineering workloads, including monthly patching across 200+ servers and DISA STIG remediation. I also support VMware environments, NetApp ONTAP and Dell EMC Isilon storage, and Cohesity backup and recovery validation.

I automated Cohesity agent upgrades across RHEL servers with a Bash script, replacing manual server-by-server work. Earlier, I maintained Linux/CentOS systems and administration services at Hartford Technology Rentals, and supported users and infrastructure at Sixteenth Street Community Health Centers.

Experience

Work history, roles, and key accomplishments

Current

Linux System Administrator

Current

Newport News Shipbuilding (HII)

Jan 2022 - Present (4 years 9 months)

Administer enterprise RHEL servers supporting business-critical engineering workloads, including build, configuration, patching, performance tuning, and troubleshooting. Manage VMware vCenter/ESXi, NetApp ONTAP, Dell EMC Isilon storage, and Cohesity backups, and execute monthly patching across 200+ RHEL servers under formal change control.

VMWare VCenter VMware ESXi NetApp ONTAP Isilon Cohesity BASH AWX Ansible Tower DISA STIGs SCAP Tenable Nessus ACAS Splunk Syslog LVM XFS EXT4 NFS CIFS HP ILO SMAX RHEL Active Directory PKI

IT Support Specialist / Systems Support

Sixteenth Street Community Health Centers

Jan 2020 - Jan 2022 (2 years)

Supported users, endpoints, applications, and infrastructure across a multi-site healthcare environment, providing remote and hands-on troubleshooting. Administered user access and supported Windows-based systems while following security and privacy procedures.

Windows Active Directory Troubleshooting Incident resolution Documentation

Linux Systems Administrator

Hartford Technology Rentals

Jan 2018 - Jan 2020 (2 years)

Installed, configured, maintained, and troubleshot Linux/CentOS systems in mixed physical and virtual environments. Administered Apache, SSH, LDAP, Kerberos, and CIFS services, and created shell/cron-based automation for recurring tasks.