Linux Administration
Resume:
Charles W Jefferson II
Fairfield, California
*******@*****.***
http://www.linkedin.com/in/CharlesJefferson
Summary of Qualifications
Results-oriented Sr. IT Professional bringing over 20 years of comprehensive experience in systems engineering and administration, data center management, and technical support services. Extensive background in developing and maintaining networking topologies, managing various operating systems and server environments, and supporting complex enterprise infrastructure. Demonstrates strong leadership qualities and excels in communicating technical information effectively to diverse audiences EDUCATION
● Heald College, BS in Information Technology Minor in Electronics Technology
● United States Army Drill Sergeant School (Reserves), Camp Parks, Dublin, California - Enhanced Professional development course. Interim-Secret Clearance held
● United States Army Communications School (Reserves), Camp Parks, Dublin, California
- Specialty Communications Systems. Top Secret Clearance held
● United States Army Air Defense Artillery School, Fort Bliss, El Paso, Texas - Patriot Missile Defense Systems/Communications. Secret Clearance held
● Various Professional Seminars, Certifications, and classes regarding current projects and environment. - Ongoing.
CERTIFICATIONS/LICENSES
● ETA Certified Fiber Optics Installer June 2012
● ETA Certification Administrator June 2012 ●FCC GROL License September 2012
● Certified IBM xSeries Server (2007/2008)
● Security + CE
● LInux + CE
TECHNICAL SUMMARY
● Networking
● Data Center/Colocation Center
● Layer 2/3 Devices
● VOIP
● Email Servers/Clients
● Remote Services Support
● SSH
● SCP
● VMWare
● Linux Multiple Flavors
● Sun Solaris
● AIX
● RHEL Servers and Satellite
● Veritas
● ESX Server
● Windows Servers and Clients
● OS/2
● eComStation
● Data Center Support
● Field Support
● Collocation Support
● Hardware Maintenance and Support
● Backup Systems support
● VoIP Systems/Technology
● Various Blade Server Chassis
● Instruction (Training)
● Team Management/Lead
● Project Management/Technical Lead
● Server Migration/Consolidation
● Proprietary Military Systems
● FBCB2. Systems Imaging
● Disaster Recovery
● C4ISR
● NIPR/SIPR
● BASH Scripting
● Ansible/Ansible Playbook
PROFESSIONAL EXPERIENCE
Lockheed Martin Space/Kaztronix April 2021 - Present Senior Linux Systems Administrator - Experienced in managing and maintaining a secure, closed-area environment encompassing RHEL 6, 7, 8 and 9x servers. Proficient in implementing DISA/DUSA STIG compliance and utilizing Ansible for system management and automation. Expertise includes the administration of various Linux-based services such as POP3 email, NFS, as well as enterprise solutions like Centrify, Jabber/XMPP, Zabbix, GitLab, Splunk (8.2.4), and Request Tracker (5.0). Adept at managing VMware vSphere 6.7/7.x and deploying/managing Docker environments for development and management projects, supporting Python and TWC. Proven ability to maintain patch and compliance
(McAfee/EPO/Trellux), and manage change and distribution through Ansible. Supported RHEL Servers across diverse network environments, including lab, SIPR, and secure air-gapped networks. Managed Red Hat Satellite Server (6.13.x), Red Hat IdM Server (4.9.x), GitLab, Git, Jira, Confluence and Splunk aggregate servers. Oversaw patch management for a total of 172 servers across the domain. Successfully executed server and workstation upgrades from RHEL 7.9 to 8.x & 9.x. Skilled in managing RHEL systems via Satellite and ESXi/vCenter, ensuring robust server compliance and security, performing server tuning, and managing both applications and user domain accounts. Experience includes performing IdM and Satellite Server upgrades and RHEL Systems management via Windows Active Directory. To include RHEL Servers being joined to the AD domain. All work performed within a secure environment. Clearance required.
SAP/NS2-Comtech LLC September 2020 - February 2021 Senior Linux Systems Engineer responsible for the remote support and maintenance of RHEL 6, 7, and 8 environments, including RHEL server deployments on AWS. Possesses a strong understanding of DISA STIGs and leverages Ansible for scripting and deployment, complemented by robust BASH scripting capabilities. Provides critical day-to-day deployment and systems support to customers, proactively addressing and troubleshooting system issues to ensure a high uptime of 99.96% for client devices. Expertise extends to supporting RHEL systems within VMware/vSphere infrastructures. Accountable for managing and maintaining comprehensive system patching, bug fixes, and security updates across a large inventory of over 800 offsite RHEL servers. Strictly adheres to change management protocols for all system modifications and efficiently resolves miscellaneous issues as they arise. Experience working effectively in both AWS and on-premises environments
Apogee Engineering/AAG U.S. Army September 2017 - November 2020 Senior Linux Systems Engineer/Linux Team Lead responsible for the remote support and maintenance of RHEL 6, 7, and 8 environments, including RHEL server deployments on AWS. Possesses a strong understanding of DISA STIGs and leverages Ansible for scripting and deployment, complemented by robust BASH scripting capabilities. Provides critical day-to-day deployment and systems support to customers, proactively addressing and troubleshooting system issues to ensure a high uptime of 99.96% for client devices. Expertise extends to supporting RHEL systems within VMware/vSphere infrastructures. Accountable for managing and maintaining comprehensive system patching, bug fixes, and security updates across a large inventory of over 800 offsite RHEL servers. Strictly adheres to change management protocols for all system modifications and efficiently resolves miscellaneous issues as they arise. Experience working effectively in both AWS and on-premises environments.
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