Sr. Systems Administrator - Linux
Objective :
Responsible for effective provisioning, installation/configuration, operation, and maintenance of systems hardware and
software and related infrastructure. Participates in technical research and development to enable continuing innovation within
the infrastructure. Ensures that system hardware, operating systems, software systems, and related procedures adhere to
organizational values and enabling ADC Teams. Responsibilities on these systems include SA engineering and
provisioning, operations and support, maintenance and research and development to ensure continual innovation. Works
under limited supervision.
Responsibilities :
SA Engineering and Provisioning:

• Engineering of SA-related solutions for various project and operational needs
• Install new / rebuild existing servers and configure hardware, peripherals, services, settings, directories, storage, etc. in accordance with standards and project/operational requirements
• Install and configure systems to supports ADC infrastructure and applications
• Strive for continuous improvement and build continuous integration, continuous development, and constant deployment pipeline (CI/CD Pipeline)
• Contribute to and maintain system standards
• Research and recommend innovative, and where possible automated approaches for system administration tasks. Identify approaches that leverage our resources and provide economies of scale

Operations and Support:

• Perform daily system monitoring, verifying the integrity and availability of all hardware, server resources, systems and key processes, reviewing system and application logs, and verifying completion of scheduled jobs such as backups
• Perform regular security monitoring to identify any possible intrusions
• Perform daily backup operations, ensuring all required file systems and system data are successfully backed up and sent off site as necessary
• Perform regular file archival and purge as necessary
• Create, change, and delete user accounts per request
• Provide support per request from various constituencies. Investigate and troubleshoot issues
• Evaluate application performance, identifypotential bottlenecks, develop solutions, and implement them
• Working knowledge and firm understanding of TCP/IP networks, LAN/WAN technologies, WLAN, VOIP, routing protocols
• Implementproactive monitoring, alerting, and trend analysis; managing periodic reportingon the progress to the management
• And any other required tasks as needed

Maintenance:

• Apply OS patches and upgrades on a regular basis, and upgrade administrative tools and utilities. Configure / add new services as necessary
• Upgrade and configure system software that supports ADC infrastructure and applications per project or operational needs
• Maintain operational, configuration, or other procedures
• Perform periodic performance reporting to support capacity planning
• Perform ongoing performance tuning, hardware upgrades, and resource optimization as required. Configure CPU, memory, and disk partitions as required
• Maintain data center environmental and monitoring equipment
• Understand when hardware and firmware updates are needed and update them as necessary

Qualifications:

5-7 years' experience with Linux engineering (RHEL, CentOS, Fedora)

Requires knowledge of web technologies (HTTP/s, Apache, Tomcat, HTTP Proxies, certificates, load balancers)

Requires knowledge of networks

Required knowledge Experience with Relational and Non-relational databases such as SQL & NoSQL

Required knowledge creating, implementing, supporting, and changes to the CI/CD pipeline using GitLab or Jenkins

Requires knowledge of Active Directory, Group Policy

Required Experience with automated patch management Satellite servers

Preferred Experience with project management methodologies and practices

Preferred Experience with SAN Storage

Preferred Experience working with Cloud platforms such as AWS (EC2, ECS)

Preferred knowledge of VMWare ESXi, VMWare View