Linux Systems Engineer

Communication Technology Services (CTS) is one of the largest integrators and managed service providers for enterprise cellular networks in the U.S., specializing in the design, installation and support of Distributed Antenna System (DAS), Small Cell, and 4G/5G Private Wireless Networks for Enterprise. They are seeking a Linux Systems Engineer to support their Data Center Operations team, responsible for managing physical and virtual computing environments in a Linux-based data center.

Responsibilities:

• This role is responsible for supporting physical and virtual computing environments, in a Linux-based data center environment
• RedHat/CentOS/Rocky - Administration, troubleshooting, and security of CentOS 7 and 9
• Linux iscsi – Attaching, disconnecting, and manipulating iscsi block devices using iscsiadm, LVM, and multipath
• Linux KVM virtualization – Creating, copying, management, and monitoring of virtual guests
• MySQL Database – Administration, Replication, Clustering, backups, and SQL queries
• IP networking – IP addressing and subnetting, network address translation, routing protocols, Linux iptables, Linux bridging
• Data munging – Extracting useful information from various sources including log files and databases then presenting the data in a machine or human readable format
• Participate in a 24x7 on-call rotation
• Develop Knowledge Base articles and Standard Operating Procedures
• Investigate, diagnose and resolve production issues as logged by monitoring tools or as reported by customers

Requirements:

• At least 10 years of experience supporting physical and virtual network and computing environments, in a Linux-based data center environment
• Relevant experience would include physical and virtual server implementation, operation and maintenance, SAN, NFS, LVM, iscsi, Linux-ha, DevOps, 24x7x365 operations, HP Proliant, HPE Synergy, Dell, SuperMicro
• Proficient at troubleshooting production issues, solving problems, and implementing updates to production software
• Understanding of internet protocols including HTTP, DNS, RADIUS, SSH, and SMTP
• Analyzing packet captures to distinguish between problems at the protocol level vs. network connectivity
• Experience with writing and troubleshooting Perl, Python or Linux Shell Scripts required
• Ability to work outside of normal business hours when needed
• Ability to travel on an 'as needed' basis when required, perhaps quarterly
• Experience with OpenNebula virtualization management helpful
• Experience with Cacti, Nagios, Prometheus, Grafana monitoring systems strongly desired
• Experience with Virtualization technologies (Linux KVM preferred) strongly desired
• Experience with MySQL administration, clustering, replication strongly desired
• Experience with Container technologies and supporting tools (eg Docker, Kubernetes, Rancher)
• Experience with Clustering technologies (eg PaceMaker)
• Working knowledge of SAN systems, especially in a ZFS environment
• Working knowledge of Java application servers including Tomcat, JBoss, and message brokers
• Good organizational and vendor management skills, inclusive of issue tracking, metric reporting, etc
• Demonstrated experience in effective decision-making within a high-pressure 24x7 environment
• Strong research, investigation and evaluation skills
• Ability to identify and clearly communicate problems/support requests in order to influence the prioritization of production defects and/or enhancements
• Excellent verbal and written communication skills
• Results-oriented and highly flexible, able to work with minimal supervision
• Inquisitive self-starter with strong attention to detail