Linux Systems Engineer

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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. We are seeking a Linux Systems Engineer to support our Data Center Operations team. Although this is a primarily remote position, candidates located near Orlando, FL are highly preferred.

This role will have 'full-stack' authority and responsibility across all aspects of the company's Data Center and Customer-Premise deployed computer equipment, to include hardware, Host OS, hypervisor, Guest OS, Orchestration, Applications and monitoring.

• This role is responsible for supporting physical and virtual computing environments, in a Linux-based data center environment
• Red Hat/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

• The ideal candidate has at least 5 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, Dev Ops, 24x7x365 operations, HP Proliant, HPE Synergy, Dell, Super Micro
• 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
• Experience with Open Nebula virtualization management helpful
• Experience with Cacti and Nagios 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 Pace Maker)
• 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

• ActiveMQ
• Errigal
• Mobile carriers/Messaging
• Deep Packet Inspection products
• Pace Maker, DRBD.
• ProxySQL
• Cisco/Fortigate/Mikrotik…