Senior System Administrator (PROJ-4600)
Job Description
Remote is seeking an experienced System Administrator to support the delivery and ongoing operation of a secure, high-availability platform across Linux and AWS environments. The role focuses on system administration, security implementation, automation and performance monitoring to ensure reliability, resilience and compliance. Candidates should have strong expertise in Red Hat Linux, AWS services and automation tools such as Ansible, with desirable experience in Apache NiFi, implementing Essential Eight security controls and administering databases such as MySQL or DynamoDB. (LH-05241)
Role Description
Key duties and responsibilities
- Administer, maintain, and monitor Linux-based systems, including patching, configuration, and performance tuning
- Manage AWS infrastructure (e.g. EC2, S3, Lambdas, backups, workloads, security controls) to ensure availability and security
- Implement and maintain security controls in line with organisational policies
- Assist in the continuous improvement process by developing and enhancing procedures
- Document technical processes in accordance with organisational requirements and promote bidirectional knowledge transfer within a team environment
Technical Skills
Red Hat Enterprise Linux (administration, patching, performance tuning)
AWS Services:
- EC2
- Lambda
- S3
- Backup services
Automation & Orchestration Tools:
- Ansible
- Semaphore
Monitoring & Logging Tools:
- Grafana
- ELK Stack (Elasticsearch, Logstash, Kibana)
Essential criteria
- Extensive experience administering Red Hat Enterprise Linux systems including patching, performance tuning, and troubleshooting in production environments.
- Extensive experience deploying, configuring, and maintaining applications on AWS, including EC2, Lambda, S3, and backup services, with a focus on reliability and security.
- Hands-on experience with automation and orchestration tools (specifically Ansible and Semaphore) for system provisioning, configuration management, and deployment workflows.
- Extensive experience in monitoring and logging, using tools such as Grafana and the ELK stack, to monitor system health and support incident response
Desirable criteria
- Experience administering and supporting Apache NiFi clusters, including configuration and troubleshooting of data flows.
- Experience with operating in secure government environments, including compliance with security policies and change management processes.
- Practical experience implementing and maintaining Essential Eight security controls, particularly in Linux and AWS environments.
- Familiarity with administration and tunning of databases like MYSQL and Dynamo DB.