Sr. Linux Administrator | Req#4487
Description
- Linux Platform Administration:
- Manage the complete lifecycle (provisioning, patching, upgrading, decommissioning) of all RHEL servers supporting the enterprise.
- Develop and maintain automation using Ansible, Bash, and/or Python to ensure consistent and rapid deployment of enterprise-wide changes.
- Deploy and maintain servers in clustered environments.
- Performance Tuning and Optimization:
- Proactively monitor and tune the performance of the RHEL environment to support high-throughput, low-latency data processing and ingestion.
- Perform kernel-level tuning (sysctl), I/O optimization, and network performance analysis.
- Troubleshoot and resolve complex performance bottlenecks related to CPU, memory, storage, and networking.
- Operational Support and Troubleshooting:
- Serve as an escalation point for both the Operations Center and other Unix team members.
- Triage and resolve infrastructure issues, providing root cause analysis.
- Work closely with application, storage, and network teams to resolve cross-domain service issues.
- Work with the Backup team to ensure consistent backups of all Linux servers.
- Security and Compliance:
- Implement and maintain system security in accordance with federal standards (NIST, FISMA, and DISA STIGs).
- Manage user access and system entitlements, including SSSD/LDAP/Active Directory integration.
- Troubleshoot and resolve SELinux problems.
- Participate in security audits and provide remediation for findings.
- Participate in an on-call rotation for 24/7/365 operational support.
Requirements
- Must be a U.S. Citizen.
- Must be able to pass a background investigation to obtain and maintain a Public Trust security clearance.
- Bachelor's degree in Computer Science, Information Technology, or a related field (or 7+ additional years of equivalent experience).
- 10+ years of dedicated experience as a Linux/RHEL Engineer or Administrator.
- Strong experience in Linux performance tuning, kernel parameter analysis (sysctl), and troubleshooting with tools like vmstat, iostat, sar, and perf.
- Expert-level scripting with Bash and strong proficiency with Ansible for configuration management and automation.
- In-depth knowledge of Linux storage (LVM, XFS, NFS, CLVM) and networking (TCP/IP, DNS, bonding).
- Expertise across RHEL 7, 8, and 9 environments.
- Active Public Trust clearance. (Titles 13 & 26)
- Red Hat Certified Engineer (RHCE) or Red Hat Certified Architect (RHCA).
- Experience in a large-scale data center or high-performance computing (HPC) environment.
- Experience with Cisco UCS
- Experience with and administration of IBM Storage Scale/GPFS
HDI-certified, woman-owned IT Solutions Provider with strong qualifications and expertise in Agile Software Engineering, Cloud Solutions, Cyber Security and IT Managed Services. With 26+ years of stellar past performance, ActioNet is the premier Trusted Innogrator!
Core Capabilities:
- Advanced and Managed IT Services
- Agile Software Development
- DevSecOps
- Cybersecurity
- Health IT
- C4ISR & SIGINT
- Data Center Engineering & Operations
- Engineering & Installation
Why ActioNet?
At ActioNet, our Passion for Quality is at the heart of everything we do:
- Commitment to Employees: We are committed to making ActioNet a great place to work and continue to invest in our ActioNeters.
- Commitment to Customers: We are committed to our customers by driving and sustaining Service Delivery Excellence.
- Commitment to Community: We are committed to giving back to our community, helping others, and making the world a better place for our next generation.
ActioNet is proud to be named a Top Workplace for the twelfth year in a row (2014 - 2025). We have a 98% customer retention rate. We are passionate about the inspirational missions of our customers, and we entrust our employees and teams to deliver exceptional performance to enable the safety, security, health, and well-being of our nation.
What's in It For You?
As an ActioNeter, you get to be part of an exceptional team and a corporate culture that nurtures mutual success for our customers, employees, and communities. We give you the tools to be successful; all you need to do is bring your best ideas, your energy, and a desire to develop your skills, experience, and career. Are you ready to make a difference?
ActioNet is an equal-opportunity employer and values inclusion at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.
Full-Time Employees are eligible to participate in our ActioNet’s Benefits Program:
- Medical Insurance
- Vision Insurance
- Dental Insurance
- Life and AD&D Insurance
- 401(k) Savings Plan
- Education and Professional Training
- Flexible Spending Accounts (FSA)
- Employee Referral and Merit Recognition Programs
- Employee Assistance and Identity Theft Protection
- Paid Holidays: 11 per year
- Paid Time Off (PTO)
- Disability Insurance
ActioNet is an equal opportunity employer and value inclusion at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.
********Direct Applicants, only. No Agencies, No third-party recruiters, please********
