Senior Linux Systems Engineer

About Ensono

Ensono is an expert technology adviser and managed service provider. As a relentless ally we accelerate clients digital transformation to achieve business outcomes that stand to last. Our dedicated team helps organizations optimize todays systems across any hybrid environment with services such as consulting mainframe and application modernization public cloud migration and cloud-native development. With certified experts in AWS Azure and Google Cloud and recognized as Microsoft Datacenter Transformation Partner of the Year Ensono has over 3500 associates globally and is headquartered in greater Chicago.

We care about your success offering comprehensive strategic and managed services for mission-critical applications. Our Advisory and Consulting services can help upfront with an application strategy or find the right places for your applications whether its public multi or hybrid cloud or mainframe. And because we span across all mission-critical platforms we can meet you wherever you are in your digital transformation journey with 24/7 support when you need it. We are your relentless ally flexing with you when challenges emerge so you dont feel stuck in place. With cross-platform certifications and decades of experience our technology experts have become an extension of your team so youre continuously innovating doing more with less while remaining secure. And thats just the beginning.

We are seeking a Linux L3 Engineer to joinLinux Operations team. This is a hands-on technical leadership role responsible for managing supporting and optimizing Linux servers in production environments across hosted cloud (AWS/Azure) and remote infrastructure settings. You will drive operational excellence incident resolution automation and continuous improvement for critical business systems.

Key Responsibilities

Incident & Problem Management

• Resolvehigh-priority incidents and major incidents (MIs)with end-to-end ownership and minimal escalation
• Perform advanced root-cause analysis and implement permanent sustainable fixes
• Lead critical incident response stabilization and recovery efforts under pressure
• Provide clear technical direction and minimize business impact during outages

Ownership & Accountability

• Take end-to-end ownership of service requests incidents and operational tasks
• Ensure proper validation documentation and closure of all work items
• Track MTTR (Mean Time to Resolution) and drive continuous improvement
• Maintain high availability and compliance standards

Process Excellence & SOP Development

• Create review and maintain Standard Operating Procedures (SOPs) for recurring operational tasks
• Identify and document gaps in procedures and driving standardization across teams
• Support audit and compliance requirements through documented processes
• Contribute to operational runbooks and disaster recovery procedures

Automation & Infrastructure as Code

• DevelopAnsible playbooks shell scripts and automationto reduce manual effort
• Support infrastructure-as-code initiatives and configuration management
• Identify repetitive tasks and drive automation to improve reliability and efficiency
• Support deployment and orchestration initiatives (Docker Kubernetes orchestration tools)

Change & Risk Management

• Execute changes withinServiceNow/change management frameworks
• Perform impact analysis and risk assessment for infrastructure changes
• Coordinate with stakeholders during maintenance windows and service outages
• Validate blackout configurations and alert suppression during changes

Mentorship & Team Leadership

• Act as a technical reference point and mentor for junior engineers
• Guide team members during complex troubleshooting and escalations
• Share knowledge through documentation training and collaborative problem-solving
• Contribute to team capability development and cross-training

Client & Stakeholder Management

• Communicate effectively with internal teams and external clients
• Provide clear updates on incident status and resolution timelines
• Build trust through reliability transparency and technical credibility
• Support SLA compliance and service level agreements

Required Qualifications

Technical Skills

• 8 yearsof production Linux/Unix administration and support experience
• Deep knowledge ofRHEL CentOS Ubuntu (including LTS versions and lifecycle management)
• Advanced troubleshooting skills: kernel networking storage performance tuning
• Experience withpatching security updates and vulnerability remediation
• Strong shell scripting (Bash) andAnsibleautomation experience
• Proficiency withsystemd RPM/APT package management and kernel modules
• Hands-on experience withSSH sudo LDAP/Active Directoryauthentication
• Solid understanding ofLinux security(SELinux AppArmor firewalls file permissions)

Cloud & Infrastructure

• Experience withAWS EC2 GCP and Azure VMsin production environments
• Understanding ofmanaged servicesandinfrastructure as a service (IaaS)
• Experience withDNS routing load balancingconcepts

Monitoring & Logging

• Experience withDatadog Azure Monitor Prometheus or similarmonitoring platforms
• Ability to configure alerts dashboards and log aggregation
• Understanding ofmetrics logs traces (observability fundamentals)

Operational Skills

• Strong incident response and problem-solving under pressure
• Change management and risk assessment experience
• Documentation and SOP writing skills
• Ability to work in24/7 on-call rotations(if required)

Soft Skills

• Excellent communication and technical documentation abilities
• Strong time management and prioritization in multi-tasking environment
• Team player with mentoring mindset
• Detail-oriented with focus on quality and compliance

Shift Timings: 24*7 rotational shift and oncall support

We are an equal opportunity employer. All qualified applicants will be considered for employment without regard to caste colour creed religion gender gender identity sexual orientation age disability HIV status or any other status protected by law. Candidates with disabilities who require accommodations during the recruitment process are encouraged to contact our Talent Acquisition team to place a request.