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 today’s 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 it’s 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 don’t feel stuck in place. With cross-platform certifications and decades of experience, our technology experts have become an extension of your team so you’re continuously innovating – doing more with less while remaining secure. And that’s just the beginning .

We are seeking a Linux L3 Engineer to join Linux 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

Resolve high-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

Develop Ansible playbooks, shell scripts, and automation to 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 within ServiceNow/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+ years of production Linux/Unix administration and support experience

Deep knowledge of RHEL, CentOS, Ubuntu (including LTS versions and lifecycle management )

Advanced troubleshooting skills: kernel, networking, storage, performance tuning

Experience with patching, security updates, and vulnerability remediation

Strong shell scripting ( Bash ) and Ansible automation experience

Proficiency with systemd, RPM/APT package management, and kernel modules

Hands-on experience with SSH, sudo, LDAP/Active Directory authentication

Solid understanding of Linux security (SELinux, AppArmor, firewalls, file permissions)

Cloud & Infrastructure

Experience with AWS EC2 , GCP and Azure VMs in production environments

Understanding of managed services and infrastructure as a service (IaaS)

Experience with DNS, routing, load balancing concepts

Monitoring & Logging

Experience with Datadog, Azure Monitor, Prometheus, or similar monitoring platforms

Ability to configure alerts, dashboards, and log aggregation

Understanding of metrics, 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 in 24/7 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.