System Engineer

Job Title: L3 Systems Engineer Infrastructure & Cloud (Windows/ Linux/ M365/ Network/ Security)

Role Overview

We are seeking a highly skilled L3 Systems Engineer responsible for design, troubleshooting, and optimization of enterprise IT infrastructure across Windows, Linux, Microsoft 365, and Network/Security domains. The role requires deep technical expertise, incident resolution ownership, and proactive system improvement in a 24/7 enterprise environment.

Location: Technopark Phase 1, Trivandrum

Key Responsibilities

Infrastructure & Systems (Windows/Linux)

• Manage and troubleshoot: Windows Server (20162025), Active Directory, GPO; Linux servers (RHEL, Ubuntu, CentOS)
• Handle: AD replication, DNS/DHCP, OU design; Patch management, OS hardening
• Lead: Server build/migrations, upgrades, and DR planning

Microsoft 365 / Entra ID

• Administer: Microsoft 365 (Exchange Online, Teams, SharePoint, OneDrive); Microsoft Entra ID (Azure AD)
• Manage: Identity lifecycle (JML); Conditional Access, MFA, PIM
• Troubleshoot: Mail flow, hybrid setup, federation issues

Networking (L2/L3)

• Configure & troubleshoot: Switching (VLANs, STP, trunking); Routing (Static, OSPF, BGP basics)
• Manage: LAN/WAN connectivity; Network performance and latency issues
• Work with: MPLS, VPNs, Internet breakout

Security & Firewalls

• Configure & manage: Firewall policies (Fortinet, Palo Alto, Cisco ASA, etc.)
• Handle: NAT, ACLs, VPN tunnels (Site-to-Site, SSL VPN)
• Support: Security audits, VA/PT remediation; Log analysis and incident response

Incident & Problem Management

• Act as L3 escalation point
• Perform: Root Cause Analysis (RCA); Problem management
• Ensure: SLA adherence; Minimal downtime

Automation & Optimization

• Develop scripts using: PowerShell, Bash
• Automate: User provisioning; Monitoring & alerting
• Optimize: System performance and cost

Documentation & Compliance

• Maintain: Architecture diagrams; SOPs, runbooks
• Support: ISO 27001, SOC 2, audit readiness
• Ensure: Change management (CAB process)

Technical Skills Required

• Core Skills
• Windows Server + Active Directory (Expert)
• Linux Administration (IntermediateAdvanced)
• Microsoft 365 + Entra ID (Expert)
• Networking fundamentals (CCNA level minimum)
• Firewall & security concepts

Tools & Technologies

• Azure / AWS (basic to intermediate)
• Monitoring tools (Zabbix, SolarWinds, PRTG, etc.)
• Backup tools (Veeam, Acronis)
• SIEM (optional Sentinel, Splunk)

Scripting

• PowerShell (mandatory)
• Bash (preferred)

Qualifications

Bachelors degree in IT / Computer Science or equivalent

Certifications (preferred):

• Microsoft (AZ-104, MS-102)
• Cisco (CCNA/CCNP)
• Linux (RHCSA/RHCE)
• Security (Fortinet NSE, Palo Alto)

Experience

Overall 15+ years of experience out of which 510 years experience in enterprise IT infrastructure/ Systems

Experience in:

• Large environments (500+ users)
• Hybrid cloud setups
• 24/7 support operations

Key Competencies

• Strong troubleshooting & analytical skills
• Ability to handle critical incidents under pressure
• Cross-domain knowledge (Infra + Cloud + Network + Security)
• Excellent communication & stakeholder management

Work Environment

• 24/7 support (shift/on-call rotation)
• Exposure to enterprise clients (US/Global)
• Participation in CAB / change governance