Senior System Administrator

3 days ago

Karachi, Sindh, Pakistan Digital Auxilius Full time 1,200,000 - 2,400,000 per year

Location: Onsite – Karachi
Company: Digital Auxilius
Job Type: Full-Time
Reporting To: Head of IT / Senior Management

About Digital Auxilius

Digital Auxilius is a fast-growing technology and research-driven organization specializing in digital transformation, healthcare technology, and innovative software solutions. We prioritize operational excellence, data security, and a seamless digital work environment for our teams. We are seeking an IT Administrator who can ensure our systems, networks, and IT infrastructure remain secure, efficient, and fully optimized to support our business operations.

Position Overview

The IT Administrator will be responsible for managing and maintaining the company's IT systems, networks, hardware, and software. This role demands strong technical troubleshooting abilities, a proactive mindset, and the capability to support both office-based and remote teams. The ideal candidate is dependable, solution-oriented, and committed to maintaining a secure and scalable IT environment.

Key Responsibilities

Network

  • Manage Fortinet firewalls: policy control, DPI, IPS, web/content filtering, and SD-WAN routing.
  • Configure and maintain Cisco Catalyst switching and Cisco WLC controllers.
  • Operate multi-ISP SD-WAN, failover routing, and IPSec tunnels.
  • Implement 802.1X authentication with NPS/RADIUS and dynamic VLAN assignment.
  • Maintain captive portal environments and secure Wi-Fi (2.4/5 GHz).
  • Monitor bandwidth, latency, and interface performance through Zabbix.
  • Diagnose routing, VLAN, or authentication faults at packet level.

Servers & Systems

  • Maintain Windows Server 2022–2025 (AD, DNS, IIS, DHCP, NPS).
  • Manage Dell PowerEdge infrastructure, virtualization, and storage.
  • Maintain Ubuntu servers, Nginx, and PHP web applications.
  • Manage SSL lifecycle (Let's Encrypt, internal CA, Cloudflare tunnels).
  • Automate routine admin and deployment tasks with scripting.

Security & Compliance

  • Enforce ISO 27001 controls: access, patching, asset tracking, and incident handling.
  • Maintain logs, audit evidence, and baseline documentation.
  • Manage endpoint security, certificate policies, and port restrictions.
  • Operate Fortinet IPS and DPI modules for active threat detection and filtering.
  • Lead incident response, containment, and root cause analysis.

Backup & Recovery

  • Manage Veeam backups and replication.
  • Perform regular integrity verification and restore testing.
  • Maintain full recovery documentation for all critical systems.

Operations

  • Lead IT staff: assign work, verify completion, maintain procedure docs.
  • Operate osTicket or equivalent helpdesk platform with defined SLAs.
  • Act as L3 escalation for network, system, and security incidents.
  • Track vendor SLAs, coordinate with ISPs and service providers.
  • Maintain hardware inventory, license records, and configuration maps.
Requirements
  • 5–7 years in enterprise systems and network administration.
  • Strong command of Fortinet (firewall, DPI, IPS, filtering, SD-WAN) and Cisco environments.
  • Proficiency in Windows Server, Linux, and Veeam backup operations.
  • Proven experience maintaining ISO 27001 compliance.
  • Deep troubleshooting ability across network, authentication, and virtualization layers.
  • Scripting skills (PowerShell, Bash, or Python).
  • Availability for off-hours maintenance and incident response.


Why Join Digital Auxilius?

  • Opportunity to work in an innovative and fast-scaling tech environment.

  • Career growth and learning in digital transformation and IT automation.

  • Collaborative culture with a focus on innovation and excellence.

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