System, Network & Data Security Administrator

Sharaan Infosystems; Bengaluru; On-site; INR 1,500,000 - 2,100,000; Full time

Job summary

Sharaan Infosystems is seeking an Experienced System, Network & Data Security Administrator to manage IT infrastructure across on-premises and cloud environments. You will handle server administration, network management, cloud infrastructure, cybersecurity, disaster recovery, backup management, and high availability for business-critical systems.

The ideal candidate should have strong expertise in Windows and Linux server administration, networking, cloud platforms, virtualization, information

Qualifications

• 10+ years hands-on experience in IT infrastructure.
• Experience in Windows and Linux server administration, virtualization, and IAM.
• Ability to plan, implement, and document infrastructure projects with stakeholders.

Responsibilities

• Plan, install, configure, and maintain Windows and Linux servers.
• Manage databases, web servers, and middleware across on-prem and cloud.
• Administer AWS, Azure, and GCP cloud resources and connectivity.
• Design HA, backup, DR strategies and ensure security controls.
• Monitor performance, capacity, and incident response.
• Coordinate with development and client teams for deployments.

Skills

Analytical skills

Troubleshooting

Infrastructure planning

Documentation

Stakeholder coordination

Independent work

Communication

Education

BE / B.Tech / M.Tech (CSE/IT)

BCA / MCA

Diploma in CSE/IT with relevant experience

Certifications (non-technical with relevant experience)

Tools

Active Directory

DNS

DHCP

IIS

Apache

Nginx

MS SQL Server

MySQL

PostgreSQL

VMware/Hyper-V

PowerShell

Bash

Python

AWS

Azure

GCP

SIEM

IDS/IPS

Firewall administration

Job description

We are looking for an experienced System, Network & Data Security Administrator to manage and secure the organization's IT infrastructure across on-premises and cloud environments. The role is responsible for server administration, network management, cloud infrastructure, cybersecurity, disaster recovery, backup management, and ensuring high availability of business-critical systems.

The ideal candidate should possess strong expertise in Windows and Linux server administration, networking, cloud platforms, virtualization, information security, and infrastructure planning.

Key Responsibilities

1. Server Administration

• Plan, install, configure, administer, maintain, and optimize servers running Windows, Linux, and other operating systems.
• Install, configure, and manage databases, web servers, application servers, and middleware on physical, virtual, and cloud environments.
• Manage servers hosted on cloud platforms including AWS, Microsoft Azure, and Google Cloud Platform (GCP).
• Coordinate with Development, Implementation, Project, and Client teams for server sizing, capacity planning, procurement, deployment, and commissioning.
• Design and maintain High Availability (HA), Failover, and Failback solutions for business-critical servers.
• Plan, implement, monitor, and periodically test backup and disaster recovery strategies.
• Perform operating system patches, firmware updates, software upgrades, and security updates with minimal downtime.
• Monitor server performance, storage utilization, logs, and hardware health.
• Ensure optimum performance, availability, and security of all production systems.

2. Network Administration

• Design, install, configure, administer, and maintain Local Area Networks (LAN), Wide Area Networks (WAN), Wireless Networks, and Virtual Private Networks (VPN).
• Configure and manage routers, switches, firewalls, gateways, load balancers, and other network devices.
• Monitor network performance and proactively troubleshoot connectivity, routing, switching, DNS, DHCP, and bandwidth-related issues.
• Design and maintain network redundancy, failover, and disaster recovery mechanisms.
• Ensure network availability with a target uptime of 99.99%.
• Perform capacity planning and continuous performance optimization of enterprise networks.
• Maintain documentation for network topology, IP addressing, and infrastructure changes.

3. Cloud Infrastructure Administration

• Plan, deploy, configure, and administer cloud infrastructure on AWS, Microsoft Azure, and Google Cloud Platform.
• Manage cloud Virtual Machines (VMs), VPS, Dedicated Servers, Virtual Networks, Security Groups, Load Balancers, Storage Services, and Identity & Access Management (IAM).
• Configure and maintain secure connectivity between on-premises infrastructure and cloud environments.
• Administer leased lines, broadband connectivity, VPN tunnels, and multi-site network connectivity.
• Ensure high availability, scalability, and business continuity of cloud-hosted services.
• Monitor cloud infrastructure performance and optimize resource utilization and operational costs.

4. Information & Data Security Administration

• Design, implement, and administer enterprise security controls across servers, networks, cloud infrastructure, and endpoints.
• Protect cloud and internet-facing on-premises servers against unauthorized access, malware, ransomware, hacking attempts, Distributed Denial of Service (DDoS) attacks, and data breaches.
• Configure and manage firewalls, Intrusion Detection/Prevention Systems (IDS/IPS), Endpoint Detection & Response (EDR), antivirus, anti-malware, and security monitoring tools.
• Perform vulnerability assessments, security audits, patch management, and system hardening.
• Implement Identity & Access Management (IAM), Multi-Factor Authentication (MFA), role-based access controls, and least-privilege principles.
• Monitor security logs and investigate security incidents.
• Develop and maintain backup, disaster recovery, ransomware recovery, and cybersecurity incident response procedures.
• Ensure compliance with organizational information security policies and industry best practices.

5. Monitoring & Infrastructure Management

• Continuously monitor servers, networks, cloud infrastructure, storage, and security systems.
• Proactively identify risks and implement corrective and preventive actions.
• Maintain infrastructure documentation, standard operating procedures (SOPs), asset inventory, and configuration records.
• Coordinate with vendors, ISPs, OEMs, and cloud service providers for issue resolution and infrastructure support.
• Participate in infrastructure planning, technology upgrades, and capacity expansion initiatives.

Required Technical Skills

• Windows Server Administration
• Linux Server Administration
• Active Directory & Group Policy
• DNS, DHCP, IIS, Apache, Nginx
• Microsoft SQL Server, MySQL, PostgreSQL (preferred)
• VMware / Hyper-V Virtualization
• TCP/IP Networking
• Routing & Switching
• VLAN, VPN, NAT, Firewall Administration
• AWS Cloud Services
• Microsoft Azure
• Google Cloud Platform (GCP)
• Backup & Disaster Recovery Solutions
• Server Hardening & Security
• Endpoint Security & Antivirus Management
• IDS/IPS, SIEM, and Security Monitoring
• Infrastructure Performance Monitoring
• Scripting (PowerShell, Bash, or Python) is desirable.

Required Competencies

• Strong analytical and troubleshooting skills.
• Excellent problem-solving ability.
• Infrastructure planning and implementation expertise.
• Strong documentation and reporting skills.
• Ability to manage multiple critical systems simultaneously.
• Good communication and stakeholder coordination skills.
• Ability to work independently and handle mission-critical infrastructure.

Preferred Certifications

Preference will be given to candidates holding one or more of the following certifications:

• AWS Certified Solutions Architect / SysOps Administrator
• Microsoft Certified: Azure Administrator Associate
• Google Cloud Associate Cloud Engineer
• Cisco Certified Network Associate (CCNA)
• Cisco Certified Network Professional (CCNP)
• Red Hat Certified System Administrator (RHCSA)
• Red Hat Certified Engineer (RHCE)
• Microsoft Windows Server Certifications
• VMware Certified Professional (VCP)
• CompTIA Security+
• Certified Information Systems Security Professional (CISSP) (Preferred)
• Certified Ethical Hacker (CEH) (Preferred)

Educational Qualifications

• BE / B.Tech / M.Tech (Computer Science, Information Technology, Electronics, or related disciplines), or
• BCA / MCA, or
• Diploma in Computer Engineering / Information Technology with relevant experience, or
• Non-technical graduates possessing relevant technical certifications and significant hands-on experience.

Experience

• Minimum 10 years of hands-on experience in:
  • Server Administration
  • Network Administration
  • Cloud Infrastructure Management
  • Information & Data Security
  • Backup & Disaster Recovery
  • Enterprise IT Infrastructure Management