Senior IT Administrator - Linux/Windows/Mac OS

PURPOSE OF THE POSITION :

We are looking for a Senior IT Administrator to manage and secure our Windows, macOS, and Linux environments, ensure compliance with ISO 27001, and optimize AWS cloud infrastructure.

You will play a key role in IT security, network management, Linux/Windows system administration, employee onboarding/offboarding, and cloud service optimization.

KEY RESPONSIBILITES :

- Draft and implement IT policies for ISO 27001 certification.

- Manage endpoint security:

- Windows Defender for Endpoint (MDR)

- CrowdStrike Falcon (EDR/XDR)

- BitLocker/FileVault encryption

- Conduct security audits, risk assessments, and vulnerability scans.

- Implement IAM, SSO, MFA, Zero Trust Security policies.

- Harden Linux/Windows servers against cyber threats.

2. Windows, macOS & Linux System Administration :

- Administer Windows Server (2016/2019/2022), Active Directory, Group Policy, DNS, DHCP, Hyper-V.

- Manage macOS devices using Apple Business Manager and MDM (Jamf, Intune, or Kandji).

Linux Administration :

- Patch management & security hardening

- User management, ACLs, Sticky Bit

- LVM (Logical Volume Management) & SWAP management

- NFS & Samba for file sharing

- HAProxy for load balancing

- Bind service (DNS configuration)

3. Cloud & Infrastructure Management :

- Administer AWS Cloud Infrastructure:

- EC2, S3, IAM, VPC, CloudWatch, Auto Scaling, Route 53

- Linux-based web and application servers

- Manage firewalls & VPN solutions (Fortinet, SonicWall, Palo Alto, Sophos).

- Optimize network performance, storage, and load balancing.

4. Employee Onboarding & Offboarding :

- Automate user provisioning/deprovisioning with PowerShell, AWS Lambda, or Bash scripting.

- Manage user accounts, email access, and security permissions.

- Maintain IT asset inventory & system access controls.

5. IT Support & Troubleshooting :

- Provide L1/L2 support for Windows, macOS, and Linux issues.

- Troubleshoot network, hardware, and software problems.

- Maintain remote access solutions (VPN, RDP, Citrix).

PREFERRED QUALIFICATIONS :

- Certifications (preferred but not mandatory):

- ISO 27001 Lead Implementer / Lead Auditor

- Linux Foundation Certified System Administrator (LFCS) / RHCSA

- AWS Certified SysOps Administrator

- Microsoft Certified: Azure Administrator Associate / M365 Administrator

- Jamf Certified Tech / Apple Certified Support Professional

- CrowdStrike Falcon Administrator Certification

- Cisco CCNA / Fortinet NSE / Palo Alto PCNSA

- Strong expertise in Windows, macOS, Linux, Office 365, AWS, and security tools.

WHY JOIN US ?

- Be part of a fast-growing SaaS company leading ISO 27001 compliance.

- Competitive salary and career growth opportunities in Linux, AWS, and security.