IT Security Systems Administrator – Telecom

AireSpring

IT Systems Administrator ensuring cybersecurity operations at AireSpring, a leading telecom provider. Managing enterprise security and system administration to protect critical infrastructure.

Posted 6/11/2026full-timeRemote • 🇧🇷 BrazilMid-LevelSeniorWebsite

Tech Stack

Tools & technologies

AWSAzureCloudFirewallsLinuxVMware

About the role

Key responsibilities & impact

Manage enterprise firewalls, including Cisco Meraki, SonicWall, and Fortinet .
Monitor and respond to security alerts using XDR, RMM, and SIEM platforms.
Lead incident response , breach remediation, and root-cause analysis .
Administer Bitdefender Endpoint Protection and similar endpoint security tools.
Secure the Microsoft 365 tenant , including Defender, identity protection, and conditional access policies.
Support SOC 2 and ISO 27002 compliance activities.
Collaborate with internal teams to support telecom-specific applications and integrations .
Monitor system performance, troubleshoot issues, and provide timely resolutions to minimize downtime.
Ensure compliance with telecom industry standards , data protection regulations, and company policies.
Create and maintain documentation for system configurations, processes, and troubleshooting guides .
Perform Windows Server and Linux administration .
Manage user accounts, access permissions, and IT resources across enterprise systems.
Support and maintain virtualization platforms (VMware and Hyper-V).
Perform networking fundamentals and troubleshooting .
Provide technical support to end users, ensuring effective communication and timely resolution of IT-related concerns.
Research and recommend technology upgrades or enhancements to optimize IT operations.
Stay current with the latest IT trends and best practices relevant to the telecom sector.

Requirements

What you’ll need

Good English proficiency, both written and verbal.
Bachelor's degree in Information Technology, Telecommunications, or a related field; or equivalent work experience.
Senior-level experience in systems and security administration.
Strong networking, operating system, and virtualization knowledge.
Experience responding to real-world security incidents.
Proven experience as an IT Systems Administrator, preferably in a telecom-focused organization.
Strong understanding of IT infrastructure, including servers, storage systems, and cloud environments.
Proficiency in managing enterprise software, operating systems (Windows/Linux), and IT tools.
Knowledge of telecom industry applications and requirements is a significant advantage.
Excellent problem-solving and analytical skills with a proactive approach to system management.
Strong interpersonal and communication skills for collaborating with teams and supporting users.
Experience with virtualization platforms (e.g., VMware, Hyper-V) and cloud platforms (e.g., AWS, Azure) is a plus.
Relevant certifications such as Security+, CySA+, CEH, SSCP, ITIL, CompTIA Server+, or Microsoft Certified: Azure Administrator are advantageous.
Ability to multitask and prioritize in a fast-paced, remote working environment.

Benefits

Comp & perks

remote work
reliable internet connection
suitable workspace

ATS Keywords

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Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

firewall managementincident responsebreach remediationroot-cause analysisendpoint securityWindows Server administrationLinux administrationnetworking fundamentalsvirtualizationcloud environments

Soft Skills

problem-solvinganalytical skillsinterpersonal skillscommunication skillscollaborationproactive approachmultitaskingprioritization

Certifications

Security+CySA+CEHSSCPITILCompTIA Server+Microsoft Certified: Azure Administrator