IT System Administrator

Itau US; Miami (FL); On-site; USD 80,000 - 100,000; Full time

Job summary

Itau US is looking for a Senior IT System Administrator in Miami, Florida. This role is crucial for ensuring the stability and security of our IT infrastructure across cloud and hybrid environments. The ideal candidate will have strong hands-on expertise in managing Windows and Linux servers while also supporting infrastructure improvements.

The position requires a bachelor's degree in IT, alongside 5+ years of system administration experience. Knowledge of Azure and AWS is preferred.

Qualifications

• 5+ years of experience in system administration or IT infrastructure roles.
• Strong hands-on experience with Windows and Linux server administration.
• Experience with Azure, Microsoft 365, and/or AWS.

Responsibilities

• Perform hands-on administration of Windows and Linux servers.
• Deploy, configure, and maintain cloud resources.
• Monitor systems and troubleshoot incidents.

Skills

Windows server administration

Linux server administration

Networking fundamentals

Virtualization (VMware / Hyper-V)

Cloud management (AWS, Azure)

Scripting (PowerShell, Bash)

Cybersecurity principles

Education

Bachelor’s degree in IT or Computer Science

Tools

Active Directory

Microsoft 365

IAM

Job description

About Us

Itaú Unibanco is the largest bank in Latin America, operating in 18 countries and celebrating 100 years of history in 2024. Alongside its scale and stability, Itaú is undergoing an enterprise‑wide transformation, embedding AI, advanced analytics, and digital platforms into core business decisions, from risk and operations to client engagement. As part of this organization, Itaú Private Bank applies these capabilities to wealth management, combining human expertise with intelligent, data‑driven insights to deliver more personalized and forward‑looking solutions for clients.

About The Role

The Senior IT System Administrator is responsible for the stability, security, and day‑to‑day operation of the bank’s IT infrastructure across cloud, on‑premises, and hybrid environments. This role combines deep technical expertise with hands‑on operational work, including routine system administration tasks, while independently handling complex issues and supporting infrastructure improvements.

Duties & Responsibilities

• Perform hands‑on administration of Windows and Linux servers in cloud and hybrid environments.
• Deploy, configure, and maintain cloud resources (compute, storage, networking).
• Monitor systems, networks, and cloud platforms to ensure availability and performance.
• Troubleshoot and resolve infrastructure, network, and security incidents, including routine operational issues.
• Implement and maintain security controls (MFA, firewalls, endpoint protection, patching).
• Administer identity and access management (Active Directory, IAM, GPOs, DNS, DHCP).
• Manage backups, replication, and disaster recovery tasks, including regular validation.
• Support LAN/WAN, VPNs, and hybrid cloud connectivity.
• Apply system updates, patches, and configuration changes following established procedures.
• Automate operational and maintenance tasks using scripting (PowerShell, Bash).
• Document configurations, procedures, and operational changes.
• Participate in infrastructure and security projects.
• Stay current with cybersecurity threats and infrastructure best practices.
• On‑call rotation for critical infrastructure support.
• Occasional after‑hours or weekend work for maintenance or incidents.

Qualifications

• Bachelor’s degree in IT, Computer Science, or equivalent practical experience.
• 5+ years of experience in system administration or IT infrastructure roles.
• Strong hands‑on experience with Windows and Linux server administration, virtualization (VMware / Hyper‑V), and networking fundamentals.
• Experience with Azure, Microsoft 365, and/or AWS.
• Solid understanding of security principles and IT compliance frameworks (ISO, HIPAA, GDPR – preferred).
• Comfortable performing both routine operational tasks and advanced troubleshooting independently.
• English required; Portuguese and/or Spanish preferred.
• Experience performing similar duties in similarly highly regulated industries is preferred.

Certifications (Preferred)

• Azure Administrator (AZ‑104)
• AWS Certification
• CompTIA Security+ and/or Network+
• CCNA or ITIL Foundation