IT Network Administrator

OSI Systems, Inc.; Santos; On-site; BRL 120,000 - 180,000; Full time

Job summary

OSI Systems, Inc. is seeking an experienced Network Infrastructure Engineer to oversee Brazil operations, ensuring availability, security, and scalability of LAN/WAN environments and related systems.

Role requires CCNP-level expertise, 5+ years in networking, and willingness to travel. On-call shifts and relocation to Santos area may be needed to support field locations and customers.

Qualifications

• Bachelor’s degree in CS/Computer Systems/Systems Engineering or equivalent.
• Five+ years in networking, security, VPNs, and enterprise routing.
• CCNP certification required or strongly preferred.
• Willingness to travel and on-call availability.

Responsibilities

• Manage mission-critical network infrastructure across Brazil operations.
• Design, deploy, and optimize LAN/WAN/WLAN and security devices.
• Monitor performance, troubleshoot issues, and ensure SLA-aligned service.
• Collaborate with vendors, IT teams, and customers to resolve incidents.
• Automate deployment and operational tasks to improve efficiency.
• Maintain network diagrams, CMDB entries, and disaster recovery procedures.

Skills

Networking

Security

CCNP certification

VLAN / MPLS

Automation basics

Education

Bachelor’s Degree in Computer Science / Computer Systems / Systems Engineering

Tools

SolarWinds

Prometheus

Grafana

Nagios

Datadog

VMware

Hyper-V

Windows Server

SQL Server

NetApp

EMC

MinIO

Active Directory

Linux

AWS

Azure

Google Cloud

Cisco

Aruba

Fortinet

Routers

Switches

Firewalls

VPN

Job description

Ensure the availability, security, stability, integrity, scalability, and efficient functioning of the data network, server, security, and data transmission infrastructures that support business operations and customer-provisioned services in Brazil. Implement, maintain, monitor, support, troubleshoot, and continuously improve LAN, WAN, wireless, security, server, storage, and related IT infrastructure, including deployments and support of operational platforms such as CertScan when applicable. Identify, communicate, and solve problems in a timely and accurate manner to maximize service availability, meet business objectives and SLAs, and support reliable, scalable, and maintainable network architectures.

Main Activities:

• Manages critical mission network infrastructure for Brazil operations, including screening sites, Data Center, Headquarters, and/or field locations, as applicable.
• Implements, maintains, and supports network and systems environments required to enable customer-provisioned data transmission services and business operations.
• Plans, designs, deploys, configures, monitors, maintains, supports, and optimizes LANs, WANs, WLANs, WWANs, routers, switches, firewalls, wireless access points, VPN concentrators, servers, workstations, telephony equipment, network appliances, software, and communication links.
• Integrates and manages tools that monitor network devices, application and infrastructure performance, availability, alerts, service levels, and security.
• Analyzes network and system performance, identifies bottlenecks, troubleshoots hardware and software issues, and makes the appropriate decisions to repair, restore, and improve services.
• Detects and solves network problems with suppliers, vendors, outsourcers, contractors, internal IT teams, customer IT teams, development teams, and operations teams in a timely and correct manner.
• Handles suppliers and provides timely follow-up to changes in order to minimize disruptions, measure service levels according to contracts and SLAs, and procure network products and services when needed.
• Works with other IT areas in country or outside the country to guarantee availability, performance, reliability, scalability, and maintainability of applications and infrastructure.
• Automates repetitive tasks such as deployments, scaling, infrastructure management, and related operational activities to reduce manual effort and improve efficiency.
• Collaborates with development and operations teams to design and implement systems that are reliable, scalable, maintainable, and aligned with business objectives and SLAs.
• Forecasts future resource needs and ensures that infrastructure can support anticipated traffic, capacity, load, bandwidth, and business demand.
• Builds and maintains documentation, including maintenance records, network diagrams, network mapping, service records, network configuration, change controls, troubleshooting guides, procedures, process documentation, technical specifications, and project plan documents.
• Maintains and manages configurations, ensuring that proper documentation is completed and established processes are followed.
• Practices network asset management using CMDB, including maintenance of network component inventory and related documentation.
• Continually assesses the current state of the network against industry best practices and provides recommendations to improve throughput, reduce failures, strengthen redundancy, and improve processes.
• Develops, implements, maintains, documents, and continually improves policies, procedures, and processes for network administration, utilization, configuration management, monitoring, disaster recovery, and service continuity.
• Designs, documents, performs, monitors, and periodically tests disaster recovery, backup, redundancy, and recovery procedures for local network, wide area network, systems, and security environments.
• Handles tools to maintain a secure network and secure devices, participates in network security solutions, performs network and security audits, and contributes to company certification, compliance, and security efforts.
• Ensures compatibility and interoperability of the company’s computer systems.
• Ensures network connectivity of servers, workstations, telephony equipment, firewalls, and other network appliances, and configures networks to ensure reliable operation and availability for business objectives and processes.
• Maintains network hardware such as routers, switches, firewalls, VPN concentrators, associated software, and peripheral devices.
• Provides assistance to users with computer equipment and escalates issues when necessary.
• Works individually or as part of a team on new and existing equipment, hardware, software upgrades, design, installation, monitoring, maintenance, support, and optimization activities.

Requirements:

• Studies: Bachelor’s Degree in Computer Science, Computer Systems, Systems Engineering, or equivalent. Certifications plus related experience and/or training, or an equivalent combination of education and experience, may be considered according to business needs.
• Experience: Five or more years of progressive experience in networking, network security, VPNs, enterprise routing, layer 3 through layer 7 switching, and network administration. Experience as a certified CCNP Engineer and/or equivalent network engineering experience is required or strongly preferred according to business needs.
• Enterprise network design and implementation: Two or more years preferred.
• Firewall and switch technologies: Two or more years preferred.
• MPLS or VPLS network design: One or more years preferred.
• Schedule Availability: Full-time; on-call availability as required.
• Preferably living in Puerto Dos Santos or availability for on-call shifts is required; therefore, the successful candidate must be available to travel to the site in Puerto de Santos at short notice or be willing to relocate to Puerto de Santos due to traffic conditions in São Paulo.
• Travel: Availability to travel/drive to multiple field locations. Travel may range from approximately one third of the time up to 100%, depending on business and field support needs.
• English Level: Advanced. Preferably Bilingual.
• Microsoft Office: Advanced.
• Technical Knowledge: CCNP certification required or strongly preferred; preferred certifications may include ITIL Foundations v3, CCNA, CCDA, CCDP, CCNP, Cisco, Fortinet, or any industry-standard network certification.
• Network Equipment and Tools: Cisco, Aruba, Fortinet, routers, switches, firewalls, wireless access points, VPN concentrators, SolarWinds or equivalent monitoring systems, sniffers, network analyzers, line toners, statistics/reporting tools, and testing tools/procedures for data circuits.
• Systems and Platforms: Rack, Blade, Hyper-V, VMware (preferable), Windows Server, SQL Server, storage technologies such as NetApp, EMC, HP, MinIO (preferable), Active Directory, Linux/Unix environments, and AWS cloud experience desirable. Knowledge of AWS, Azure, or Google Cloud is increasingly important. In summary, extensive experience with virtualization software.
• Automation and Observability: Familiarity with tools such as Prometheus, Grafana, Nagios, or Datadog. Proficiency in automation or tool-development languages such as Python, Go, or Java may be required for automation and tool development.
• Compliance and Security: Knowledge of network capacity planning, network security principles, network management best practices, data privacy practices, and applicable frameworks or laws, including PCI and SOX.