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About the Role
We are seeking a proactive and detail-oriented RDL Network Administrator to manage the day-to-day operations and administration of our global Research and Development Lab (RDL) networks. This role focuses on the run-and-maintain aspects of isolated, air-gapped networks, requiring a hands-on, highly disciplined administrator who excels at executing manual and semi-automated workflows securely and consistently.
Responsibilities
- Monitor the health, performance, and uptime of RDL hardware, including Checkpoint Firewalls, SilverPeak SD-WAN appliances, and Cisco and Celestica switches.
- Implement localized VLAN adjustments, IP address allocations, and switch port provisioning to isolate multi-tenant projects.
- Execute hardware diagnostics, physical cabling checks, and firmware/OS updates.
- Provision local user accounts and role-based permissions on Linux-based jump hosts.
- Manage access credentials in a decentralized non-Active Directory environment.
- Administer daily customer connections using CyberArk vPAM and internal user access using Zscaler ZTNA/Zscaler App Connectors.
- Review, audit, and clean up inactive user sessions and local accounts weekly.
- Execute and monitor the secure transfer of "transfer bundles" containing OS packages, drivers, and software libraries across the air gap.
- Ensure local web repositories are operational, indexed, and accessible to local lab systems.
- Verify the cryptographic hashes (SHA-256 checksums) of all data packages.
- Act as the primary technical point of contact for network troubleshooting, IP conflicts, or new package requests.
- Process, update, and resolve secure lab support tickets in accordance with established Service Level Agreements (SLAs).
- Identify complex network issues or design deviation requests and escalate them to the Lead Network Architect.
- Conduct regular logical audits of systems to ensure strictly banned corporate agents are not installed.
- Maintain an inventory of all HPS-owned assets within the RDL physical rooms.
Requirements
- Practical experience configuring and troubleshooting Cisco switches (Catalyst/Nexus).
- Experience administering Checkpoint Firewalls (defining security rules, NAT, and logs).
- Mid-to-senior level competency in Linux (Rocky, CentOS, Ubuntu)—specifically user management, bash scripting, basic routing, and running local web servers (Apache/Nginx).
- Experience working with remote access tools such as Zscaler ZTNA / App Connectors.
- Experience with Privilege Access Management solutions (specifically CyberArk).
- Solid experience administering VMs, clusters, and virtual switches within VMware vSphere or Microsoft Hyper-V environments.
- Working knowledge of secure file transfer protocols (SFTP, SCP, rsync).
- Working knowledge of security scanning methodologies.
- Ability to strictly adhere to Standard Operating Procedures (SOPs).
- Strong written and verbal communication skills.
- Capable of balancing ticket requests from multiple global labs concurrently while maintaining accurate records.
Skills
- Checkpoint Firewalls
- SilverPeak SD-WAN
- Cisco Catalyst 9400/9200 switches
- Celestica DS2000/ES1500 switches
- Linux System Administration
- Bash scripting
- Apache
- Nginx
- Zscaler ZTNA
- Zscaler App Connectors
- CyberArk vPAM
- VMware vSphere
- Microsoft Hyper-V
- SFTP
- SCP
- rsync
Location
- Toronto, Ontario, Canada
Work Type
- Onsite
Experience Level
- 10+ years of experience in network administration or system administration
- Mid-to-senior level competency in Linux
Education Level
- Bachelor’s degree in Network Administration, Information Technology, Computer Science, or equivalent hands-on experience.
Salary/Compensations
- 109,000.00 - 173,000.00 (CAD)
Benefits
- Comprehensive benefits package
About the Company
- Celestica is an Equal Opportunity Employer.
Equal Opportunity
- All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, pregnancy, genetic information, disability, status as a protected veteran, or any other protected category under applicable federal, state, and local laws.
- Retaliation against a person who files a charge of discrimination, participates in a discrimination proceeding, or otherwise opposes an unlawful employment practice will not be tolerated.
- All information will be kept confidential according to EEO guidelines.
- Celestica is an E-Verify employer.