Jump Host Administrator

Job title RDL Jump Host Administrator

Location

Toronto ON Contract - Hybrid $50 - $60/hr depending on experience We are seeking an experienced RDL Jump Host Administrator to manage the administration security hardening and access controls of Linux-based jump hosts supporting isolated and air-gapped Research & Development environments. This is a highly security-focused role requiring strong experience across Linux administration networking access management virtualization and compliance .

Key Responsibilities

Administer configure patch monitor and maintain Linux-based jump hosts. Harden Linux systems in accordance with CIS benchmarks and security policies . Manage RHEL Rocky Linux CentOS and/or Ubuntu environments. Configure and maintain SSH PAM RBAC local authentication and SSH key management . Manage local Unix/Linux accounts and access controls in environments without Active Directory or domain joins. Support secure remote access through Zscaler ZTNA and CyberArk vPAM . Configure SSH session controls authentication policies idle timeouts and session termination. Implement secure audit logging and compliance controls using technologies such as Rsyslog and Journald . Support mandatory access NDA and export-control acceptance mechanisms. Troubleshoot Linux authentication SSH networking and connectivity issues. Collaborate with network and security teams on VLANs firewalls routing VPNs and secure access pathways . Administer virtual machines within VMware vSphere/ESXi/vCenter and/or Microsoft Hyper-V environments. Maintain technical documentation SOPs access records and audit evidence.

Required Qualifications

4+ years of Linux system administration experience preferably in secure hardened regulated or compliance-driven environments. Advanced Linux administration experience with RHEL Rocky Linux CentOS and/or Ubuntu . Strong knowledge of SSH/sshd PAM RBAC local authentication Linux user management and SSH keys . Strong Bash and/or Python scripting skills. Experience with Linux security hardening and compliance auditing . Experience with VMware ESXi/vCenter/vSphere and/or Microsoft Hyper-V . Advanced networking knowledge including VPNs routing firewalls VLANs and connectivity troubleshooting . Experience with secure logging and audit-trail implementation. Strong troubleshooting documentation and communication skills.

Nice-to-Have

Zscaler ZTNA / App Connectors CyberArk vPAM CIS Linux hardening Rsyslog / Journald Secure or write-only log forwarding Air-gapped or isolated environments Export-control or regulatory compliance environments RHCSA / RHCE CompTIA Linux+ / Security+ LFCS CyberArk certifications

What We're Looking For

The ideal candidate

is a hands-on Linux professional who understands that security and access control are as important as system availability . You should be comfortable working in highly controlled environments troubleshooting complex Linux and networking issues and maintaining strict compliance and audit requirements. If you have strong experience in Linux administration system hardening SSH/PAM networking VMware CyberArk Zscaler or secure infrastructure we'd like to hear from you. Note AI-enabled tools may be used to sort applications based on job-related criteria. All AI generated results are vetted by our team and the decision of which candidates move forward is always made by a human.