RDL Jump Host Admin

Job description

​Specialist, IT Infrastructure Req ID: 137495 Remote Position: Hybrid Hiring Manager: Paul Stanners Band: 08 Region: Asia Country: Malaysia State/Province: Bayan Lepas City: Penang Summary We are seeking an experienced, compliance-driven RDL Jump Host Administrator to take ownership of the system administration, security, and access control of our global local jump hosts. Reporting directly to the Lead Network Architect, and working in close alignment with the RDL Network Administrator, you will manage secure access pathways into completely isolated, air-gapped lab networks across multiple HPS Design Centers (including San Jose, Richardson, Thailand, Shanghai, SongShan Lake, Penang, Chennai, and future sites).

The primary objective of this role is to ensure that remote connections terminating from corporate Zscaler ZTNA or customer CyberArk vPAM environments are securely processed, authenticated, and audited. Since our environments strictly prohibit Active Directory or domain joins, you will manage decentralized, local authentication configurations, shell environments, and session boundaries. Crucially, you will implement and maintain the strict compliance frameworks required for Export Controlled VLANs—including interactive terms-of-use banners, mandatory user acceptance gates for shell access, and tamper-proof user-acceptance audit logging.

Core Responsibilities

• Jump Host System Administration & Hardening Server Provisioning & Lifecycle: Deploy, configure, and maintain Linux-based (Rocky Linux, Ubuntu, CentOS) local jump host virtual machines operating on VMware vSphere or Microsoft Hyper-V clusters.

Operating System Hardening

Apply strict CIS (Center for Internet Security) hardening benchmarks on all jump host operating systems. Ensure that no unauthorized software or corporate agents (e.g., CrowdStrike, ServiceNow, ClearPass, Windows Domain utilities) are installed or active on endpoints installed on the VLAN behind the Jump Host.

Service Availability

Ensure the high availability, performance, patch status, and storage capacity of jump servers acting as gateways to the core RDL networks.

• Export Control Compliance & Interactive Gates Export Control Shell Banners: Configure and manage interactive, mandatory user agreement screens (e.g., using custom shell login scripts, Pluggable Authentication Modules (PAM), or SSH ForceCommand) specifically for systems accessing Export Controlled VLANs.

User Acceptance Verification

Ensure that users cannot acquire an interactive shell, run commands, or bypass the landing screen without explicitly reading and accepting the export control and NDA terms.

Tamper-Proof Acceptance Logging

Implement and maintain robust, structured logging systems (using Rsyslog, Journald, or custom secure local logging scripts) that capture: The authenticated user's local/remote identifier. Source IP and connection timestamp. Explicit timestamped confirmation of the user's compliance acceptance.

Log Archival & Integrity

Set up secure, write-only log forwarding or local hashing protocols to ensure audit logs of export-control acceptances cannot be modified or deleted by general users.

• Identity, Access, & Session Management Decentralized Local Authentication: Programmatically or manually provision local Unix user accounts, localized Role-Based Access Control (RBAC), and SSH keys on all jump hosts.

Remote Integration Support

Partner with corporate IT to ensure seamless hand-offs from Zscaler ZTNA (via local Zscaler App Connectors) and CyberArk vPAM sessions terminating on the jump hosts.

Session Controls

Configure strict SSH timeouts, idle session terminations, and multi-factor authentication loops to prevent abandoned active connections.

• Operations, Ticket Resolution & Collaboration Workplace Collaboration: Align daily with the RDL Network Administrator to coordinate VLAN mappings, firewall rule adjustments, and routing protocols necessary for jump host access.

Engineering Support

Serve as a technical point of contact for HPS design engineers having credentialing, shell, or connection issues when entering secure environments.

Incident & Audit Readiness

Assist the Lead Network Architect in pulling audit trails and access reports during compliance reviews, system security audits, or customer security evaluations. Knowledge/Skills/Competencies

Required Technical Skills

Linux Expertise (Expert Level): Mastery of Linux OS administration (Rocky Linux, RHEL, CentOS, Ubuntu) including shell scripting (Bash, Python), security policies, and package management.

Secure Access & Authentication

Comprehensive knowledge of SSH daemon configuration (sshd_config), PAM (Pluggable Authentication Modules) stack configuration, and secure local authentication patterns.

Audit & Log Engineering

Proven experience configuring structured logging systems, syslog routing, Rsyslog, or Journald to create secure, immutable compliance audit trails.

Access Technologies

Familiarity with Zscaler ZTNA (App Connectors), CyberArk vPAM, and Virtual Private Network (VPN) architectures.

Virtualization Basics

Practical experience administering virtual machines, virtual switches, and storage within VMware ESXi / vCenter or Microsoft Hyper-V. Preferred Certifications Red Hat Certified System Administrator (RHCSA) or Engineer (RHCE) CompTIA Linux+ or Linux Foundation Certified SysAdmin (LFCS) CompTIA Security+ or GISF (GIAC Information Security Fundamentals) CyberArk Certified Sentry or Trustee Soft Skills & Working Style Extreme Attention to Detail: Precise, systematic approach to system configuration, security rules, and audit trail maintenance.

High Integrity

Uncompromising commitment to maintaining security barriers, compliance standards, and ethical handling of export-controlled hardware and software.

Excellent Communicator

Strong written and verbal communication skills, necessary for writing technical LLD/SOP documentation, explaining access gates to end-users, and coordinating with the RDL Network Architect. Physical Demands Duties of this position are performed in a normal office environment. Duties may require extended periods of sitting and sustained visual concentration on a computer monitor or on numbers and other detailed data. Repetitive manual movements (e.g., data entry, using a computer mouse, using a calculator, etc.) are frequently required.

Education & Experience

Bachelor’s degree in Network/System Administration, Computer Science, Cybersecurity, or equivalent technical experience. 4+ years of dedicated experience in Linux System Administration, with a strong focus on secure system hardening, user management, and compliance auditing. Overall 14+years of work experience is required. Notes This job description is not intended to be an exhaustive list of all duties and responsibilities of the position.

Employees are held accountable for all duties of the job. Job duties and the % of time identified for any function are subject to change at any time. Celestica is an equal opportunity employer. All qualified applicants will receive consideration for employment and will not be discriminated against on any protected status (including race, religion, national origin, gender, sexual orientation, age, marital status, veteran or disability status or other characteristics protected by law).

At Celestica we are committed to fostering an inclusive, accessible environment, where all employees and customers feel valued, respected and supported. Special arrangements can be made for candidates who need it throughout the hiring process. Please indicate your needs and we will work with you to meet them.