Senior Unix Systems Administrator

Saicon; San Jose (CA); On-site; USD 140,000 - 190,000; Full time

Job summary

Saicon is seeking a Senior Unix LDAP Engineer to support secure LDAP environments in large-scale enterprise infrastructures. The role emphasizes administering LDAP/LDAPS, managing Unix/Linux systems, DNS services, and driving server lifecycle activities including builds, upgrades, patching, migrations, and troubleshooting.

The ideal candidate will have a security-first mindset, strong infrastructure engineering expertise, and experience supporting mission-critical production environments in

Qualifications

• Bachelor's degree or equivalent in a technical field.
• 10+ years of hands-on Unix/Linux administration experience.
• Strong LDAP/LDAPS administration and security experience.
• DNS server administration and troubleshooting expertise.
• Expertise in server builds, upgrades, patching, and migrations.
• Proven troubleshooting and performance tuning skills.
• Knowledge of system security, authentication, and access management.
• Experience in enterprise-scale production environments.

Responsibilities

• Administer LDAP/LDAPS directory services in enterprise environments.
• Configure, secure, and troubleshoot LDAP authentication and directory integrations.
• Manage Unix/Linux server environments including builds, installations, upgrades, and patching.
• Perform server migrations and infrastructure modernization initiatives.
• Administer and support DNS infrastructure and related services.
• Implement system hardening, access controls, and security best practices.
• Monitor system performance, availability, and reliability across infrastructure environments.
• Troubleshoot complex system, authentication, and connectivity issues.
• Develop and maintain technical documentation, operational procedures, and standards.
• Collaborate with infrastructure, security, and application teams on enterprise initiatives.
• Support production incidents, root cause analysis, and remediation efforts.

Skills

LDAP/LDAPS

Unix/Linux Administration

DNS Administration

Server Builds & Patching

System Upgrades & Migration

Infrastructure Security

Troubleshooting

Shell Scripting

Authentication & Access Management

Education

Bachelor's degree in Computer Engineering, Electronics Engineering, Computer Science, or related field

Tools

Red Hat Enterprise Linux (RHEL)

CentOS

Ubuntu

Solaris

Job description

Job Description

We are seeking a Senior Unix LDAP Engineer with 10+ years of experience supporting secure LDAP environments within large-scale enterprise infrastructures. This individual will be responsible for administering and securing LDAP/LDAPS environments, managing Unix/Linux systems, supporting DNS services, and leading server lifecycle activities including builds, upgrades, patching, migrations, and troubleshooting.

The ideal candidate will possess strong infrastructure engineering expertise, a security-first mindset, and experience supporting mission-critical production environments.

Key Responsibilities

• Administer and maintain LDAP/LDAPS directory services in enterprise environments
• Configure, secure, and troubleshoot LDAP authentication and directory integrations
• Manage Unix/Linux server environments including builds, installations, upgrades, and patching
• Perform server migrations and infrastructure modernization initiatives
• Administer and support DNS infrastructure and related services
• Implement system hardening, access controls, and security best practices
• Monitor system performance, availability, and reliability across infrastructure environments
• Troubleshoot complex system, authentication, and connectivity issues
• Develop and maintain technical documentation, operational procedures, and standards
• Collaborate with infrastructure, security, and application teams on enterprise initiatives
• Support production incidents, root cause analysis, and remediation efforts

Required Qualifications

• Bachelor's degree in Computer Engineering, Electronics Engineering, Computer Science, or related field from a reputed institution
• 10+ years of hands-on experience with Unix/Linux system administration
• Strong experience administering LDAP and Secure LDAP (LDAPS) environments
• Experience with DNS server administration and troubleshooting
• Expertise with server builds, installations, upgrades, patching, and migrations
• Strong troubleshooting and performance tuning skills
• Knowledge of system security, authentication, and access management concepts
• Experience working in enterprise-scale production environments

Preferred Qualifications

• Experience with OpenLDAP, 389 Directory Server, or similar LDAP platforms
• Knowledge of Kerberos, PAM, SSO, MFA, or Identity & Access Management solutions
• Experience with Red Hat Enterprise Linux (RHEL), CentOS, Ubuntu, or Solaris
• Scripting experience with Shell, Python, or Perl
• Familiarity with automation and configuration management tools
• Exposure to cloud or hybrid infrastructure environments
• Understanding of PKI, certificates, and encryption technologies

Technical Skills

• LDAP / LDAPS
• Unix / Linux Administration
• DNS Administration
• Server Builds & Patching
• System Upgrades & Migration
• Infrastructure Security
• Troubleshooting & Performance Tuning
• Shell Scripting
• Authentication & Access Management