Systems Administrator

ManhattanLife Insurance & Annuity Company•Houston, TX

69d•Onsite

About The Position

ManhattanLife continues to grow our business and our technology team. We currently have an opportunity for an experienced Systems Administrator at our Houston, Texas headquarters. This position is responsible for the administration, security, reliability, and optimization of ManhattanLife's hybrid infrastructure, with a strong focus on enterprise Linux, Microsoft Azure, Microsoft 365, Windows Server, virtualization, and hybrid identity services. The Systems Administrator will help maintain secure and highly available systems, support infrastructure projects, improve operational processes, and provide escalation support across server, cloud, virtualization, identity, and endpoint management platforms. Areas of responsibility include enterprise Linux systems, Microsoft cloud services, Microsoft 365, hybrid directory services, virtualization, network and security infrastructure, collaboration platforms, compliance tooling, multi-factor authentication, remote monitoring and management, ticketing, documentation, and other enterprise IT platforms.

Requirements

High School Graduate or equivalent (GED).
At least 7 years of systems administration, infrastructure, or managed services experience.
At least 5 years supporting Microsoft enterprise technologies, including Windows Server, directory services, DNS, DHCP, Microsoft 365, and hybrid identity environments.
At least 2-3 years of hands-on Microsoft Azure administration experience.
Hands-on experience administering enterprise Linux systems.
Experience with enterprise virtualization platforms.
Experience with ticketing, RMM, and documentation platforms.
Strong troubleshooting experience across server, cloud, identity, virtualization, and networking technologies.
Strong technical troubleshooting, analytical, and root-cause analysis skills.
Strong working knowledge of Linux, Microsoft, Azure, virtualization, identity, and enterprise infrastructure technologies.
Ability to manage competing priorities in a fast-paced environment.
Detail-oriented approach to documentation, change control, and operational execution.
Excellent communication and collaboration skills.
Mature, responsible, and dependable team player.
Strong customer service mindset.
Ability to take initiative, own technical issues, and drive projects to completion.
Ability to work effectively with technical teams, business users, vendors, and leadership.

Nice To Haves

Enterprise Linux certification or equivalent hands-on experience.
Microsoft Azure certifications such as administrator or security-focused certifications.
Microsoft 365 security, compliance, governance, and cloud identity experience.
Experience supporting hybrid directory and cloud identity environments.
Experience with MFA and conditional access policies.
Experience with collaboration and file-sharing platform administration.
Experience with enterprise networking and security platforms.
Experience with backup and replication solutions.
Experience with PowerShell, cloud command-line tools, Bash, or other scripting/automation tools.
Experience supporting HIPAA, PCI, audit, or regulated enterprise environments.
Experience supporting mergers, acquisitions, system integrations, or infrastructure migrations.
Microsoft Enterprise Linux administration
Microsoft Azure and Microsoft 365 administration
Hybrid identity and directory services
Virtualization platforms
Multi-factor authentication and conditional access
Security, compliance, and information governance platforms
Collaboration and file-sharing platforms
IT service management, RMM, and documentation platforms
Enterprise networking, security, and backup platforms
PowerShell, cloud CLI, and Bash scripting
Regulated enterprise environments such as HIPAA and PCI

Responsibilities

Administer and support enterprise Linux systems, including configuration, patching, troubleshooting, access management, performance monitoring, and service availability.
Support additional Linux distributions and enterprise Linux platforms as needed.
Administer current Windows Server environments.
Support migration and integration of acquired legacy systems.
Manage directory services, Group Policy, DNS, DHCP, file permissions, authentication, SSO, and federation-related services.
Support hybrid identity environments integrating on-premises directory services with cloud identity platforms.
Perform server hardening, vulnerability remediation, OS patching, and lifecycle management.
Maintain accurate documentation for server configurations, operational procedures, standards, and support processes.
Administer Microsoft Azure services, including virtual machines, networking, security controls, backup, monitoring, storage, access control, and related infrastructure services.
Support cloud security and governance capabilities, including conditional access, security posture management, role-based access control, logging, and monitoring.
Support hybrid infrastructure integrations between on-premises systems, Azure, and Microsoft 365.
Automate cloud and administrative tasks using scripting and command-line tools.
Administer Microsoft 365 services, including email, collaboration, file sharing, communication tools, and related security/compliance features.
Support compliance, retention, data protection, auditing, and information governance capabilities.
Assist with enterprise security, compliance, and identity protection tools.
Administer and support hybrid directory and cloud identity environments.
Support MFA, access controls, and authentication workflows.
Assist with identity lifecycle processes, group management, access reviews, and privileged access controls.
Support security initiatives related to endpoint protection, vulnerability remediation, logging, monitoring, and compliance.
Collaborate with Security and Infrastructure teams to ensure systems meet internal standards and regulatory requirements.
Support core networking services including TCP/IP, DNS, DHCP, routing, switching, WAN, ISP connectivity, and VPN access.
Support enterprise network infrastructure including firewalls, switches, wireless access points, and related management platforms.
Configure and troubleshoot VPNs, firewall rules, network segmentation, and security policies.
Support enterprise security tools related to endpoint security, email security, web protection, network access control, remote access, and network monitoring.
Coordinate with vendors and support partners as needed.
Build, administer, and troubleshoot Windows and Linux virtual machines using enterprise virtualization platforms.
Monitor performance, optimize resource allocation, and support high availability and resource scheduling configurations.
Assist with backup, restore, and disaster recovery operations.
Monitor, update, and resolve tickets using enterprise IT service management tools.
Use remote monitoring and management tools for monitoring, automation, endpoint/server management, and operational support.
Serve as an escalation point and technical mentor for HelpDesk and support teams.
Maintain clear and accurate documentation using enterprise documentation or knowledge management platforms.
Collaborate with cross-functional teams on infrastructure upgrades, cloud initiatives, security improvements, and business integrations.
Provide expert troubleshooting and root-cause analysis across Linux, Windows, Azure, Microsoft 365, virtualization, identity, and networking platforms.
Participate in IT projects, including infrastructure modernization, acquisitions, migrations, and office integrations.
Support compliance-related activities, including audit support and documentation requirements in regulated environments.