Junior Systems Security Administrator Job at Robert Half (Sugar Land, TX)

Junior System/Network Administrator

We are seeking a Junior System/Network Administrator with IT Helpdesk responsibi...

Location

India , Hyderabad

Salary:

Not provided

RADcube

Expiration Date

Until further notice

Requirements

Bachelor’s degree in Information Technology, Computer Science, or related discipline
2+ years of experience in system administration, network support, or helpdesk support roles
Solid understanding of Windows OS, desktop administration, and common enterprise applications
Experience with networking fundamentals: TCP/IP, DNS, DHCP, LAN/WAN, Wi-Fi
Familiarity with Active Directory, O365 administration, and remote support tools
Ability to diagnose issues logically and provide prompt resolutions
Strong customer service, communication skills, and teamwork mindset

Job Responsibility

Deliver first-level technical support to employees via phone, email, and ticketing systems
Troubleshoot and resolve issues related to operating systems, hardware, software, and peripherals
Monitor system and network performance to ensure secure and stable operations
Assist with installation, configuration, and maintenance of desktops, servers, switches, routers, and Wi-Fi access points
Manage user accounts, access permissions, and group policies (Active Directory, O365)
Support LAN/WAN connectivity issues, IP configuration, DNS/DHCP queries, and VPN access
Perform OS updates, security patching, antivirus monitoring, and backup support activities
Maintain accurate documentation of assets, incidents, system configurations, and support procedures
Coordinate issue escalations with senior system/network administrators
Prepare workstations and IT access for new hires and support equipment refreshes

Fulltime

Senior Information System Security Officer

We are seeking a highly skilled and mission-driven Senior Information Systems Se...

Location

United States , Clarksburg

Salary:

Not provided

Innovative Management & Technology Services

Expiration Date

Until further notice

Requirements

Bachelor’s degree in Cybersecurity, Information Systems, Computer Science, or a related field (or equivalent combination of education and experience)
8+ years of progressive experience in information systems security, with at least 3 years in a senior-level or lead ISSO role supporting federal or state government agencies
Strong working knowledge of: NIST 800-53, RMF, FISMA, OWASP Top 10, and SANS Institute standards
SAFe Agile environments and integrating security in Agile workflows
Networking, Linux/Windows system administration, and secure software development practices
Cloud platforms (AWS, Azure, GCP) and related security tools (e.g., AWS Security Hub, Azure Defender)
Experience in managing security documentation, participating in audits, and working with compliance frameworks
Relevant certifications such as CISSP, CISM, Security+, CEH, or equivalent
Active Top Secret clearance is required
U.S. Citizenship is required

Job Responsibility

Lead the implementation and maintenance of system security controls in compliance with federal cybersecurity frameworks, including NIST SP 800-53, RMF, OWASP, DISA STIGs, and Common Criteria
Oversee the full lifecycle of Authorization to Operate (ATO) processes, including preparation of System Security Plans (SSPs), Security Assessment Reports (SARs), POA&Ms, and risk assessments
Serve as a senior security advisor and liaison to system owners, developers, DevOps engineers, and government stakeholders
Participate in technical reviews of system architecture and ensure secure design of virtualized and software-defined infrastructures
Support integration of security controls into CI/CD pipelines using DevSecOps principles and tools (e.g., Jenkins, GitLab CI, SonarQube, Snyk)
Provide security engineering support for modern cloud environments, including AWS, Azure, or Google Cloud Platform, and assess cloud-native security capabilities
Conduct vulnerability assessments, interpret scan results from tools like Tenable, Nessus, Splunk, or Qualys, and lead remediation efforts
Mentor junior ISSOs and analysts on security policies, best practices, and tool usage
Ensure continuous monitoring activities are aligned with organizational risk tolerance and compliance goals

What we offer

competitive compensation
excellent benefits including tuition reimbursement and employer-contributed 401K
referral bonuses

Fulltime

Systems Administrator

AnaVation is seeking a Systems Administrator to join our team and support our mi...

Location

United States , Reston

Salary:

Not provided

AnaVation

Expiration Date

Until further notice

Requirements

Active TS/SCI Clearance with Polygraph
Bachelor’s degree and 8 years of experience related to specific functional area
Currently hold, or be able to attain a CompTIA Security+ certification or equivalent IAT Level II
Ability to write scripts using PowerShell and/or Bash
Experience managing VMware, Nutanix, and other types of enterprise level Virtual Infrastructures
Proficient in managing and troubleshooting Active Directory and Group Policy Object (GPO)
Working collaboratively across cross-functional teams of all experience levels
Monitoring and managing system resources, including CPU, storage, and other cloud resources to maintain operating efficiency performance
Performing systems security administration functions, including creating user profiles and accounts
Experience setting up administrator accounts, maintaining system documentation, tuning system performance, installing system wide software and allocating resources for database and other application hosting

Job Responsibility

Plan, design, and implement infrastructure changes and system upgrades
Manage and troubleshoot multiple VMware environments
Provide Windows Server and Linux administration, maintenance, and troubleshooting
Create STIG compliant images for Windows Desktop, Windows Server, and Linux OS
Create, test, and deploy software packages using software deployment products such as SCCM, PDQ, etc
Provide expert level support and mentoring for Mid and Junior System Administrator personnel
Develop and maintain installation and configuration procedures for system and software changes
Utilize scripting to automate common tasks
Perform hardware maintenance/repair activities
Ensure proper planning and execution of major projects/maintenance activities

What we offer

Generous cost sharing for medical insurance for the employee and dependents
100% company paid dental insurance for employees and dependents
100% company paid long-term and short term disability insurance
100% company paid vision insurance for employees and dependents
401k plan with generous match and 100% immediate vesting
Competitive Pay
Generous paid leave and holiday package
Tuition and training reimbursement
Life and AD&D Insurance

Fulltime

Senior Linux System Administrator - Support Engineer

Senior Linux System Administrator/System Support Engineer with expertise support...

Location

Australia , Canberra

Salary:

Not provided

Hewlett Packard Enterprise

Expiration Date

Until further notice

Requirements

Bachelor's degree in Computer Science, Information Technology, or related field, or equivalent work experience
At least 5 years of hands-on experience managing Linux systems in production environments, including HPC systems
Expertise in Linux/Unix operating systems, parallel file systems (Lustre, GPFS), and networking technologies
Proficiency in scripting/programming languages (Bash, Python, Perl, C++)
Experience with automation/configuration management tools (Ansible, Puppet, Chef, Terraform)
Strong understanding of networking concepts (TCP/IP, DNS, DHCP, firewalls, VPNs)
Familiarity with monitoring/logging tools (Nagios, Grafana, ELK Stack)
Experience with containerization technologies (Docker, Kubernetes)
Excellent problem-solving, analytical, and communication skills
Demonstrated ability to work independently in multi-technology environments and collaborate across teams

Job Responsibility

Deploy, configure, maintain, and troubleshoot Linux servers (Red Hat, CentOS, Ubuntu, or others) across physical, virtual, and cloud environments
Support, maintain, and optimize HPC systems, including installation, servicing, and advanced technical troubleshooting of hardware/software and parallel file systems
Monitor system performance, availability, and security using industry-standard tools and practices
Plan and execute upgrades, patches, enhancements, and migrations to ensure systems are current, secure, and optimized
Automate system administration tasks using scripting languages and configuration management tools
Implement and maintain backup/recovery strategies, disaster recovery plans, and system documentation
Collaborate with development, network, and security teams to support application deployments and troubleshoot issues
Provide technical consulting, mentoring, and guidance to junior team members
Ensure compliance with strict security protocols in sensitive environments
Participate in on-call rotation and respond to system incidents and outages

What we offer

Competitive salary and performance-based bonuses
Comprehensive health, dental, and vision insurance
Retirement plan options
Paid time off and holidays
Professional development opportunities
Flexible work arrangements

Fulltime

IT System Administrator

We are looking for a skilled IT Linux Administrator to ensure the smooth operati...

Location

Romania , Bucharest

Salary:

Not provided

Conectys Serv Telecom

Expiration Date

Until further notice

Requirements

Bachelor’s degree in computer science, Information Technology, or related field
3+ years of hands-on Linux administration experience in production environments
Proven experience with multi-tier application architecture and enterprise-level systems
Linux OS Expertise: Red Hat, CentOS, Ubuntu, Debian
Networking & Security: TCP/IP, DNS, VPN, firewalls, VLAN, SSL/TLS
Scripting & Automation: Bash, Python, Perl
configuration management tools
Virtualization & Cloud: VMware, KVM, AWS, Azure, OpenStack
Containerization: Docker, Kubernetes
Monitoring & Performance Tuning: Nagios, Zabbix, Grafana

Job Responsibility

Install, configure, and maintain Linux servers
Perform OS upgrades, patching, and security hardening
Manage user accounts, permissions, and access control
Monitor system, application, and network performance
Diagnose and resolve hardware, software, and networking issues
Implement proactive measures to prevent downtime
Apply security best practices
Ensure compliance with internal InfoSec policies and regulatory standards
Develop scripts (Bash, Python, Perl) for automation of routine tasks
Implement configuration management tools

What we offer

A competitive salary paired with great benefits
Plenty of opportunities to learn, grow, and advance your career
A supportive, collaborative team in a dynamic and engaging environment

Junior System Engineer

Location

Hong Kong , Hong Kong

Salary:

Not provided

Eurostop

Expiration Date

Until further notice

Requirements

Minimum 1 year of experience as system engineer. Fresh graduates are welcomed to apply as a trainee
Should expect to provide 24×7 on-call for emergency production incidents and provide on-site support for fire-fighting
Worked in a global role in a multi-national company is an advantage
Experience in delivering support to end-users via remote connection applications over the Internet
Experience in Windows Server, RedHat Enterprise Linux and Cloud Platforms
Good co-ordination – Experience designing infrastructure solutions
Understanding of SaaS, AWS, AzureProduction Support, ITIL workflow
Knowledge of firewall settings and infrastructure security
Knowledge of MS SQL, MySQL, Oracle, or another database
Knowledge of DevOps, Docker, K8s, Ansible is a plus

Job Responsibility

Design and implement cost-effective hardware and software systems architectures or cloud architectures that satisfies project requirements
Identify and analyse system integration problems, formulate and implement corrective and preventive plans
Lead and coordinate with system administrators and all project team members in implementation, configuration, testing, system rollout and maintenance
On-call for support cases
Willing to work on additional tasks and responsibilities that will contribute towards team, department, and company goals
System engineer may work for clients in different time zones and will work accordingly in the client’s time zone when assigned

Fulltime

Systems Administrator IV

Location

United States , Huntsville, Alabama

Salary:

Not provided

Arcfield

Expiration Date

Until further notice

Requirements

BS with 8-10, MS 6-8, PhD 3-5
Must possess and maintain an Active DoD Secret clearance
Expert-level experience administering Active Directory, including Domain Controllers, DNS, Group Policy, trusts, and recovery operations
Strong hands-on experience with Windows Server 2019/2022 and Windows 11 in domain-joined environments
Proven experience operating VMware vSphere and ESXi in production environments
Strong understanding of system hardening, STIG implementation, and vulnerability remediation
Experience supporting RMF and ATO processes and interacting with auditors and assessors
Ability to troubleshoot complex, multi-layered system issues in restricted or air-gapped environments
Active IAT Level II certification (Security +, etc.)

Job Responsibility

Lead installation, configuration, hardening, and sustainment of on-prem Windows systems, including Windows Server 2019/2022 and Windows 11, across multiple enclaves and classification levels in compliance with DISA STIGs and NIST 800-53
Architect, administer, and sustain Active Directory Domain Services, including domain and forest design, Domain Controller deployment and lifecycle management, replication, FSMO role management, backup and recovery, DNS, DHCP, time services, trust relationships, and cross-domain integration
Architect, implement, and sustain Group Policy architecture and lifecycle management, including GPO design, testing, deployment, troubleshooting, enforcement of security baselines, workstation hardening, and user, computer, and OU design aligned with least-privilege principles
Architect, operate, and sustain VMware vSphere and ESXi environments, including host lifecycle management, virtual networking, storage integration using NFS and/or vSAN, performance tuning, and fault recovery
Plan, integrate, and validate new systems and technologies in coordination with network, cybersecurity, and engineering teams while maintaining operational stability
Perform advanced system troubleshooting across operating systems, identity services, virtualization, and authentication layers in restricted or air-gapped environments
Execute vulnerability management activities, including Nessus and SCAP scanning, analysis of findings, remediation, and validation of compliance
Serve as the technical subject matter expert for Windows and VMware platforms only during RMF and ATO activities, assessments, inspections, and audits by providing technical responses and evidence artifacts within the systems under their responsibility
Develop, maintain, and enforce system documentation, security baselines, architecture diagrams, SOPs, and recovery procedures
Design, implement, and maintain backup, restore, disaster recovery, and continuity of operations strategies for enterprise systems and directory services

Fulltime

Sr. System Engineer

Hewlett Packard Enterprise is the global edge-to-cloud company advancing the way...

Location

United States

Salary:

89400.00 - 206500.00 USD / Year

Hewlett Packard Enterprise

Expiration Date

Until further notice

Requirements

Master’s degree in computer science, or equivalent experience in a related field
7+ years of System and Cloud Administrator role
Experience leading and managing projects
Experience administering Windows AD, LDAP, and Domain Servers
Experience with mixed operating systems: mainly Linux and some Windows
Experience with Configuration Management and automation tools like Ansible, Chef, or Puppet
Experience with Virtualization (VMWare) and Storage Systems (NetApp, Nimble, Pure, etc.)
Project management
Experience in Hypervisors other than VMware. Ex. Proxmox , RHEL openshift
Knowledge of servers, storage, HCI, and FC switch configuration

Job Responsibility

Work closely with the business leaders to develop and implement project plans, risk assessments, capacity growth, and contingency plans
Remediate the Security Vulnerabilities for the systems
Supporting Windows and Linux Server Environments, including rack and stack the hardware
Active directory maintenance and monitoring as needed
Install, configure, test, and maintain operating systems, application software, and system management tools
monitor, and manage them
Proactively ensure the highest levels of systems and infrastructure availability
Monitor and test application performance for potential bottlenecks, identify possible solutions, and work with developers to implement those fixes
Maintain security, backup, and redundancy strategies
Document and automate the processes

What we offer

Health & Wellbeing
Personal & Professional Development
Unconditional Inclusion

Fulltime

Junior Systems Security Administrator

Robert Half

Location:
United States , Sugar Land, TX

Category:
IT - Administration

Contract Type:
Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Additional Information:

Job Posted:
January 12, 2026

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Job Description:

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