Windows Systems Administrator and Vulnerability Management Coordinator

Guidehouse; San Antonio (TX); On-site; USD 120,000 - 150,000; Full time

Benefits offered by this job

Medical Insurance

Rx Coverage

Dental Insurance

Vision Insurance

401k Plan

Paid Holidays

Job summary

Guidehouse is seeking a senior IT Cyber Security professional to manage Windows Server environments across on‑premises, Azure, and hybrid setups. You will implement hardening, patching, and performance tuning while supporting VMware workloads and migrations to the cloud.

You will automate tasks with PowerShell and Ansible, manage AD/DNS/DHCP, and ensure security compliance. This role requires 6+ years of hands‑on experience and strong communication skills.

Qualifications

• Six plus years of overall work experience in IT security/ops.
• Engineering-level experience with Microsoft Windows Server in enterprise data centers.
• Experience managing Windows workloads in Microsoft Azure, including hybrid cloud migrations.
• Experience with VMware-based infrastructure and virtualization platforms.
• Strong troubleshooting, root cause analysis, and resolution skills.
• Experience collaborating with technical and business stakeholders to deliver solutions.
• Experience with Ansible and PowerShell scripting for automation.
• Experience maintaining Active Directory, DNS, DHCP, and Group Policy.
• Familiarity with cloud monitoring, security, and compliance tools.
• Excellent written and verbal English communication; able to work with diverse teams.

Responsibilities

• Install, configure, patch, monitor, back up, and maintain Windows Server OS across environments.
• Monitor system performance, capacity, and availability; perform OS tuning.
• Support on-prem VMware vSphere workloads and migrations to Microsoft Azure.
• Manage Windows Server environments in Azure and other cloud platforms.
• Configure Active Directory, DNS, DHCP, and Group Policy in hybrid environments.
• Harden systems per cybersecurity policies and accreditation requirements.
• Identify and remediate OS security vulnerabilities.
• Automate tasks using PowerShell, Ansible, and related tools.
• Maintain source code and configuration repositories (GitLab).
• Provide 24x7 support and participate in on‑call activities.

Skills

PowerShell

Ansible

GitLab

Azure

VMware vSphere

Active Directory

DNS

Group Policy

ITIL

Cloud Monitoring

Tools

Carbon Black

CyberArk

Defender

Remedy

ServiceNow

Job description

Job Family

IT Cyber Security

Travel Required

None

Clearance Required

Ability to Obtain Public Trust

What You Will Do:

• Install, configure, patch, monitor, back up, and maintain Windows Server operating systems across physical, virtual, and cloud-hosted environments.


• Manage file systems and storage using volume management techniques; monitor and optimize file system performance.


• Monitor system performance, capacity, and availability while performing operating system tuning and optimization.


• Support on-premises VMware vSphere workloads and assist with workload migration and transition into Microsoft Azure.


• Manage Windows Server environments hosted in Azure and other cloud platforms.


• Utilize cloud-native tools such as Azure Monitor, Azure Update Management, and Defender for Cloud to maintain system health, performance, and compliance.


• Configure and maintain Active Directory, DNS, DHCP, Group Policy, and related Windows services across hybrid environments.


• Harden systems in accordance with cybersecurity policies, standards, regulations, and accreditation requirements.


• Identify, remediate, and resolve operating system security vulnerabilities.


• Manage domain user accounts, permissions, and role assignments.


• Troubleshoot and resolve Tier 3 incidents and service requests while coordinating with customers and vendors as needed.


• Automate administrative and operational tasks using PowerShell, Ansible, and related automation tools.


• Maintain enterprise source code and configuration repositories using GitLab.


• Provide 24x7 operational support and participate in on-call activities as required.


• Document system changes, incidents, and problem resolutions using Configuration Management and ITSM tools.


• Develop and provide knowledge transfer documentation to support operational continuity.


• Participate in Agile and DevSecOps initiatives supporting infrastructure and platform services.


• Support Windows Server 2016, 2019, and 2022 environments across VMware, Azure, AWS, and GCP platforms.


• Administer and support technologies including Azure VMware Solution (AVS), VMware vSphere, PowerShell, Ansible, GitLab, Carbon Black, CyberArk, Defender, Remedy, and ServiceNow.

What You Will Need:

• Minimum of SIX (6)+ years of overall work experience.


• Engineering-level experience supporting Microsoft Windows Server in enterprise data center environments.


• Experience managing Windows workloads in Microsoft Azure, including hybrid cloud environments and workload migrations.


• Experience supporting VMware-based infrastructure and virtualization platforms.


• Demonstrated ability to lead troubleshooting, root cause analysis, and resolution efforts for complex technical issues.


• Experience collaborating with technical and business stakeholders to deliver operational solutions.


• Experience with Ansible.


• Strong experience with PowerShell scripting and infrastructure automation.


• Experience using automation tools, with Ansible preferred.


• Experience supporting and maintaining Active Directory, DNS, DHCP, Group Policy, and other core Windows services.


• Working knowledge of cloud monitoring, security, and compliance tools.


• Strong written and verbal communication skills in English.


• Exceptional customer service and client support capabilities.


• Strong organizational, multitasking, time-management, and prioritization skills.


• Ability to communicate technical concepts effectively to both technical and non-technical audiences.


• Experience operating within ITIL-based service management environments.


• Ability to work both independently and collaboratively in a fast-paced environment.


• Willingness to participate in 24x7 support activities and occasional on-site response requirements.


• U.S. Citizenship is required in accordance with this contract. No visa or sponsorship eligibility offered


• Must be able to OBTAIN and MAINTAIN a Federal \"PUBLIC TRUST\".. Candidates with an ACTIVE PUBLIC TRUST or SUITABILITY are preferred.

What Would Be Nice To Have:

• Experience with Azure VMware Solution (AVS) or similar hybrid cloud hosting models.


• Experience supporting cloud platforms beyond Azure, including AWS and Google Cloud Platform (GCP).


• Hands‑on experience with cybersecurity tools such as Carbon Black, CyberArk, Microsoft Defender, and related security technologies.


• Experience with GitLab-based source code and configuration management practices.


• Familiarity with Agile delivery methodologies and DevSecOps practices.


• Experience with ITSM platforms including ServiceNow and Remedy.


• Knowledge of security accreditation, compliance, and system hardening processes within federal environments.


• Experience participating in enterprise cloud modernization or migration initiatives.


• Microsoft, Azure, VMware, ITIL, Security, or automation‑related certifications.

What We Offer:

Guidehouse offers a comprehensive, total rewards package that includes competitive compensation and a flexible benefits package that reflects our commitment to creating a diverse and supportive workplace.

Benefits include:

• Medical, Rx, Dental & Vision Insurance


• Personal and Family Sick Time & Company Paid Holidays


• Parental Leave


• 401(k) Retirement Plan


• Group Term Life and Travel Assistance


• Voluntary Life and AD&D Insurance


• Health Savings Account, Health Care & Dependent Care Flexible Spending Accounts


• Transit and Parking Commuter Benefits


• Short-Term & Long-Term Disability


• Tuition Reimbursement, Personal Development, Certifications & Learning Opportunities


• Employee Referral Program


• Corporate Sponsored Events & Community Outreach


• Care.com annual membership


• Employee Assistance Program


• Supplemental Benefits via Corestream (Critical Care, Hospital Indemnity, Accident Insurance, Legal Assistance and ID theft protection, etc.)


• Position may be eligible for a discretionary variable incentive bonus

About Guidehouse

Guidehouse is an Equal Opportunity Employer–Protected Veterans, Individuals with Disabilities or any other basis protected by law, ordinance, or regulation.

Guidehouse will consider for employment qualified applicants with criminal histories in a manner consistent with the requirements of applicable law or ordinance including the Fair Chance Ordinance of Los Angeles and San Francisco.

If you have visited our website for information about employment opportunities, or to apply for a position, and you require an accommodation, please contact Guidehouse Recruiting at 1-571-633-1711 or via email at [e-mail] . All information you provide will be kept confidential and will be used only to the extent required to provide needed reasonable accommodation.

All communication regarding recruitment for a Guidehouse position will be sent from Guidehouse email domains including @guidehouse.com or [e-mail] . Correspondence received by an applicant from any other domain should be considered unauthorized and will not be honored by Guidehouse. Note that Guidehouse will never charge a fee or require a money transfer at any stage of the recruitment process and does not collect fees from educational institutions for participation in a recruitment event. Never provide your banking information to a third party purporting to need that information to proceed in the hiring process.

If any person or organization demands money related to a job opportunity with Guidehouse, please report the matter to Guidehouse’s Ethics Hotline. If you want to check the validity of correspondence you have received, please contact [e-mail] . Guidehouse is not responsible for losses incurred (monetary or otherwise) from an applicant’s dealings with unauthorized third parties.

Guidehouse does not accept unsolicited resumes through or from search firms or staffing agencies. All unsolicited resumes will be considered the property of Guidehouse and Guidehouse will not be obligated to pay a placement fee.