Sr. Windows Systems Administrator

Halvik Corp delivers a wide range of services to 13 executive agencies and 15 independent agencies. Halvik is a highly successful WOB business with more than 50 prime contracts and 500+ professionals delivering Digital Services, Advanced Analytics, Artificial Intelligence/Machine Learning, Cyber Security and Cutting-Edge Technology across the US Government. Be a part of something special.

Position Overview

We are seeking a highly motivated Senior Windows System Administrator to ensure the stability, reliability, and performance of our enterprise Windows environment. This role requires deep expertise in Microsoft Exchange and Active Directory to provide highly reliable communication services to our customers. As a key technical leader, you will manage and maintain both virtual and physical infrastructure, working collaboratively with a cross-functional team of Systems Administrators, Database Administrators, Software Developers, and Cybersecurity Engineers.

Core Responsibilities

• Strategic Execution: Drive the transition from manual, reactive maintenance to proactive, automated engineering and infrastructure management.
• Operational Oversight: Move beyond day-to-day troubleshooting to take accountability for the reliability, security, scalability, and strategic direction of the Windows-based infrastructure.
• Collaboration: Coordinate with systems engineers, Cybersecurity, and Database Engineers to seamlessly integrate systems, enforce security policies, and deliver robust IT solutions.
• Technical Performance: Act as a technical escalation point. Optimize system performance, automate repetitive tasks, and ensure high availability across the enterprise.
• Duties and Responsibilities

Infrastructure & Virtualization Management

• Maintain, manage, and provision servers, hardware, software, and network components.
• Configure and support virtualization and hyperconverged environments, including VCenter, vSphere, VMware ESXi, NSX Enterprise, Nutanix AHV, and Nutanix Flow.
• Administer and support Windows Server 2022 and Microsoft Exchange SE (on-premises).
• Perform network backup, recovery, and server troubleshooting within Cohesity and Nutanix virtual environments.

Automation & Deployment

• Write and maintain code in Windows PowerShell 7.0 and batch scripts for administration, process automation, and issue resolution.
• Perform automated deployments, patching, and server imaging utilizing common imaging tools.
• Evaluate new hardware and software with the goal of improving and increasingly automating IT operations.

Security & Compliance

• Execute security hardening and patching for all Windows environments.
• Ensure the security of Windows hosts and provide required artifacts and documentation for Continuous Diagnostics and Mitigation (CDM) compliance.

Support & Service Delivery

• Monitor helpdesk issues; perform advanced troubleshooting and issue resolution.
• Resolve ITSM support tickets for internal and external users, engaging external vendor resources when necessary to resolve complex client issues.
• Work directly with customers to ensure their specific IT and operational needs are met.
• Document all service processes, procedures, and system configurations in a centralized repository.
• Execute planned evening and weekend maintenance tasks and provide emergency on-site/remote support after normal business hours.
• Provide purchase recommendations for servers, desktops, laptops, and software.
• Track and manage project tasks to ensure timely completion.
• Mentor, guide, and share knowledge with junior team members.

Minimum Requirements

• Education: Bachelor's degree in computer science, Information Technology, or a related field.
• Experience: Minimum of 12 years of professional experience in Windows Systems Administration. Must have proven experience migrating or managing environments from Windows Server 2016 through Server 2022, as well as VMware vCenter Server, vSphere Data Center, and NSX Data Center.
• Technical Proficiency: Advanced knowledge of Windows Server 2022 and Exchange SE (on-premises). In-depth, practical experience with PowerShell scripting and automation.
• Compliance: Must meet [Specific Agency/Contract] requirements.
• Certifications: CompTIA Security+ AND current Windows Server Hybrid Administrator Associate (or legacy MCSE/MCSA).

Preferred Expertise

• Demonstrated success in designing, implementing, and maintaining highly available Windows Server and Microsoft Exchange environments, including site resilience planning, disaster recovery planning, and execution.
• Familiarity with tools related to email security, spam filtering, and gateway management (Proofpoint preferred).
• Exceptional analytical, communication, and problem-solving capabilities.