Senior Windows System Administrator – Infrastructure/Citrix - Leidos

Description

Leidos is a FORTUNE 500 company bringing a mix of innovative technology and sector expertise to customers in the national security, engineering, and the health industries. Leidos is seeking an Senior Windows System Administrator for a position as part of a team supporting the Defense Information Security Agency (DISA) in Pensacola, FL. This is an onsite position, no full-time telework allowed.     

Primary Responsibilities

• Build, install, configure, maintain, troubleshoot and repair computer workstations, servers and IT related peripherals (printers, scanners, etc.) 
• Manage and maintain both physical and virtual Windows infrastructures including domain controllers, domain name servers, file print servers, share drives, etc. 
• Perform various system administration tasks including Active Directory management and the creation and maintenance of Group Policies, Certificate Revocation Lists (CRL) and user/service accounts
• Validate current security posture and perform system configuration changes, as required or as directed by higher authority, to improve enterprise security
• Leverage Group Policy Objects, Security Content Automation Protocol (SCAP) tool and Security Technical Information Guides (STIGs) to maintain required infrastructure security levels and system hardening
• Install and configure software, firmware, upgrades and security updates/patches to maintain and secure Windows 10/11 and Server 2019/2022 operating systems and associated hardware
• Utilize system error logs, user-reported errors and diagnostics scans to troubleshoot and repair hardware and software problems
• Assist in planning and implementing new hardware/software upgrades of IT infrastructure 
• Provide support to engineers for architecture design analysis for technology refresh planning and implementation
• Performs periodic backup and restoration of servers.
• Monitors license and PKI Certificate status, on the systems and coordinates the renewal and installation, as needed.
• Conducts technical analysis and provides documentation (Standard Operating Procedures (SOPs), troubleshooting and monitoring, technical reports, etc.) for root cause analysis, technical assessment and process improvement initiatives.

Basic Qualifications

• Bachelor's degree in an Information Technology (IT) technical field and 5+ years of relevant IT experience.
• Must have an active Secret clearance and pass a drug test.
• Must have a DoD 8570 IAT Level I approved certification (CompTIA Security+) 
• Bachelor's degree and five years of experience in the development, implementation and production support of a Microsoft Windows infrastructure/environment.
• Understanding of network services as related to Microsoft Windows environment (e.g. DNS, Firewalls, Routers, Ports and Protocols, etc.) 
• Cybersecurity knowledge and Windows server 2019 and 2022 administration experience including Active Directory, DNS and Group Policy, the deployment of Windows workstations/servers and the migration end-user data

• Demonstrated experience and/or familiarity with one of more of the following: Security Content Automation Protocol (SCAP), Security Technical Implementation Guides (STIGs), Information Assurance Vulnerability Management (IAVMs), etc.

• General understanding of cryptographic concepts: symmetric/asymmetric cryptography, secure hash, digital signatures
• Ability to maintain effective communication and working relationships with co-workers
• Proactive, dependable and accurate with strong attention to detail and organization
• Strong diagnostic and problem-solving skills

Preferred Qualifications

• Minimum of 1+ year experience with PowerShell Scripting
• Experience with certificate-enabled applications such as SSL/TLS, S/MIME, authentication, Encrypted File System, Code Signing, etc.
• Hands-on familiarity and experience with Axway Desktop Validator, 90Meter and HID ActivClient middleware applications
• Familiarity with or working knowledge of Citrix Virtual Apps and Desktops 2203/2204 LTSR components; Citrix Provisioning Services (PVS) architecture; Citrix Profile Manager; Workspace App and Citrix NetScaler environment or an equivalent combination of education and work experience.
• Ability to install and configure software, firmware, upgrades and security updates/patches to maintain and secure Windows 10/11, Server 2019/2022, Citrix and VMWare operating systems and associated hardware
• Build, install, configure, maintain and troubleshoot Citrix Virtual Apps and desktop farms, Citrix Hypervisors, Citrix FIPS NetScaler Gateway, VMware vSphere and VMware Horizon Virtual Desktops
• Identify and correct inefficiencies and implement optimizations to improve existing Windows and Citrix infrastructures, as needed.
• Monitor Citrix infrastructure and identify system alerts, before they impact customers, including storage availability/capacity, performance latency, network connectivity, database health, and other daily health checks, as required.
• VMware vCenter and VMware ESXi experience
• Virtualization, to include VMWare's entire vSphere Platform and Citrix Hypervisor

• Storage, to include VMWare vSAN and Citrix Pool
• VMWare Horizon Virtual Desktop Infrastructure (VDI)
• Familiarity with or working knowledge of Citrix Virtual Apps and Desktops (CVAD)
• Netscaler MPX, Citrix Application Delivery Controller / Load Balancing with End-to-End FIPS secured communications

Original Posting Date:

While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.