Senior System Administrator

Esmcorp; Fort Belvoir (VA); On-site; USD 110,000 - 145,000; Full time

Job summary

Enterprise Solutions and Management (ESM) seeks a Senior Systems Administrator to deliver Tier 3 support for on‑prem and cloud environments, including NIPRNet/SIPRNet. You will manage endpoint security, configuration, and compliance using Intune, Defender for Endpoint, Tanium, and Group Policy, coordinating with DLA mission objectives.

You will lead troubleshooting, vulnerability management, and integrations, while training users and collaborating across teams to implement secure, resilient IT

Qualifications

• Knowledge and experience administering, configuring, maintaining, upgrading, and troubleshooting enterprise systems across on-premises and cloud environments, including Windows servers, endpoints, and enterprise management platforms.
• Knowledge of endpoint management, configuration, vulnerability management, and cybersecurity practices, including Microsoft Intune, Defender for Endpoint, Tanium, Forescout, Group Policy, and implementation of security requirements.
• Ability to diagnose and resolve complex network, connectivity, application, and endpoint issues, including application networking, load balancing, high availability, and fault-tolerant environments.
• Ability to analyze complex technical problems, identify root causes, develop effective solutions, and provide Tier 3 support to end users and Tier 1/2 support teams.
• Ability to communicate effectively with customers, technical teams, vendors, and external partners while providing technical guidance, end-user training, documentation, and responsive customer-focused support.
• Ability to research and learn new technologies, adapt to evolving mission requirements, and evaluate and recommend technology solutions that improve system functionality, security, and operational effectiveness.

Responsibilities

• Provide Tier 3 support to end users and Tier 1/2 teams across multiple locations, including local and remote environments.
• Plan, deploy, configure, maintain, upgrade, troubleshoot, and integrate systems while ensuring compliance with functional, operational, and security requirements.
• Support COTS collaboration tools such as ZoomGov and Adobe Connect and implement endpoint security requirements.
• Perform vulnerability management, application networking support, load balancing, fault-tolerant configurations, and system integrations.
• Research, learn, and apply new technologies; provide end-user training and documentation; collaborate with internal teams and external partners.

Skills

Tier 3 support

Network troubleshooting

Endpoint management

Cybersecurity practices

Customer-focused communication

Tools

Microsoft Endpoint Configuration Manager

Intune

Defender for Endpoint

Tanium

Forescout

Group Policy

Microsoft 365

Dell Wyse Management Suite

Menlo Security Console

Azure services

Job description

Enterprise Solutions and Management (ESM) is a rapidly growing government contractor that provides strategic IT services that meet mission needs for Defense and Federal customers. We are hiring a Senior System Administrator to support an enterprise-level program within a federal environment.

The Senior Systems Administrator provides Tier 3 systems administration, endpoint management, security, and operational support for on-premises and cloud-hosted NIPRNet and SIPRNet environments. The role supports enterprise technologies including Menlo Security, Dell Wyse Device Management Suite (WMS), Tanium, Forescout, Microsoft Endpoint Configuration Manager, and Microsoft 365 services such as Teams, Defender for Endpoint, Intune, SharePoint Online, and Advanced Group Policy Management. Responsibilities include planning, deploying, configuring, maintaining, upgrading, troubleshooting, and integrating systems while ensuring compliance with functional, operational, and security requirements. The position also supports COTS collaboration tools such as ZoomGov and Adobe Connect and implements USCYBERCOM endpoint security requirements in support of DLA's Endpoint Operations mission.

As a member of the J64 Enterprise Software & Mobility Branch, the Senior Systems Administrator provides customer-focused Tier 3 support to end users and Tier 1/2 teams across multiple locations, including both local and remote environments. Responsibilities include resolving complex software, connectivity, networking, and endpoint issues; performing vulnerability management; supporting application networking, load balancing, and fault-tolerant configurations; and assisting with server and application installations, upgrades, and integrations. The role requires adaptability, continuous learning, technical research, collaboration with internal teams and external partners, end-user training, and the ability to recommend and implement technology solutions aligned with DLA's mission and business objectives.

Required Knowledge, Skills and Abilities (KSA)

• Knowledge and experience administering, configuring, maintaining, upgrading, and troubleshooting enterprise systems across on-premises and cloud environments, including Windows servers, endpoints, and enterprise management platforms.

• Knowledge of endpoint management, configuration, vulnerability management, and cybersecurity practices, including Microsoft Intune, Defender for Endpoint, Tanium, Forescout, Group Policy, and implementation of security requirements.

• Ability to diagnose and resolve complex network, connectivity, application, and endpoint issues, including application networking, load balancing, high availability, and fault-tolerant environments.

• Ability to analyze complex technical problems, identify root causes, develop effective solutions, and provide Tier 3 support to end users and Tier 1/2 support teams.

• Ability to communicate effectively with customers, technical teams, vendors, and external partners while providing technical guidance, end-user training, documentation, and responsive customer-focused support.

• Ability to research and learn new technologies, adapt to evolving mission requirements, and evaluate and recommend technology solutions that improve system functionality, security, and operational effectiveness.

Desired KSA

• Be a positive, self-motivated, and proactive person with the ability to adapt to change and tolerate stressful situations.

• Candidate must communicate effectively with team members, team lead, management, and government customer(s).

• Must have the ability and desire to research and develop creative solutions to unique problems with minimal supervision.

Minimum Training, Education, and Certifications

• Five (5) years of progressive experience working in a medium to large IT

environment.

• Three years of above experience in the integration and management of Windows

application servers and the installation, configuration, and support of applications and devices.

• Two (2) or more years' experience with technical troubleshooting and hands-on

experience with Microsoft 365 -or- Microsoft Azure

Preferred Experience:

• Five years Systems Administration experience with any of the following Microsoft Operating Systems: Windows 10, Windows 11, Server 2016 (or newer)

• Three years' experience with Active Directory Administration with MS 2016 (or newer)

• Two years' experience supporting Dell Wyse Management Suite

• Two years' experience supporting TANIUM

• Two years' experience supporting Menlo Security Console

• Two years' experience working with Microsoft Azure infrastructure or services (e.g.

Defender, Intune, Purview).

• Two years' experience conducting application testing with software solutions within the past two years

• Five years' experience with scripting automation using PowerShell or VBScript.

• Four years' experience with Microsoft SCCM or MECM administration within the past three years.

• Azure Administrator Associate or higher level

• DOD 8570 baseline certification - IAT Level II

Minimum Clearance

• Top Secret

Physical Requirements

• Required to stand, walk and sit; communicate verbally both in person and by telephone; use hands to finger, handle or feel objects or controls; reach with hands and arms. Regularly required to stoop, kneel, bend, crouch and lift up to 25 pounds. Specific vision abilities required by this job include close vision, distance vision, depth perception, color vision and the ability to adjust focus.

• Physical demands associated with this position include extensive walking (including stairs) throughout offices and between buildings. May require use of public transportation, personal or Government vehicle to drive to local and/or remote office locations.

Additional Requirements

• Other duties as assigned

ESM provides equal employment opportunity to all individuals regardless of race, color, creed, religion, gender, age, sexual orientation, national origin or ancestry, disability, genetic information, veteran status, gender identification or any other characteristic protected by state, federal or local law.