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# Senior Systems Engineer

- **Company:** Mantech International Corporation
- **Location:** Chantilly, VA, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Multitier Architecture, Microsoft Windows, Active Directory, Systems Engineering, Configuration Management, Information Systems, System Configuration, Data Integrity, Dynamic Host Configuration Protocol, Linux, DevOps, Domain Name System (DNS), Microsoft Exchange Server, IBM Hardware Management Console, Windows Servers, Red Hat Enterprise Linux, Standard Sql, Microsoft SharePoint, Software Project Management, SQL Databases, Software Vulnerability Management, DevOps Tools - Open-source, System Availability, Infrastructure as Code (IaC), Information Technology
- **Published:** November 14, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9314214/senior-systems-engineer

## About the Role

MANTECH seeks a motivated, career and customer-oriented Senior Systems Engineer to join our team in Chantilly, VA. This is an onsite position., * Bachelor's degree with 5+ years of experience in Information Systems or a related field. Associates degree with 7+ years or High School Diploma/GED with 10+ years of progressively responsible experience may be substituted for a degree

 * Demonstrated hands-on experience administering and troubleshooting core IT services, including Active Directory, DNS, and SQL
 * Experience managing enterprise data backups and supporting user interfacing services like printing and scanning
 * Must hold IAT Level II certification, ex., Security+, SecurityX, CISSP, * Solid understanding of configuration management, system patching, and structured change management practices in enterprise environments
 * Experience with Microsoft Exchange and Sharepoint
 * Experience with network documentation, such as security compliance, configuration management, patching, software management, and hardware management
 * Experience administering and supporting infrastructure within secure government or classified IT environments
 * Relevant industry certifications, ex., Windows Server Hybrid Administrator Associate, or equivalent
 * Self-starter with excellent people skills - able to work across teams and effectively communicate technical concepts
 * Knowledge or experience with DevSecOps tools, process, and concepts
 * Knowledge or experience with Infrastructure as Code (IaC) and Configuration as Code (CaC) are modern DevOps practices that manage and automate IT systems

Clearance Requirements:

 * Must have a current and active Top Secret with SCI eligibility with willingness to obtain a polygraph

Physical Requirements:

 * Must be able to remain in a stationary position 50%
 * Needs to occasionally move about inside the office to access file cabinets, office machinery, etc.
 * Frequently communicates with co-workers, management, and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situations

## Description

The Systems Engineer will leverage their strong technical background and knowledge to support the operational piece of a mission-critical enterprise IT environment. In this role, you will help administer, maintain, and troubleshoot core services, ensuring system availability, integrity, and robust configuration management., * Provide Tier II IT Systems support on a wide range of technologies, including: SQL, SharePoint, Microsoft Exchange, Certificate Services, DHCP, DNS, Active Directory, Group Policies, Microsoft Windows Operating Systems, and Linux (Red Hat)

 * Provide System support on enterprise backup and recovery solutions to ensure data integrity and system availability
 * Provide System support for enterprise patching and vulnerability management for Linux and Windows systems
 * Executing structured configuration and change management processes to ensure system integrity and documentation accuracy
 * Diagnosing and resolving the performance, security, and/or technical challenges related to the platforms listed above
 * Creating, maintaining, and communicating technical documentation for system configurations and Standard Operating Procedures (SOPs)
 * Investigating and resolving operational problems in conjunction with other engineering and technical personnel
 * Using best practices from ITIL Service Management, Configuration and Change Management processes, and enterprise service delivery to consistently deliver high-quality work products
 * Willingness to occasionally work after normal work hours (nights and weekends) to support system maintenance or service outages