Step Forward With Us

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do.

L3Harris Technologies is the Trusted Disruptor in the defense industry. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.

Job Title: Senior Specialist, Windows Systems Engineer

Job Code: 23513

Job Location: Schriever SFB, CO

Job Description:

L3Harris Technologies is seeking a Senior Windows Systems Engineer to support secure, high-availability Windows-based infrastructure in a classified enterprise environment. This role is critical to maintaining system integrity, security compliance, and operational readiness in support of national security missions.

The ideal candidate will be responsible for designing, configuring, and managing Active Directory environments, Group Policy Objects (GPOs), and core Microsoft services, and will collaborate across IT, cybersecurity, and mission operations teams to ensure system resilience and performance.

Essential Functions:

• Manage, maintain, and troubleshoot Windows Server environments (2016/2019/2022) in virtual and physical infrastructures.
• Administer Active Directory domains, organizational units, users, and service accounts, ensuring proper permissions and group policy application.
• Implement and support GPOs, login scripts, security baselines, and PKI integration for DoD-compliant systems.
• Maintain and monitor enterprise backup solutions and antivirus/endpoint security tools (e.g., Trellix, Defender, or Symantec).
• Support Windows patching and configuration management using WSUS, SCCM/MECM, or equivalent tools.
• Document procedures and configurations and provide escalation support to Tier 2 administrators.
• Collaborate with cybersecurity teams to ensure systems are compliant with STIGs and other hardening standards.
• Support audit readiness, incident response, and remediation efforts.
• Perform additional duties and responsibilities as assigned.

Qualifications:

• Bachelor’s Degree and minimum 6 years of prior relevant experience. Graduate Degree and a minimum of 4 years of prior related experience. In lieu of a degree, minimum of 10 years of prior related experience.
• Active adjudicated Top Secret/SCI Clearance is required and ability to obtain a CI Polygraph.
• DoD 8570 IAT Level II certification (e.g., Security+, CySA+, GSEC) is required.
• Relevant computing environment certification (e.g., MCSE, AZ-800, AZ-801) is required.

Preferred Additional Skills:

• Experience supporting mission-critical classified networks and systems.
• Deep knowledge of Active Directory, DNS, DHCP, and Windows authentication mechanisms.
• Proficiency in PowerShell for system management and automation.
• Experience implementing STIGs and securing Windows systems per DISA guidelines.
• Familiarity with virtualization platforms such as VMware vSphere or Hyper-V.
• Experience with system monitoring, event log management, and incident correlation.
• Working knowledge of enterprise endpoint security tools and patch management workflows.
• Ability to design and troubleshoot multi-tier Windows environments and domain trusts.
• Excellent verbal and written communication skills.

In compliance with pay transparency requirements, the salary range for this role in Colorado is $90,500 - $168,500. This is not a guarantee of compensation or salary, as final offer amount may vary based on factors including but not limited to experience and geographic location. L3Harris also offers a variety of benefits, including health and disability insurance, 401(k) match, flexible spending accounts, EAP, education assistance, parental leave, paid time off, and company-paid holidays. The specific programs and options available to an employee may vary depending on date of hire, schedule type, and the applicability of collective bargaining agreements.

#LI-NB1

L3Harris Technologies is proud to be an Equal Opportunity Employer. L3Harris is committed to treating all employees and applicants for employment with respect and dignity and maintaining a workplace that is free from unlawful discrimination. All applicants will be considered for employment without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender (including pregnancy, childbirth, breastfeeding or other related medical conditions), gender identity, gender expression, sexual orientation, marital status, veteran status, disability, genetic information, citizenship status, characteristic or membership in any other group protected by federal, state or local laws. L3Harris maintains a drug-free workplace and performs pre-employment substance abuse testing and background checks, where permitted by law.

Please be aware many of our positions require the ability to obtain a security clearance. Security clearances may only be granted to U.S. citizens. In addition, applicants who accept a conditional offer of employment may be subject to government security investigation(s) and must meet eligibility requirements for access to classified information.

By submitting your resume for this position, you understand and agree that L3Harris Technologies may share your resume, as well as any other related personal information or documentation you provide, with its subsidiaries and affiliated companies for the purpose of considering you for other available positions.

L3Harris Technologies is an E-Verify Employer. Please click here for the E-Verify Poster in English or Spanish. For information regarding your Right To Work, please click here for English or Spanish.