Sr. System Administrator

Kratos Defense; Crane (IN); On-site; USD 90,000 - 130,000; Full time

Benefits offered by this job

Life/AD&D & Disability Insurance

401(k) Savings Plan

Employee Stock Purchase Plan (ESPP)

Paid Time-Off (PTO)

Holidays

Education Reimbursement

Job summary

Kratos Defense & Security Solutions, Inc. is seeking a Systems Administrator to manage complex Windows and Linux environments, enforce cybersecurity practices, and ensure reliability across networks. The role requires DoD-style experience, strong AD skills, and automation expertise.

The ideal candidate will hold a related degree, 5–7 years of experience, and active SECRET clearance with potential for TOP-SECRET access. This is an on-site position supporting DoD-aligned infrastructure.

Qualifications

• Bachelor’s degree in IT, CS, Cybersecurity, or related field; Master’s degree preferred.
• Minimum 5–7 years as a Systems Administrator or similar.
• Expertise with Windows Server (2012R2–2025) and Active Directory administration.
• Strong PowerShell automation and system management skills.
• Experience managing enterprise GPOs, DNS, DHCP, ADFS, ADMT, and MS infrastructure services.
• Understanding of cybersecurity frameworks (DoD STIGs, Zero Trust, etc.).
• Experience with Linux administration, automation tools, and Ansible playbooks.
• Strong troubleshooting across servers, networks, storage, and applications.

Responsibilities

• Administer and maintain Active Directory environments (users, groups, GPOs).
• Manage AD CS, certificate templates, and authorities.
• Maintain Windows Server environments, patching and updates.
• Troubleshoot complex system, app, and network issues across distributed envs.
• Collaborate with vendors and stakeholders to design technical solutions.
• Support IT operations with imaging, automation, and system configuration ( MDT, WDS, PowerShell, Ansible).
• Implement and maintain cybersecurity controls per ISSM/ISSO guidance.
• Support Linux servers (RHEL, Rocky, CentOS, Ubuntu) including scripting and automation.
• Manage backup solutions and networking using Cisco tech.

Skills

Active Directory

PowerShell

Ansible

Linux administration

Windows Server

AD CS

PKI & certificates

DoD 8570/8140

cybersecurity frameworks

Education

Bachelor’s degree in IT/CS/C cybersecurity

Master’s degree preferred

Tools

MDT/WDS

DNS/DHCP/ADMT

Azure

Cisco networking

Nutanix AHV

Job description

This role is responsible for managing complex Windows and Linux environments, implementing cybersecurity best practices, and ensuring reliability and security across networks. The ideal candidate has deep technical expertise, experience working in regulated or high-security environments, and a strong background in Active Directory, automation, and enterprise systems management. This is an on-site position.

Essential Job Functions

• Administer and maintain Active Directory environments, including users, groups, Group Policy Objects, and Advanced Group Policy Management.
• Manage and configure AD Certificate Services (AD CS), certificate templates, and certificate authorities.
• Ensure compliance with security standards and policies.
• Manage Windows Server environments including patching and updates.
• Troubleshoot complex system, application, and networking issues across distributed environments.
• Collaborate with vendors, customers, and internal stakeholders to design and implement technical solutions.
• Support IT operations including imaging, automation, and system configuration using MDT, WDS, PowerShell, and Ansible.
• Implement and maintain cybersecurity controls per ISSM and ISSO guidance.
• Support Linux server environments (RHEL, Rocky, CentOS, Ubuntu), including shell scripting and automation.
• Manage backup solutions.
• Support networking environments using Cisco technologies.

Other Job Functions

• Other duties as assigned.

Experience and Skills

Knowledge, Skills, and Abilities Required:

• Strong communication skills, strong critical thinking and problem-solving skills; self-motivated with ability to effectively prioritize multiple projects; ability to work with people in a team environment and deal effectively with changing project priorities.
• Ability to manage time, make sound decisions, take independent action, analyze problems and provide focused solutions.
• High degree of attention to detail.
• Must have active in-scope SECRET clearance and be able to obtain a TOP-SECRET clearance and maintain access to Sensitive Compartmented Information (SCI) and/or any necessary Special Access Programs (SAP).
• DoDM 8140/DoD 8570 approved (Technician Level 2-3) certification required within 6 months of hire.

Education and Experience

• Bachelor’s degree in IT, Computer Science, Cybersecurity, or related field; Master’s degree preferred.
• Minimum 5–7 years of experience as a Systems Administrator or similar role.
• Expertise with Microsoft Windows Server (2012R2–2025) and Active Directory administration.
• Strong proficiency with PowerShell for automation and system management.
• Experience managing enterprise GPOs, DNS, DHCP, ADFS, ADMT, and Microsoft infrastructure services.
• Understanding of cybersecurity frameworks (DoD STIGs, Zero Trust, etc.).
• Experience with Linux administration, automation tools, and Ansible playbooks.
• Strong troubleshooting skills across servers, networks, storage, and applications.

Preferred Experience

• Experience with Microsoft Azure and secure DoD?aligned cloud deployments.
• Familiarity with Cisco Catalyst, SD?WAN, and Palo Alto.
• Hands-on experience with Nutanix AHV and Prism Central.

#LI-ACI

#LI-Onsite

• Life/ADD & Short/Long Term Disability Insurance
• 401(k) Savings Plan
• Employee Stock Purchase Plan (ESPP)
• Paid Time-Off (PTO)
• Holidays
• Education Reimbursement

Kratos Defense is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race,color, religion, sex, sexual orientation, gender identity, national origin, age, pregnancy, genetic information, disability, status as aprotected veteran, or any other protected category under applicable federal, state, and local laws.

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