RTX · 20 hours ago
Sr. Principal System Administrator
US-AZ-TUCSON-805 ~ 1151 E Hermans Rd ~ BLDG 805
Full-time
Onsite
Senior Level, Lead/Staff
$108K/yr - $204K/yr
8+ years expRTX is a leading company dedicated to helping the nation and allies defend freedoms and deter aggression through advanced technology solutions. They are seeking a Sr. Principal System Administrator to support critical programs with classified information system capabilities, focusing on developing and maintaining secure IT environments and collaborating with various teams to define computing requirements.
AerospaceManufacturingSecuritySensorTelecommunications
No H1B
Security Clearance RequiredU.S. Citizen Only
Responsibilities
Provide IT systems administration in a heterogeneous Microsoft Windows and Red Hat Enterprise Linux environment
Understanding and knowledge of Windows Server to include but not limited to Active Directory, Group Policy, & DNS
Advanced Red Hat Enterprise Linux knowledge
Working as a team member in a fast-paced technological environment. Use troubleshooting techniques to resolve technical problems of a moderate to high scope and complexity to include the integration of hardware and operating systems (OS)
Experience with data RAID, data encryption, and data backup uses and technologies
Install and configure software applications requested by end users
Work with Cybersecurity professionals to maintain security requirements and provide documentation and training on advanced IT processes and procedures and other tasks as assigned
Must be able to obtain Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent certification) within 6 months of start date
Must be able to develop solutions and documentation a variety of technical problems
Systems are operational 24x7 and occasionally require work effort beyond standard work hours
Travel is required to other US Domestic locations as business needs dictate up to 5% travel
Qualification
Required
Typically requires a bachelor's degree and a minimum of 8 years of prior relevant experience, or an advanced degree and 5 years of direct experience
Active and transferable U.S. government issued top secret security clearance is required prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance
Experience with Linux and Windows
Must have experience with leading or mentoring others
Active and existing security clearance required on day 1
Must be able to obtain Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent certification) within 6 months of start date
Preferred
Strong leadership, teamwork, communication (written and oral), collaboration, and organizational skills
Deep experience with Red Hat Enterprise Linux (RHEL) and its ecosystem, including authentication and identity services (SSSD, LDAP, Kerberos, NIS) and file sharing/integration services (Samba, NFS)
Expertise with automation and configuration management tools such as Ansible and Red Hat Satellite, along with strong scripting skills in Bash, Python, Perl, or C to support provisioning, patching, and lifecycle management
Familiarity with enterprise storage systems (e.g., NetApp) and virtual desktop infrastructure (VDI) technologies such as Horizon, Profile Unity, and NVIDIA GPU virtualization (NLS, DLS)
Proficiency with monitoring, vulnerability scanning, and compliance assessment tools (ACAS, Splunk, Nessus, SCAP, STIG, Nagios, SolarWinds) and working knowledge of security frameworks (CMMC, NISPOM, JAFAN, JSIG, DFARS, DoD RMF)
Benefits
Medical
Dental
Vision
Life insurance
Short-term disability
Long-term disability
401(k) match
Flexible spending accounts
Flexible work schedules
Employee assistance program
Employee Scholar Program
Parental leave
Paid time off
Holidays
Company
RTX
RTX is comprised of three market-leading businesses – Collins Aerospace, Pratt & Whitney and Raytheon – working as one to answer the biggest questions and solve the hardest problems in aerospace and defense.
10001+ employees
Funding
Current Stage
Public CompanyTotal Funding
$3.2MKey Investors
LIFT Ecosystem Accelerator
2024-02-22Grant· $0.2M
2019-06-09Acquired
2010-01-14Grant· $3M
Leadership Team
Daniel Conroy
Chief Technology Officer - Digital
Kevin DaSilva
Corporate Vice President & Treasurer
Recent News
bloomberglaw.com
2026-01-22
Business Insider
2026-01-09
Company data provided by crunchbase