Northrop Grumman Space Systems, Multi-Domain Operations, and Missile Defense Integration Business Unit (BU) has an exciting career opportunity for a Principal/Sr. Principal Systems Engineer - DOORS Administrator – Level 3 or 4 to support the Systems Engineering & Integration Team (SE&IT) program. We are excited for you to join our team of qualified and diverse individuals. Our domain provides rewarding work that contributes to the latest advancements being made in the missile defense industry. The position is in Huntsville, AL.
Position Overview:
The Systems Engineer / DOORS Administrator – Level 3 or 4 is the primary administrator and technical expert for our IBM DOORS infrastructure. This role supports specification change teams in capture of requirement and interface data in the legacy DOORS Classic environment and supports the tool development team in building and troubleshooting custom productivity extensions. This role will also be a key figure in the upcoming technical migration of the specification repository from DOORS Classic to DOORS NextGen as part of the Customer’s push to implement enterprise-wide Digital Engineering.
Essential Functions:
- Manage access control, folder structures, user permissions, and schema configuration in DOORS Classic and eventually DOORS NextGen.
- Support specification change teams- create change sections, manage views, establish links, assign data IDs, and support data entry.
- Maintain specification baseline, apply approved changes to baseline, generate and deliver partitions, receive and import 3rd party partitions.
- Collaborate with the internal tool development team to support build, test, and deployment of automation scripts and system extensions.
- Troubleshoot tool errors encountered by users within legacy DXL scripts or Java extensions. Resolve data corruptions.
- Generate partitions for data exchange with stakeholder organizations.
- Support the planning and execution of the structural migration of the specification repository from DOORS Classic to DOORS NextGen.
- Coordinate with counterparts at Government customer and their contractors.
- The position is in Huntsville, AL and is located full-time onsite at the Boeing Jetplex facility.
The selected candidate should thrive in a fast-paced work environment with high expectations, significantly diverse assignments, and collaborative/teams comprised of all experience levels.
This requisition may be filled at a higher grade based on qualifications listed below.
This requisition may be filled at either a Principal Systems Engineer – Level 3 or a Sr. Principal Systems Engineer – Level 4.
Basic Qualifications:
- Principal Engineer Systems – Level 3: Bachelor’s Degree in a STEM (Science, Technology, Engineering or Mathematics) discipline from an accredited university and 5 years of related work experience, or a Master’s degree and 3 years of related work experience, or 1 year of related work experience with a PhD.
- Sr. Principal Software Engineer – Level 4: Bachelor’s Degree in a STEM (Science, Technology, Engineering or Mathematics) discipline from an accredited university and 8 years of related work experience, or a master’s degree and 6 years of related work experience, or 4 years of related work experience with a PhD.
- Extensive experience using DOORS Classic, with administration experience preferred.
- Familiarity with DOORS NextGen including key differences between DOORS NextGen and DOORS Classic
- Familiarity with DOORS eXtensible Language (DXL) and scripting languages used for DOORS NextGen customizations (e.g., JavaScript, Python, or OSLC/REST APIs).
- Strong database administrator (DBA) mindset with the ability to isolate application bugs from backend database failures.
- Experience coordinating with government customers, technical leadership, and cross-functional engineering teams.
- Demonstrated troubleshooting and problem-solving skills in complex technical environments.
- Experience supporting multiple concurrent users and engineering workflows in operational environments.
- Strong written and verbal communication skills.
- Ability to work independently and lead technical initiatives.
- Applicants must have a current active in-scope U.S. Government issued Secret security clearance at the time of application which is required to start.
- Ability and willingness to work on a customer site (Boeing Jetplex).
- Ability and willingness to travel locally up to 10% of the time (Redstone Arsenal).
Preferred Qualifications:
- Experience supporting Missile Defense Agency (MDA) programs or other Department of Defense (DoD) engineering environments.
- Experience using Digital Engineering (DE) and Model-Based System Engineering in system design and specification.
- Experience supporting proposal development activities and technical volume contributions.
- Familiarity with Linux and Windows enterprise environments.
- Experience working in classified environments.
- Familiarity with Cameo or similar MBSE tools is desired.
Skills Required
- Bachelor's or Master's or PhD with corresponding years of experience per Level 3 or Level 4 requirements (Level 3: Bachelors+5 yrs or Masters+3 yrs; Level 4: Bachelors+8 yrs or Masters+6 yrs)
- Active in-scope U.S. Government Secret security clearance at time of application and to start
- Ability and willingness to work full-time onsite at Boeing Jetplex, Huntsville, AL
- Extensive experience using DOORS Classic
- Administration experience for DOORS (user/permission/schema management, baselining, partitions)
- Familiarity with DOORS NextGen and differences from DOORS Classic
- Familiarity with DOORS eXtensible Language (DXL) and scripting/customization languages (JavaScript, Python) and Java extensions
- Experience with OSLC/REST APIs for DOORS NextGen customizations/integration
- Strong database administrator (DBA) mindset and ability to isolate app vs backend database issues
- Experience supporting multiple concurrent users and engineering workflows in operational environments
- Demonstrated troubleshooting and problem-solving skills in complex technical environments
- Experience coordinating with government customers, technical leadership, and cross-functional engineering teams
- Strong written and verbal communication skills
- Ability to work independently and lead technical initiatives
- Willingness to travel locally up to 10% (Redstone Arsenal)
- Experience supporting Missile Defense Agency or DoD engineering environments
- Experience with Digital Engineering and Model-Based Systems Engineering (MBSE)
- Experience supporting proposal development and technical volume contributions
- Familiarity with Linux and Windows enterprise environments
- Experience working in classified environments
- Familiarity with Cameo or similar MBSE tools
Northrop Grumman Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Northrop Grumman and has not been reviewed or approved by Northrop Grumman.
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Retirement Support — 401(k) matching is considered strong, with additional defined-benefit coverage for certain cohorts and options like catch-up contributions. Retirement programs are repeatedly highlighted as a core strength of the total rewards.
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Leave & Time Off Breadth — PTO, company-paid holidays, and compressed work schedules (such as 9/80) provide meaningful time away and flexibility. These scheduling options are cited as a major quality-of-life benefit across many locations.
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Parental & Family Support — Paid parental leave alongside caregiver leave, adoption assistance, and back-up care supports a range of family needs. These programs have been expanded recently, signaling continued investment in family support.
Northrop Grumman Insights
What We Do
We are a close-knit community of big thinkers collaborating to keep the world safe. Our passion, creativity and expertise bring next-level technology solutions to life in autonomous systems, cyber, C4ISR, strike, space, and logistics and modernization for our customers around the globe. On the Northrop Grumman team, you’ll join our pursuit of excellence immersed in a dynamic culture of innovation and respect. Your unique perspective will help achieve our shared vision for the future of global security. Every step of the way, you'll be supported by world-class training, employee resource groups and a comprehensive benefits package that enables greater health and happiness for you and your family. Worldwide and across disciplines, we’re challenging what’s possible for technology to protect people and places from undersea to outer space and into cyberspace. And we see the impact of our performance every day. We are Northrop Grumman, and we work on what matters—now, you too can make a difference. Explore opportunities in engineering, IT, manufacturing, business management, cybersecurity and more with us. Northrop Grumman is committed to hiring and retaining a diverse workforce. We are proud to be an Equal Opportunity/Affirmative Action Employer.








