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Modern Technology Solutions Inc

Lead System Architect

El Segundo, CA, United States
El Segundo, United States

On-site

$116,000 to $157,000 USD / year

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Job details

Pay: $116,000 to $157,000 USD / year
Workplace: On-site
Apply by: May 8, 2027
Posting language: English
Posted: Nov 9, 2026

Original job description

Modern Technology Solutions, Inc. (MTSI) is seeking a Lead System Architect to join our team in El Segundo, CA.

The MILSATCOM Systems Engineering, Integration and Test (MSEIT) team in support of Space Systems Command (SSC) in El Segundo is seeking an individual to provide requirements development and management support for the Military Satellite Communications (MILSATCOM) Capability area. The MILSATCOM portfolio of programs has an ongoing need for IA/Cybersecurity support, to meet the needs of our emerging next-generation protected SATCOM.

The MSEIT contract provides leading-edge Systems Engineering & Integration (SE&I) support for the U.S. Space Force’s SSC. We support the Space Force’s acquisition of state-of-the-art MILSATCOM systems, providing global secure, survivable, and protected communications for our nation’s warfighters. We seek technical individuals who will thrive in a highly collaborative work environment of small teams, using the most modern tools and methodologies to tackle the challenges of integrating complex space and ground communications systems.

Key Responsibilities:

Serve as the Lead System Architect for MBSE, providing technical leadership, direction, and oversight for system modeling activities across the program.
Develop and maintain the program's MBSE strategy, modeling approach, architecture, governance, and roadmap in alignment with program systems engineering objectives and Digital Engineering initiatives.
Define and maintain the overall model architecture, including model organization, decomposition, viewpoints, relationships, naming conventions, modeling standards, and modeling patterns.
Lead development and maintenance of integrated system models representing system architecture, requirements, behaviors, functions, interfaces, verification relationships, and other elements of the technical baseline.
Establish and maintain traceability between mission needs, operational capabilities, system architecture, requirements, interfaces, verification activities, and supporting engineering artifacts.
Define the approach for integrating and, where appropriate, federating models and engineering data produced by government organizations, development contractors, support contractors, and other stakeholders.
Evaluate contractor-developed models and modeling approaches for consistency with program architecture, requirements, technical baseline objectives, and established modeling standards.
Manage the configuration of a Teamwork Cloud database employing multiple Project Usages.
Manage the data connectivity between Cameo System Modeler and IBM Rational DOORS.
Work closely with requirements engineers to establish and maintain relationships and traceability between modeled architecture and authoritative system requirements.
Work with interface engineering teams to ensure system interfaces, logical and physical connections, exchanges, and dependencies are consistently represented within the model.
Work with verification and test organizations to incorporate verification methods, relationships, evidence, and system behavior into the modeling environment as appropriate.

Work Environment:

Location: On-site
Travel Requirements: Minimal
Working Hours: Standard

Qualifications:

Required:

Active Secret clearance required with eligibility for TS/SCI
Bachelor’s degree in engineering, computer science, or related technical field.
5+ years of experience in satellite systems, spacecraft development, or aerospace engineering.
Demonstrated experience leading MBSE efforts for complex systems.
Strong working knowledge of systems engineering principles across architecture, requirements, interfaces, verification, validation, and configuration management.
Demonstrated experience developing and managing complex system models using SysML.
4 years hands-on experience with Cameo Systems Modeler/MagicDraw or comparable enterprise MBSE environments.
Experience developing model structures, modeling conventions, viewpoints, relationships, and reusable modeling patterns.
Experience establishing traceability among system architecture, requirements, interfaces, behaviors, and verification information.
Experience with model configuration management, baselining, version control, and model governance.
Ability to assess complex system models for technical completeness, consistency, and quality.
Ability to translate engineering concepts and system relationships into coherent model structures supporting technical decision-making.
Demonstrated ability to coordinate technical activities across multidisciplinary engineering teams and organizations.

Preferred Skills and Experience:

TS/SCI clearance
8+ years of systems engineering experience, preferably supporting space, ground, or integrated space/ground systems.
3 years experience serving as an MBSE Lead, Lead System Architect, Chief Modeler, or equivalent technical leadership role.
Advanced experience with Cameo Systems Modeler/MagicDraw, SysML, model libraries, profiles, and model governance.
Experience integrating MBSE environments with requirements management, configuration management, test/verification, or other engineering-data environments.
Experience with system-of-systems modeling and integration of complex space and ground architectures.
Familiarity with DoD architecture and Digital Engineering approaches.
Experience facilitating model-based technical reviews with government and industry stakeholders.
INCOSE CSEP or ESEP certification, or similar systems engineering certification.
Object Management Group Certified Systems Modeler Professional (OCSMP) Level 1 or higher

Compensation: The pay range for this position in California is $125,000/year to $157,000/year and for Colorado is $116,000/year to $145,000/year; however, base pay offered may vary depending on established government contract ranges, job-related knowledge, skills, and experience, and other factors. MTSI also offers a full range of medical, financial, and other benefits, dependent on the position offered. Base pay information is based on market location. Applicants should apply via MTSI's internal or external careers site.

#MTSI #MTSIJOBS #MSEIT

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Skills

Leadership
Teamwork
IBM Rational DOORS
Computer science
Aerospace engineering
Engineering principles
Decision making

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