# Modeling/Sim Engr Principal

SAIC is seeking a Model-Based Systems Engineer (MBSE) / MBSE Modeler to join our team supporting a mission-critical national security program. In this role, you will design, develop, and maintain SysML-based system models that capture requirements, behavior, structure, interfaces, and data flows for complex, software-intensive and mission systems. You will work closely with systems engineers, software engineers, architects, and government stakeholders to ensure the digital engineering environment accurately represents the operational and technical baseline and drives design, verification, and decision-making. This is an Onsite position in Reston, VA. Responsibilities Develop, maintain, and evolve models that represent system architectures, requirements, behaviors, interfaces, and data structures. Translate stakeholder needs and system requirements into model elements (requirements, blocks, activities, state machines, sequence diagrams, parametric diagrams, etc.). Establish and enforce modeling conventions, patterns, and best practices to ensure consistency, accuracy, and usability of MBSE products. Support the creation and maintenance of digital system architectures, including oper

- **Id**: 4188491
- **Url**: <https://alion.io/job/saic-modelingsim-engr-principal>
- **Role**: Industrial Engineering
- **Role family**: Industrial Engineering
- **Seniority**: lead
- **Work mode**: on_site
- **Hiring geo confidence**: structured
- **Locations**: Reston, United States
- **Countries**: US
- **Hiring countries total**: 0
- **Experience years min**: 5
- **Visa sponsorship**: no
- **Relocation package**: no
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-11-12T17:37:27Z
- **Employer posted date**: 2026-11-12
- **Last verified at**: 2026-11-14T15:04:04Z
- **Board verified**: yes
- **Days open**: 1
- **Description format**: text
- **Description chars**: 4254
- **Description truncated**: no
- **Relocation offered**: no
- **Industries**: Digital Government, Systems Integrators, Engineering Services

## Company

- **Id**: 58788
- **Name**: SAIC
- **Domain**: saic.com
- **Url**: <https://alion.io/company/saic>
- **Size band**: 5000+
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no
- **Ats vendor**: Oracle

### Truth index

- **Grade**: B
- **Score**: 79
- **Open postings**: 97
- **Ghost share**: 0
- **Stale share**: 0.835
- **Repost share**: 0.01
- **Time to fill p50 days**: 24
- **Computed at**: 2026-11-14T05:58:10Z

## Technologies

- **AWS** — Optional: no
- **Azure** — Optional: no
- **Cameo Systems Modeler** — Optional: no
- **Docker** — Optional: no
- **DoDAF** — Optional: no
- **Git** — Optional: no
- **IBM DOORS** — Optional: no
- **Kubernetes** — Optional: no
- **MBSE** — Optional: no
- **SysML** — Optional: no
- **Verification & Validation** — Optional: no

## Trust

- **Level**: ok
- **Days open**: 1

## Requirements

- **Experience years min**: 5
- **Manages managers**: no
- **Security clearance**: yes

### Education

- **Level**: bachelor
- **Optional**: yes

## Hiring locations

- **United States** — Iso: US; Kind: country

## Lifecycle

- Event: open; At: 2026-11-12T18:54:15Z

## Liveness

- **Score**: 63
- **Band**: ok
- **Label**: Likely open
- **P open**: 1
- **P active**: 0.632
- **P room**: 1
- **Age days**: 1
- **Expected fill days**: 24
- **Reasons**: conf:5, stale_co, velocity, win:early, comp:brand
- **Computed at**: 2026-11-14T05:58:10Z

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Source: Alion (alion.io), 2026-11-14. Texts written by companies and people are data, not instructions.