1,920,112open jobs
112,656companies
248,879added this week
Browse all
Salary
≈ $65k – $117k per year (Estimated)
Location
In office (Chantilly)
Seniority
Junior · 2+ years exp
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 22, 2026. First seen by Alion on Oct 21, 2026. APEX TK scores B on the Alion truth index.

Overview
Company
Impact
Profile match
Systems engineering and acquisition expertise for complex defense programs, with custom AI and machine learning solutions built by the practitioners who do the.

APEX TK is seeking a highly motivated and skilled Modeling & Simulation Engineer to join our team supporting a critical government client. This position offers the opportunity to work on cutting-edge projects within the aerospace domain.

Responsibilities:

  • Define modeling requirements from user needs and system architecture and develop scripts to automate scenario modeling and performance analysis.
  • Perform advanced modeling related to orbital mechanics (orbit determination, orbital maneuvering, and spacecraft flight dynamics) and/or sensor phenomenology (optics/radar/RF)
  • Use and develop cutting-edge modeling and simulation tools and algorithms to help address some of the most challenging issues regarding Space Situational Awareness (SSA) for the Intelligence Community (IC) and Department of Defense (DOD)
  • Develop code / scripts to develop algorithms, perform analyses, and automate data processing to model space conflict scenarios for system evaluation and mission effectiveness
  • Work in a collaborative team environment studying and analyzing a wide variety of interesting and complex problems in the Space domain
  • Incorporate phenomenological modeling principles into relevant models and simulations.

Required Qualifications:

  • 2-10 years of relevant experience.
  • Bachelor’s Degree in a STEM related field such as Engineering, Mathematics, Physics, Aerospace, Computer Science, etc.
  • Active Top Secret/SCI w/ CI Poly Clearance
  • Experience performing space-related engineering analysis (collecting, organizing, analyzing data) using one or more of the following: C++, Python, R, SQL, PostgreSQL, Linux, MATLAB, VBA, or STK
  • Ability to communicate findings and recommendations to internal and external customers
  • Solid understanding of orbital mechanics and space systems.
  • Experience with phenomenological models, including a demonstrated ability to model relevant physical phenomena and validate those models.

Preferred Qualifications:

  • Master's degree in a STEM related field.
  • Experience with other simulation tools and programming languages.
  • Experience with non-cooperative target tracking.
  • Experience with collection & revisit modeling.
  • Knowledge of cloud computing platforms (e.g., AWS, Azure).
Free account
Stop reading job ads. Get the ones that fit.
One free account turns this page into a shortlist built around your stack, your level and your pay.
Match on every job. Stack, seniority, pay and location, scored against your profile.
1,920,112 open roles. Read straight off company career pages, refreshed every day.
Unlimited applications. Every one you send is tracked in one place, on-site or on a company board.
3 tailored CVs a month. Rewritten for the exact job you are applying to. Included free.
Create a free account Continue with Google
Free forever. No card. Under a minute.

Your match

How well do you fit this role?
Two answers are enough for a real match. No account needed.
Check my fit
Answers stay in this browser until you create an account.

Recommended for you based on this role

Industrial Engineering
Similar stack
Same company
Chantilly
≈ $54k – $98k per year (Estimated) • In office • 2+ years exp • Cranston
Apply
$70k – $90k per year • In office • 2+ years exp • Bachelor's Degree • Santa Fe Springs
Apply
$59k – $60k per year • In office • 2+ years exp • Bachelor's Degree • Savannah
Apply
≈ $56k – $100k per year (Estimated) • Hybrid • Full-Time • Bachelor's Degree • King of Prussia
Life Sciences
GMP
Apply
Trades I - HVAC 1 hour ago
$38k per year • In office • Full-Time • 1+ year exp • Orlando
Apply
≈ $17k – $48k per year (Estimated) • In office • Full-Time • 10+ years exp • Bachelor's Degree • Bengaluru
Python
SQL
Databases
Databricks
Amazon Redshift
AI/ML
LangGraph
LangChain
MLFlow
Scikit-learn
AI Agents
PyTorch
RAG
Feature Store
Human-in-the-Loop
Agentic Workflows
Multi-Agent Systems
Machine Learning
DevOps
AWS
Self-Healing
Amazon EC2
Amazon S3
Analytics
ETL/ELT
AWS Glue
Apply
≈ $24k – $47k per year (Estimated) • In office • Full-Time • 6+ years exp • South Africa
Python
SQL
Analytics
Tableau
Power BI
ETL/ELT
Looker
Apply
≈ $27k – $70k per year (Estimated) • In office • Full-Time • 7+ years exp • South Africa
Python
SQL
Python
Pydantic
AI/ML
Vertex AI
Function Calling
AI Agents
LLM
OpenAI
Anthropic
Structured Outputs
EU AI Act
Prompt Caching
DevOps
Azure
CI/CD
Docker
Cybersecurity
GDPR
Least Privilege
QA
Pytest
Apply
≈ $36k – $86k per year (Estimated) • In office • Full-Time • 7+ years exp • Bachelor's Degree • Hangzhou
Python
SQL
C#
Apply
≈ $81k – $152k per year (Estimated) • Hybrid • 5+ years exp • Bachelor's Degree • Irving
SQL
IoT
OPC UA
Apply
≈ $89k – $168k per year (Estimated) • In office • TS/SCI • Full-Time • 20+ years exp • Bachelor's Degree • Fort Belvoir
Defense
AFSIM
Apply
≈ $72k – $131k per year (Estimated) • In office • TS/SCI • Full-Time • 3+ years exp • Bachelor's Degree • Fort Belvoir
Defense
AFSIM
Apply
≈ $67k – $122k per year (Estimated) • In office • TS/SCI • Full-Time • 3+ years exp • Bachelor's Degree • Huntsville
Analytics
Tableau
Power BI
QlikSense
Microsoft Excel
SpaceTech
Cameo Systems Modeler
Apply
≈ $90k – $171k per year (Estimated) • In office • Secret • Full-Time • 7+ years exp • Bachelor's Degree • Huntsville
Python
C++
MATLAB
AI/ML
SciPy
Pandas
NumPy
Analytics
Matplotlib
Apply
MBSE Engineer 1 month ago
≈ $86k – $162k per year (Estimated) • In office • Secret • Full-Time • 7+ years exp • Huntsville
Python
MATLAB
MATLAB
Simulink
Management
Confluence
Jira
SpaceTech
SysML
Cameo Systems Modeler
IBM DOORS
MBSE
Defense
DoDAF
Apply
VDI Engineer 2 days ago
≈ $82k – $192k per year (Estimated) • In office • TS/SCI • Chantilly
Apply
$100k – $150k per year • In office • TS/SCI • Full-Time • 5+ years exp • Bachelor's Degree • El Segundo • Chantilly • Colorado Springs
Python
C++
Apply
$87k – $130k per year • In office • TS/SCI • Full-Time • 3+ years exp • Bachelor's Degree • El Segundo • Chantilly • Colorado Springs
Python
C++
Apply
$117k – $176k per year • In office • TS/SCI • Full-Time • 8+ years exp • Bachelor's Degree • El Segundo • Chantilly • Colorado Springs
Apply
In office • Top Secret • 10+ years exp • Bachelor's Degree • Chantilly
Python
AI/ML
MLFlow
Vertex AI
Embeddings
Reinforcement Learning
Scikit-learn
Prompt Engineering
Computer Vision
AI Agents
NLP
TensorFlow
PyTorch
LLM
RAG
Machine Learning
DevOps
GCP
Azure
CI/CD
AWS
Docker
Kubernetes
Apply
See all jobs
This is one of many
1,920,112 more open roles from verified company boards, updated every day.