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STR

Senior Data Scientist

STR · Arlington, VA

Posted 29 days ago · $140,000 - $190,000

or apply directly on STR's site. We never take the application ourselves.

Is this posting real?

This role has been open
29 days
STR's roles stay open a median of 45 days
Reposted
No
Salary listed
Yes
99% of STR's roles list one
Ghost-job risk at STR
high
100 stale, 0 reposted of 139 open
Hiring momentum
215 roles opened in the last 90 days
↑ up vs. the prior 90 days
Last confirmed on the employer's board
2026-09-17

Measured from postings appearing on and disappearing from STR's own greenhouse board since 2026-08-03. Full hiring picture for STR.

About this role

As a Senior Data Scientist at STR, you will work on developing and integrating advanced machine learning models and technologies to address critical national security challenges. Your role involves analyzing complex datasets to uncover patterns and insights, collaborating with multidisciplinary teams, and engaging with customers to understand their needs and communicate findings. You will utilize a variety of quantitative models and AI/ML methods in a hands-on, impactful environment.

Our read on this posting3.6out of 5
benefits
1/5
freshness
4/5
career value
4/5
role clarity
4/5
pay transparency
5/5

Scored from the posting itself — how clearly the role is described, how much it says about pay and benefits, and how recently it was listed. Not a judgement of STR as an employer.

What you need

  • Active Secret security clearance
  • MS degree with 3+ years of experience, and/or PhD in Statistics, Data Science, Applied Mathematics, Computer Science, Physics or other related discipline (or equivalent experience)
  • Experience developing and applying AI/ML methods to real-world data science problems
  • Familiarity with various algorithmic techniques such as Bayesian methods, predictive models, reinforcement learning, deep learning architectures, and large language models
  • Proficient with Python and the traditional data science and machine learning stack, including NumPy, Pandas, scikit-learn, PyTorch, and matplotlib
  • Demonstrated ability to collaborate effectively within cross-functional teams and communicate with customers and end users

Nice to have

  • Familiarity with geospatial and/or spatiotemporal data
  • Demonstrated ability to conduct and lead research tasks amidst uncertain conditions with minimal oversight
  • Experience working with large datasets (> 100 GB) and familiarity with big data infrastructure and frameworks such as AWS, Hadoop, Spark, Dask, or MapReduce
  • Solid understanding of software engineering principles, including testing, scalability, observability, maintainability, and performance optimization
  • Active Top Secret security clearance

What you get

  • Full-Time Salary Range: $140,000 - $190,000

Worth weighing

  • Position requires active security clearance, which may limit applicant pool
  • Expectation to work primarily onsite
  • Role involves high-impact national security problems, which may come with unique challenges and pressures

Summarised from STR's posting. Read the full original.

Listed by STR on their greenhouse job board, last confirmed open on 2026-09-17. PitchMeAI is not the employer.

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