Top 340 Data scientist Jobs in Loudoun County Va

Principal Data Scientist - AI Trainer
DataAnnotation —Chantilly, VA
- $50 - $100 an hour
- Part-time
- Remote
- Computer Science
- English
- 3 years
- Flexible schedule
Quick Apply
10d
Computational Scientist - AI Trainer
DataAnnotation —Manassas, VA
- $50 - $100 an hour
- Part-time
- Remote
- Computer Science
- Writing skills
- English
- Flexible schedule
Quick Apply
6d
Senior Data Scientist
Leidos —Chantilly, VA
- $154,050 - $278,475 a year
- Full-time
- Computer Science
- 11+ years
- Bachelor's degree
Senior Data Scientist
SOSi —Chantilly, VA
- $102,414 - $212,706 a year
- Full-time
- Computer Science
- Mid-level
- Office
Quick Apply
Data Scientist
Quantoknack —Ashburn, VA
- Mid-level
- Analysis skills
- Communication skills
Data Scientist
VivusTech —Chantilly, VA
- Mid-level
- Bachelor's degree
- Mentoring
Data Scientist - All Levels
Interclypse, Inc. —Reston, VA
- Computer science
- Azure
- Computer Science
- Paid jury duty
- Health savings account
Data Scientist
Deltek, Inc. —Herndon, VA
- $76,000 - $134,000 a year
- Call employer
- Remote
- Azure
- Computer Science
- Mid-level
- Paid holidays
- Disability insurance
1d
Senior Software Engineer / Data Scientist (Training Systems)
Leidos —Chantilly, VA
- $154,050 - $278,475 a year
- Full-time
- Computer Science
- System design
- 8 years
Sr Data Scientist, NPV Modeling
PenFed Credit Union —McLean, VA
- $84,700 - $172,907 a year
- Overtime
- Office
- Master's degree
- SQL
- Paid parental leave
- Disability insurance
Senior Data Scientist - Operational Analytics
Peraton —Herndon, VA
- $104,000 - $166,000 a year
- Computer Science
- Bachelor of Science
- 8 years
- Health savings account
- Paid holidays
Data Scientist - AI Trainer
DataAnnotation —Manassas, VA
- $50 - $100 an hour
- Part-time
- Remote
- Writing skills
- English
- Mid-level
- Flexible schedule
Quick Apply
AI/ML Decision Intelligence Lead
Peraton —Herndon, VA
- $146,000 - $234,000 a year
- Bachelor of Science
- System design
- 11+ years
- Health savings account
- Paid holidays
Technical Lead, GenAI & Automation Engineering (Risk Engineering)
Freddie Mac —McLean, VA
- $146,000 - $218,000 a year
- Full-time
- Azure
- Computer Science
- 5 years
Financial Model Development Senior (Python Developer)
Freddie Mac —McLean, VA
- $130,000 - $196,000 a year
- Full-time
- Computer Science
- 5 years
- Office
AI Engineer Topsecret Clearance
Lambentwit technologies —Dulles, VA
- $175,000 - $225,000 a year
- Email
- Azure
- Computer Science
- System design
- Health savings account
- Dental insurance
Quick Apply
Senior Software Engineer (Gen AI)
Freddie Mac —McLean, VA
- $129,000 - $193,000 a year
- Full-time
- Computer science
- Azure
- Computer Science
AI / ML Engineer
Accenture Federal Services —Chantilly, VA
- $120,500 - $221,800 a year
- Mid-level
- SQL
- Bachelor's degree
Data Scientist/Sustainment Engineer
CACI —Chantilly, VA
- $103,800 - $218,100 a year
- Full-time
- Azure
- Computer Science
- 5 years
- Health insurance
Artificial Intelligence Engineer
CACI —Ashburn, VA
- $103,800 - $218,100 a year
- Full-time
- Hybrid work
- 7 years
- Computer Science
- Bachelor of Science
- Health insurance

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data scientist jobs near loudoun county va

Principal Data Scientist - AI Trainer

DataAnnotation -
Chantilly, VA

Quick Apply

Job Details

Part-time | Full-time | Contract
$50 - $100 an hour
10 days ago

Benefits

Flexible schedule

Qualifications

Software coding
Design of experiments
English
Providing code feedback

Full Job Description

DataAnnotation is committed to creating quality AI. Help train AI chatbots while gaining the flexibility of remote work and choosing your own schedule.

We are looking for an existing Principal Data Scientist - AI Trainer to help train AI models. AI models are increasingly capable of performing complex analytical and scientific reasoning — but these systems still need practitioners with real-world quantitative experience to validate whether the outputs actually hold up in practice. That's where you come in.

You'll work closely with state-of-the-art AI models on tasks like evaluating AI-generated quantitative analysis, solving technical problems, and providing feedback that directly shapes how these systems reason about data, models, and scientific problems. Whether your background is in data science, astrophysics, economics, biostatistics, operations research, or any other quantitative field, if you think rigorously about data and models, your skills are directly applicable here. You can fit this work alongside a full-time role, or treat it as your primary focus, choosing projects and schedules that align with your availability and goals.

To get started, once you sign up for an account, you'll take a short assessment (this serves as our version of an interview). If you pass, you'll receive an email confirmation, and paid work will become available on our platform.

Advantages of contracting with us:

Fully remote: work from anywhere in the US, Canada, UK, Ireland, Australia, and New Zealand.
Flexible schedule: choose which projects you take on and when you work, on your own computer, from the comfort of your own home.
Competitive pay: projects are paid hourly at $50 to $100 USD per hour, with bonus rates available on some projects.
Impact: help shape the future of AI systems built to reason about data and analytics.

Responsibilities:

Evaluate AI-generated quantitative work, including statistical analysis, predictive modeling, scientific reasoning, and data-driven insights, for technical accuracy and real-world validity.
Design and solve quantitative problems used to train and benchmark AI systems, spanning areas like forecasting, experimental analysis, optimization, and statistical inference.
Write clear technical explanations and well-documented analytical code.
Provide feedback that directly shapes the next generation of AI models built for quantitative reasoning.

Qualifications:

3+ years of hands-on experience in a quantitative role or research environment — such as data science, statistics, economics, finance, physics, biology, epidemiology, operations research, or any adjacent field.
Some coding experience required, with comfort writing and reviewing analytical code end-to-end.
Practical experience with statistical methods, predictive modeling, and experiment design (e.g., A/B testing, hypothesis testing, regression, classification, time-series forecasting).
Fluency in English (native or bilingual level) with strong writing skills.
A bachelor's degree in a quantitative field preferred (Statistics, Computer Science, Mathematics, Engineering, or similar); an advanced degree (Master’s or PhD) is a plus.
Relevant credentials are a plus (e.g., Kaggle Competition ranking, AWS/GCP ML certifications, or equivalent demonstrated expertise).

Note: Payment is made via PayPal. We will never ask for any money from you. This job is only available to those in the US, Canada, UK, Ireland, Australia, and New Zealand.

Quick Apply

Refine Your Search

data scientist jobs in loudoun county va

Principal Data Scientist - AI Trainer

Computational Scientist - AI Trainer

Senior Data Scientist

Senior Data Scientist

Data Scientist

Data Scientist

Data Scientist - All Levels

Data Scientist

Senior Software Engineer / Data Scientist (Training Systems)

Sr Data Scientist, NPV Modeling

Senior Data Scientist - Operational Analytics

Data Scientist - AI Trainer

AI/ML Decision Intelligence Lead

Technical Lead, GenAI & Automation Engineering (Risk Engineering)

Financial Model Development Senior (Python Developer)

AI Engineer Topsecret Clearance

Senior Software Engineer (Gen AI)

AI / ML Engineer

Data Scientist/Sustainment Engineer

Artificial Intelligence Engineer

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