Data Scientist

Vienna, VA

Criterion Systems seeks a Data Scientist to support our McLean, VA customer. Responsibilities include working directly with the Customer and other stakeholders to establish working data sets, configurations, and profiles to support metrics analysis. In addition,you will also be responsible for design and implementation of advanced design configurations for complex datasets. As part of your task, you will compile data analysis and reporting needs using deployed tools, and collaborate closely with the Customer and other stakeholders to stay current/abreast of changes with current enterprise metadata collection tools.

Mandatory Skills:

  • Demonstrated experience using the scripting language, Python.
  • Demonstrated experience with analytic methods and methodological tools in one or more of the following areas: applied mathematics, probability and statistics, and data modeling.
  • Demonstrated experience using Microsoft Excel for data manipulation, using formulas, look ups, pivot tables.
  • Demonstrated experience with SQL in Oracle.
  • Demonstrated experience translating complex, technical findings into a narrative (i.e. tell a story with the data in graphical, verbal, or written form).
  • Demonstrated experience working with diverse data types.
  • Demonstrated experience with version control systems, such as GitHub.
  • Demonstrated knowledge or experience with data science techniques or formal data science training.
  • Must have an active TS/ISSA clearance walking in the door - No Exceptions.
  • US Citizenship required.

Certification Requirements:

  • N/A

Optional Skills:

  • Demonstrated experience with developing data visualizations.
  • Demonstrated experience with creative problem solving skills to address procedural and administrative issues within the assigned problem set.
  • Demonstrated experience with web analytics processing and procedures.
  • Demonstrated familiarity with Amazon Web Services infrastructure and its native data science capabilities.



Criterion offers comprehensive health benefits including medical, dental, vision, life and disability insurance. Most of our plans are available at no cost for employee only coverage.

Time Off

Employees begin accruing PTO at 15 days per year and acquire more based on seniority. In addition to PTO, Criterion provides 10 holidays and bereavement, military, jury duty, and family medical leave.


  • Roth and Traditional 401(k) Plans with company matching contributions
  • Health Care and Dependent Care Flexible Spending Accounts
  • Health Savings Accounts
  • Commuter Benefits


All employees are eligible to use up to $3,000 annually for approved professional development, including trainings, memberships, seminars, and degree programs.

Employee Testimonials

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Equal Employment Opportunity and Affirmative Action Employer

Criterion Systems, Inc. is committed to equal employment opportunity and non-discrimination at all levels of our organization. We believe in treating all applicants and employees fairly and make decisions without regard to an individual’s protected status: race/ethnicity, color, national origin, ancestry, sex/gender, gender identity/expression, sexual orientation, marital/parental status, pregnancy/childbirth or related conditions, religion, creed, age, disability, genetic information, veteran status, or any other protected status.

Know Your Rights

Applicants have rights under Federal Employment Laws: Family and Medical Leave Act | Equal Employment Opportunity | Employee Polygraph Protection Act. Criterion participates in E-Verify. Review Right to Work information.

Need an Accommodation?

Criterion is committed to Equal Employment Opportunity and providing reasonable accommodations to applicants with physical and/or mental disabilities. If you are interested in applying for a position with Criterion and need special assistance or an accommodation to apply, please send an email with your request to or call us at 703-942-5800. Determination on requests for reasonable accommodation are made on a case-by-case basis.