ManTech seeks a motivated, career and customer-oriented **Senior Principal ServiceNow Developer** to join our team in **Denver, CO or Chantilly, VA.** **Responsibilities include but are not limited to:** + Develops ServiceNow solutions and enhancements using core platform capabilities + Develops the applications including configuration, report development and data migration, where applicable + Identifies and implements best-practice solutions to address client requirements + Performs custom development and 3rd party integrations + Performs unit-testing and resolves code defects + Migrates code changes to the production environment + Collaborates with internal stakeholders and team members to build solutions in ServiceNow that support business requirements **Minimum Qualifications:** + Bachelor’s degree or 4+ years of additional software development experience in lieu of degree + 10+ years of experience with software development + 2+ years of experience working on a large and complex software development project + Experience with developing Service Catalog and ServiceNow workflows + Experience with one scripting language (Ruby, Python, Perl, Bash, JavaScript) + DoD Approved 8570 IAT Level II Certification (e.g. Security+ CE) **Preferred Qualifications:** + Certified ServiceNow Administrator (CSA) **Clearance Requirements:** + Must have a current/active TS/SCI w/Polygraph **Physical Requirements:** + The person in this position must be able to remain in a stationary position 50% of the time. Occasionally move about inside the office to access file cabinets, office machinery, or to communicate with co-workers, management, and customers, via email, phone, and or virtual communication, which may involve delivering presentations. ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran. If you are a qualified individual with a disability and require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please email us at careers@mantech.com and provide your name and contact information.