ManTech seeks a motivated, career and customer-oriented **Principal Cyber Support Developer** to join our team in **Denver, CO or Chantilly, VA.** **Responsibilities include but are not limited to:** + Write production backend applications + Ship and run services in cloud environments, with a focus on AWS + Compile and analyze data, processes, and code to troubleshoot problems + Identifies and implements best-practice solutions to address client requirements + Performs operational support of custom development and 3rd party integrations + Performs unit-testing and resolves code defects + Assists with technical design and documentation **Minimum Qualifications:** + Bachelor’s degree or 4+ years of additional software development experience in lieu of degree + 7+ years of software development experience + Experience with least one scripting language (Ruby, Python, Perl, Bash, JavaScript) + Knowledge of Linux operating systems (RHEL/CentOS/Debian) and its fundamentals + Possess a current DoD Approved 8570 IAT Level II Certification (e.g. Security+ CE) **Preferred Qualifications:** + Experience with IaC - Terraform, CloudFormation + Experience with Microservice architecture and orchestration - Kubernetes / ECS + Experience with Cryptography / PKI - SSL, TLS certificate management + Knowledge of Secret / credential management - HashiCorp Vault + Knowledge of Access Control Policy / RBAC **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.