MANTECH seeks a motivated, career and customer-oriented **Systems Engineer III** to join our team in **Annapolis Junction, Maryland** . ManTech is currently seeking Systems Engineer III to join our team at Annapolis Junction, MD. We are seeking a Senior Systems Engineer who is a seasoned IT professional responsible for designing, implementing, and a top-level trouble shooter supporting a high-level architecture of an organization's backend infrastructure. You will communicate with other project personnel, Government stakeholders, and senior executives. **Responsibilities include but are not limited to:** + Administer and maintain IT infrastructure by utilizing expert-level knowledge of the Linux operating system, along with deep expertise in server administration, virtualization, and cloud platforms like AWS or Azure, to manage the organization's backend systems. + Develop and implement automation solutions through creating scalable automation services using strong scripting and orchestration skills, with proficiency in tools like Python, Bash, and Ansible. + Design and manage system architecture by applying systems engineering principles to design, implement, and manage the high-level architecture of the organization's backend infrastructure. + Ensure network and system security through a strong understanding of networking and security fundamentals, including TCP/IP, firewalls, and VPNs, to protect the organization's infrastructure. + Communicate with stakeholders - Interact directly with government personnel, senior executives, and other project members to discuss technical issues and project status. + Provide technical guidance and troubleshooting as a top-level troubleshooter, addressing technical considerations, problems, and issues for both internal teams and government stakeholders. **Minimum Qualifications:** + Bachelor's degree in STEM field or Highschool and 13 years of experience; Associates and 11 years of experience in lieu of degree, a candidate holding a relevant master’s degree may be granted 2 years’ experience credit for that extra education, a candidate holding a relevant PhD degree may be granted 4 years’ experience credit for that extra education. + 5 years of position-relevant work experience. + DoD 8570.01-m IAT Level II. + Strong proficiency in scripting and automation, with hands-on experience in Python, Bash, and an infrastructure orchestration tool like Ansible. + Experience in front-end web development to create internal tools and solutions. + Proven background as an Orchestration Engineer or in a similar role focused on building scalable automation services. + Solid grasp of TCP/IP networking, firewalls, VLANs, and VPNs. + Expert-level knowledge of the Linux operating system. **Preferred Qualifications:** + Experience with full-stack development, including creating and interacting with databases and APIs. + Knowledge of Infrastructure as Code (IaC) principles, preferably with experience using Terraform. + Familiarity with public cloud platforms (AWS, Azure, GCP) and container technologies (Docker, Kubernetes). + Proficiency with virtualization platforms such as VMware vSphere or Microsoft Hyper-V. + Exceptional troubleshooting and problem-solving skills, with a talent for systematically diagnosing and resolving complex technical issues. + A foundational understanding of traditional Systems Administration principles **Clearance Requirements:** + TS/SCI **Physical Requirements:** + The person in this position must have the ability to perform tasks while stationary 50% of the time at a computer, with specific emphasis on visual acuity for close-range work. 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.