The Health and Services Operation of Leidos is seeking a Senior Cloud Engineer to support our NIH (National Institutes of Health) client in Bethesda, MD, in architecting, securing, and operating enterprise AWS networking environments supporting mission-critical NIH systems. This role requires deep AWS expertise combined with a strong working knowledge of federal cybersecurity mandates, compliance frameworks, and zero-trust architecture principles. Candidates MUST US Citizen or Green Card holder with the ability to obtain and maintain HHS Public Trust clearance Be currently located in the UNITED STATES for the CURRENT three consecutive years Primary Responsibilities Provide AWS network administration, security, configuration management, and maintenance of MULTIPLE VPCs , S ecurity Groups, Load Balancers, Web Application Firewalls, and related cloud-based network architecture for a custom-built enterprise system Implement network configuration changes using Infrastructure-as-a-Service model, develop network designs, and implement cloud security best practices Maintain and ensure the ongoing stability and continuous operations of internal and external connections, including Direct Connect (DX) Harden cloud networking environments to ensure compliance with FedRAMP Moderate/High, NIST 800-53, and Zero Trust Architecture (ZTA) requirements Provide technical expertise in all areas of network and software interconnection and interfacing, such as ALBs, NLBs, Security Groups, gateways, etc. Perform requirements gathering, gap analysis, technical studies, risk assessments, and vendor selection for cloud networking projects and system enhancements Collaborate with Security, DevOps, and Systems Engineering teams to ensure compliance and performance Participate in a 24x7 365 days a year on-call rotation for Production systems, investigate, mitigate, and resolve network related issues in accordance with SLA’s Maintain processes and technical documentation, network diagrams, etc. Education Minimum of Bachelor’s degree, or higher, in a System Engineering, Computer Science, Information Systems or other related field MUST hold an AWS Certified Solutions Architect or AWS Certified Advanced Networking Certification Qualifications 10+ years of relevant work experience in managing and designing AWS-based networks for large, enterprise-level systems Expert-level experience working in AWS (VPC, VPN Gateways, EC2 Instances, Route53) and a deep understanding of AWS network architecture, AWS concepts, API’s, HTTP protocol, and its extensions (SOAP, REST, etc.) Strong Infrastructure-as-Code (CloudFormation, Terraform, Ansible) and scripting (Python, Bash) skills and knowledge of AWS Lambda Expertise in designing and implementing VPCs, VPC routing, and VPC security for enterprise systems Excellent interpersonal and communication skills, with experience working in a highly collaborative environment Proven in-depth, hands-on experience with Agile/Scrum/Lean software development methods Proven experience preparing and presenting technical documentation to various audiences Ability to work on multiple assignments in parallel, balancing time and schedule based on the business priorities of the organization If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares. Original Posting April 6, 2026 For U.S. Positions While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. Pay Range Pay Range $107,900.00 - $195,050.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.