AWS Cloud Security Engineer

About this role

Responsibilities Peraton is seeking an experienced AWS Cloud Security Engineer to design, build, and operate security controls for a FedRAMP Moderate-authorized AWS cloud infrastructure supporting Peraton's RDG (Risk Decision Group) program. This is a hands-on role with a key part in day-to-day cloud security operations, embedding secure-by-design principles into cloud architecture, and maintaining continuous FedRAMP compliance. The engineer is responsible for implementing security architecture, hardening cloud environments, maintaining continuous compliance monitoring, and supporting Authorization to Operate (ATO) activities. The ideal candidate has hands-on experience securing AWS environments within a federal compliance framework (FedRAMP, NIST 800-53, NIST 800-171, RMF, or similar). This is a 100% remote position. Responsibilities

Design and implement security architecture for AWS workloads aligned with FedRAMP Moderate baseline controls

Build and maintain security guardrails using AWS-native services (IAM, GuardDuty, Security Hub, Config, CloudTrail, KMS, WAF, Macie, Inspector)

Implement and manage Infrastructure as Code security controls (Terraform/CloudFormation) with policy as code

Support System Security Plans (SSPs), ATO activities, and POA&M remediation

Perform continuous monitoring, vulnerability scanning, patch management tracking, and monthly/annual assessment support

Configure and maintain centralized logging, SIEM integration, and audit trail retention per FedRAMP/NIST requirements

Implement least-privilege IAM policies, service control policies (SCPs), and cross-account access controls.

Manage encryption at rest and in transit (KMS, ACM, TLS enforcement) per FIPS 140-2/140-3 requirements where applicable

Respond to security incidents, perform root cause analysis, and support cloud-specific incident response playbooks

Collaborate with DevOps/Platform teams to embed security into CI/CD pipelines (DevSecOps)

Maintain documentation for control implementation statements, architecture diagrams, and audit evidence

Support boundary definition and system categorization activities (FIPS 199) as required

Qualifications Required Qualifications

US citizenship required; ability to obtain and maintain a Top-Secret eligible clearance

Minimum 8 years work experience with BS/BA in computer science, Information Systems, or a related field (or equivalent experience)

5+ years of hands-on AWS engineering experience, with 3+ years specifically in cloud security roles

Demonstrated experience working within a FedRAMP Moderate or FedRAMP High, DoD IL4/IL5, or equivalent federal compliance environment

Experience supporting or maintaining an SSP and RMF processes

Experience with AWS GovCloud (US), AWS Commercial, or equivalent federal AWS environments

Strong hands-on expertise with AWS security services: IAM, GuardDuty, Security Hub, AWS Config, CloudTrail, KMS, WAF, Macie, Inspector, and Systems Manager

Solid understanding of NIST SP 800-53 Rev 5 control families (AC, AU, CM, IA, SC, SI, etc.) and the ability to map implementations to specific controls

3+ years of experience with Infrastructure as Code (Terraform and/or CloudFormation), including security scanning and policy-as-code tools

Networking security fundamentals: VPC design, security groups, NACLs, PrivateLink, Transit Gateway, and network segmentation for compliance boundaries

Experience with vulnerability management tools (AWS Inspector or similar) and remediation tracking

Experience implementing Zero Trust Architecture (ZTA) in AWS

Familiarity with SIEM/log aggregation tools (Splunk, AWS CloudWatch, OpenSearch, or similar) for security event monitoring

Scripting ability in Python or Bash for automating compliance checks and remediation

Understanding of encryption standards relevant to federal systems (FIPS 140-2/140-3, TLS 1.2+)

One of the following certifications: AWS Certified Security – Specialty, or AWS Certified Solutions Architect – Professional (with a security focus), or CISSP, CISM, or Security+ (with strong AWS hands-on experience).

Preferred Qualifications

Direct experience supporting a Peraton program or similar federal integrator (Leidos, Booz Allen, SAIC, General Dynamics IT, etc.)

Familiarity with server and systems hardening software

Experience with container security (ECS/EKS), including image scanning (ECR scanning) and runtime protection

Experience with AWS Control Tower and multi-account landing zone security governance

Experience automating compliance evidence collection for continuous ATO (cATO)

Prior experience with change management processes in a regulated/audited environment

Bachelor's degree in Computer Science, Cybersecurity, Information Technology, or a related field

Active security clearance

Experience with AWS AI services (Amazon Bedrock)

Experience with hybrid/multi-cloud architecture, including Azure (VNets, Azure AD/Entra ID, Azure Policy, ExpressRoute)

Experience with Microsoft .NET

Experience supporting ATO/continuous monitoring processes

Familiarity with DevSecOps pipelines

Familiarity with AI security and governance frameworks, national security/defense/critical infrastructure missions, and supporting federal agencies or large GovCon programs

#RDG

Peraton Overview Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world’s leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies. Peraton operates at the critical nexus between traditional and nontraditional threats across all domains: land, sea, space, air, and cyberspace. The company serves as a valued partner to essential government agencies and supports every branch of the U.S. armed forces. Each day, our employees do the can’t be done by solving the most…