Preparing for an interview at Leidos requires a balanced approach. You must demonstrate deep technical proficiency in core DevOps tools while showcasing the communication skills necessary to collaborate within a large, structured enterprise environment.

Role-Related Knowledge – You must have a strong command of Git, cloud platforms (specifically AWS), and Infrastructure as Code (IaC). Interviewers will expect you to explain not just how to use these tools, but why you choose specific configurations and architectures over others.

Problem-Solving Ability – Leidos values engineers who approach infrastructure challenges systematically. When faced with troubleshooting scenarios, focus on explaining your diagnostic process, how you isolate variables, and how you ensure the root cause is permanently mitigated.

Security and Compliance Mindset – Given the nature of Leidos' client base, security cannot be an afterthought. Be prepared to discuss how you incorporate security practices (DevSecOps) into every stage of the development lifecycle.

Collaboration and Communication – You will often present your ideas to multidisciplinary panels or work closely with software developers who may not have an infrastructure background. Your ability to translate complex technical concepts into clear, actionable ideas is highly valued.

The interview process at Leidos is highly professional, structured, and runs at a relaxed, respectful pace. It is designed to evaluate both your technical alignment with the team's stack and your cultural fit within the organization's collaborative ecosystem. Candidates frequently report that the process is smooth and that the interviewers are focused on relevant, practical skills.

The journey typically begins with an initial conversation with a recruiter to align on your background, expectations, and the specific project requirements. Following this, you will progress to a comprehensive technical interview. This is often conducted by a multi-person panel of engineers and team leads with whom you would be working. This panel format ensures a well-rounded evaluation and gives you a clear sense of the team dynamic.

The timeline above illustrates the typical progression from your initial application to the final offer stage. Candidates generally receive feedback and next steps within a few weeks of their panel interview, making the overall experience predictable and efficient. This structured approach allows both you and the hiring team to make an informed decision without unnecessary delays.

To succeed in the Leidos DevOps Engineer interview, you must understand the specific competencies the hiring panel will focus on. The technical evaluation is practical and centers around three main pillars.

Cloud Infrastructure & Automation

This area evaluates your hands-on experience with cloud platforms and your ability to automate the provisioning of resources. You must demonstrate that you can build scalable, self-healing, and cost-effective cloud environments.

Be ready to go over:

• AWS Core Services – Deep understanding of EC2, S3, RDS, and IAM.
• Infrastructure as Code – Writing clean, modular Terraform configurations.
• State Management – Best practices for locking, backend storage, and state migration.
• Advanced concepts (less common) – Multi-cloud strategies, hybrid cloud connectivity, and automated compliance-as-code policies.

Example scenarios:

• "Describe how you would automate the migration of a legacy on-premises application to AWS using Terraform."
• "How do you ensure your infrastructure code is dry (Don't Repeat Yourself) when managing dev, staging, and production environments?"

CI/CD & Version Control

Your interviewers want to see that you can build reliable delivery pipelines that empower developers to ship code safely. They will look for a strong understanding of automation, testing, and pipeline efficiency.

Be ready to go over:

• Git Workflows – Gitflow, trunk-based development, and pull request processes.
• Pipeline Orchestration – Configuring pipelines using tools like GitLab CI, Jenkins, or GitHub Actions.
• Artifact Management – Managing and securing container images and software packages.
• Advanced concepts (less common) – Blue-green deployments, canary releases, and GitOps-driven deployment models.

Example scenarios:

• "Walk us through how you would set up a pipeline that builds a Docker image, runs vulnerability scans, and deploys it to a Kubernetes cluster."
• "How do you handle rollbacks in an automated deployment pipeline when a post-deployment smoke test fails?"

Secure Networking & DevSecOps

Security is a foundational element of every project at Leidos. You must prove that you can design secure network architectures and integrate security controls into your automated processes.

Be ready to go over:

• VPC Architecture – Subnetting, routing, NAT gateways, and VPC peering.
• Network Security – Configuring firewalls, security groups, and NACLs.
• Identity & Access Management – Crafting granular IAM policies and role assumptions.
• Advanced concepts (less common) – Zero Trust architecture, secret rotation automation, and implementing federal compliance standards (e.g., NIST, FedRAMP).

Example scenarios:

• "How would you isolate a compromised resource within a private subnet while preserving forensic data?"
• "Describe your approach to managing and rotating database credentials used by an automated microservice."

As a DevOps Engineer at Leidos, your daily activities will center around automation, pipeline reliability, and cross-team collaboration. You will be the primary advocate for modern operational practices within your project team.

You will spend a significant portion of your time writing and maintaining Infrastructure as Code templates to ensure that development, testing, and production environments are identical and easily reproducible. This minimizes configuration drift and accelerates deployment cycles. You will also design, monitor, and optimize CI/CD pipelines to ensure fast feedback loops for software development teams.

Collaboration is a core aspect of this role. You will work closely with software developers to help them package their applications efficiently, security officers to ensure compliance with strict organizational and federal standards, and system administrators to manage hybrid or legacy infrastructure. Additionally, you will implement robust monitoring, logging, and alerting systems to proactively identify and resolve performance bottlenecks before they impact end users.