At MTSI (Modern Technology Solutions, Inc.), a Systems Engineer—often executing responsibilities as a Systems Administrator, COMSEC Specialist, or Information Assurance Engineer—plays a pivotal role in safeguarding and optimizing the nation's most critical defense and intelligence infrastructure. Unlike standard commercial IT roles, systems engineering at MTSI directly impacts national security, supporting military operations, aerospace development, and federal agencies. You will be tasked with designing, securing, and maintaining highly complex, classified, and unclassified networks that enable defense analysts and military personnel to execute their missions without interruption.

This position is highly collaborative and requires a unique blend of deep technical expertise and rigorous compliance knowledge. Whether you are deployed on-site at a military installation in Dayton, working in a secure facility in Washington, DC, or supporting aerospace initiatives in Los Angeles, your work ensures that systems are resilient against cyber threats, compliant with federal mandates, and optimized for peak performance. You will operate in high-stakes environments where system downtime or a security vulnerability could have real-world mission consequences.

Candidates who thrive at MTSI are those who take extreme ownership of their systems, possess an analytical approach to troubleshooting, and maintain an unwavering commitment to security compliance. Because MTSI is a rapidly growing, employee-owned engineering services provider, your contributions will directly influence company success, and you will have the opportunity to work alongside recognized industry experts on cutting-edge defense technologies.

To help you prepare effectively, we have compiled a list of common questions based on real interview experiences at MTSI. These questions are structured to evaluate both your technical proficiency and your ability to operate within highly regulated, secure federal environments.

Systems Administration & Infrastructure

This category evaluates your hands-on technical skills in managing enterprise-level hardware, operating systems, and virtualization platforms. Interviewers want to see how you troubleshoot complex system failures and manage system resources.

• How do you approach troubleshooting a sudden, unexplained slow-down on a Windows Server running active directory services?
• Describe your experience with virtualization technologies like VMware or Hyper-V, particularly in high-availability environments.

Successfully interviewing at MTSI requires more than just technical knowledge; it demands a clear understanding of how your skills translate to the defense consulting and engineering services sector. Your preparation should focus on demonstrating both technical competence and a deep respect for the security protocols that govern federal systems.

Role-Related Knowledge – You must demonstrate a strong command of enterprise systems administration, virtualization, and network infrastructure. Be ready to discuss specific operating systems (Windows Server, Red Hat Enterprise Linux), directory services, and hardware platforms you have managed in production environments.

Security & Compliance Mindset – At MTSI, security is not an afterthought. You will be evaluated on your understanding of federal security mandates, including NIST SP 800-53, DISA STIGs, and the Risk Management Framework (RMF). You must show that you treat compliance as a core engineering requirement rather than a bureaucratic hurdle.

Problem-Solving & Troubleshooting – Interviewers will present you with open-ended technical scenarios to observe your critical thinking. They are less interested in you knowing the perfect answer immediately and more focused on your structured, logical approach to diagnosing and resolving complex system anomalies.

Communication & Stakeholder Management – As a consultant and engineering partner to federal clients, you must be able to communicate complex technical concepts clearly and professionally. You need to show that you can build trust with military personnel, government civilians, and internal MTSI team members alike.

The interview process at MTSI is designed to be thorough, professional, and transparent. Because many positions require active security clearances and specialized technical skills, the process is structured to verify your technical capabilities, security eligibility, and cultural alignment with the company's employee-owned ethos.

The journey typically begins with an initial screening by a technical recruiter, followed by one or more technical discussions, and concludes with a comprehensive panel interview. Throughout the process, MTSI aims to move candidates efficiently while ensuring a deep mutual fit for both the candidate and the project team.

The diagram above illustrates the typical progression of the MTSI interview pipeline. Candidates will move from an initial administrative and clearance verification screen through to deep-dive technical evaluations before meeting the broader team. Use this timeline to pace your preparation, focusing first on core technical concepts and security frameworks before refining your situational and behavioral examples.

To excel in your technical interviews at MTSI, you must understand the specific domains where you will be evaluated. Below is a detailed breakdown of the primary evaluation areas for the Systems Engineer and Systems Administrator roles.

Enterprise Systems Administration

This evaluation area focuses on your ability to deploy, maintain, and optimize enterprise IT infrastructure. Interviewers want to ensure you possess the hands-on skills required to keep mission-critical systems operational and secure.

Be ready to go over:

• Active Directory and Group Policy – Designing organizational units, managing user permissions, and enforcing security baselines through GPOs.
• Virtualization & Storage – Managing VMware vSphere environments, configuring virtual switches, provisioning datastores, and maintaining SAN/NAS storage arrays.
• Scripting and Automation – Utilizing PowerShell or Bash to automate patch deployment, system monitoring, and user provisioning to reduce human error.
• Advanced concepts (less common) – High-availability clustering, disaster recovery site replication, and transitioning legacy on-premise workloads to secure cloud environments (e.g., AWS GovCloud).

Example scenarios:

• "Describe how you would isolate and troubleshoot a replication failure between two domain controllers in different physical locations."
• "You need to deploy a critical security patch to 500 disconnected virtual machines. Walk us through your strategy to automate and verify this deployment."

Information Assurance & RMF Compliance

For MTSI systems engineers, security compliance is a daily operational reality. This area tests your ability to secure systems in accordance with Department of Defense (DoD) and federal standards.

Be ready to go over:

• The RMF Lifecycle – Navigating the steps of the Risk Management Framework, from system categorization to continuous monitoring.
• Vulnerability Management – Running compliance scans using ACAS/Nessus, interpreting SCAP compliance tool results, and manually verifying STIG compliance.
• Audit Logging and Monitoring – Configuring centralized log management (e.g., Splunk, Syslog) to meet federal auditing requirements and conducting regular log reviews.
• Advanced concepts (less common) – Drafting System Security Plans (SSPs), managing Plan of Action and Milestones (POA&M) items, and preparing systems for formal SCA (Security Control Assessor) audits.

Example scenarios:

• "A vulnerability scan identifies a high-severity vulnerability on a system that cannot be patched due to legacy software constraints. How do you develop and document a compensating control?"
• "Explain the steps you take to harden a newly installed Red Hat Enterprise Linux server to meet DoD STIG requirements."

COMSEC & Cryptographic Operations

If your role involves COMSEC responsibilities, you will face specific questions regarding the management of classified cryptographic materials and devices.

Be ready to go over:

• Cryptographic Device Configuration – Installing, configuring, and troubleshooting network encryptors like the TACLANE KG-175.
• Key Management Infrastructure (KMI) – Loading keys using fill devices (Simple Key Loader, KIK-11), generating keying material, and managing key lifecycles.
• Physical Security & Custodian Duties – Maintaining COMSEC ledgers, executing emergency destruction plans, and managing secure storage containers (GSA-approved safes).

Example scenarios:

• "You are configuring a point-to-point secure network link using two KG-175 devices. Walk us through the process of loading the keys and establishing the secure tunnel."
• "What immediate administrative and physical actions do you take if you discover a discrepancy in your daily COMSEC key inventory?"