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Systems Security Engineer Job in Dayton, Ohio US

Systems Security Engineer

Modern Technology Solutions, Inc. - Dayton, OH

Posted: 11/17/2025 - Expires: 2/15/2026

Job ID: 292893217

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Job Description

MTSI is seeking a highly skilled Systems Security Engineer to design, evaluate and maintain secure systems and networks within an embedded government-focused environment. The ideal candidate will work collaboratively with cross-functional teams to ensure compliance with Department of Defense (DoD) security standards, protect critical systems, and address emerging cybersecurity challenges. This role involves providing expertise in systems security architecture within embedded avionics systems, advising on anti-tamper designs, planning and coordinating mission based cyber risk assessments, conducting cybersecurity risk assessments, and performing system design reviews.

Responsibilities

Apply an understanding of DoD, Air Force and common engineering/scientific principles, processes and procedures to improve performance and sustainability of existing and future weapon systems.
Translate user requirements into weapon system requirements which will be used to design, develop, fabricate, test and evaluate weapon systems, subsystems and equipment for eventual fielding and deployment.
Perform technical/mission analyses of existing and future operational requirements, assist in developing systems concepts and perform technical trade-off assessments of designs/modifications.
Develop and maintain Risk Management Framework documentation necessary to obtain Authorizations including but not limited to the System Security Plan (SSP), Architecture Analysis Report (AAR), Continuous Monitoring Plan, Security Control Traceability Matrix (SCTM), Security Assessment Report (SAR) and Risk Assessment Report (RAR).
Provide support to produce or review technical documentation for acquisition programs including Cybersecurity Strategy, Test and Evaluation Master Plan (TEMP), Clinger-Cohen Act Compliance, Capabilities Development Document, Concept of Operations and more.
Support system engineering and program management in conducting and reviewing milestone documentation including System Requirements Review (SRR), Preliminary Design Reviews (PDR), Critical Design Reviews (CDR) and Program Management Reviews (PMR).
Perform information system security engineering tasks, ensuring that information security requirements are properly implemented throughout the processes of security architecture, design, development, configuration, and implementation.
Develop, implement, and enforce information systems security policies ensuring system security requirements are addressed during all phases of the acquisition and Information System lifecycle.
Review, analyze and validate system security designs within embedded avionics systems to validate security control and architecture implementations
Conduct Assessment & Authorization (A&A) tasks in accordance with the Risk Management Framework (RMF) and National Institute of Standards and Technology (NIST) policy; identify deficiencies and provide recommendations of risk mitigation to program management.
Employ best practices when implementing security controls, including software engineering methodologies, system/security engineering principles, secure design, secure architecture, and secure coding techniques
Integrate/Develop new techniques to improve Confidentiality, Integrity, and Availability for networks/systems operating at various classification levels
Assist program managers, system engineers and cyber test engineers in conducting Mission Based Cyber Risk Assessments
Identify points of vulnerability, non-compliance with established cybersecurity standards and regulations, and recommend mitigation strategies
Apply knowledge of cybersecurity policy, procedures, and workforce structure to implement secure networking, computing, and enclave environments
Identify system and/or network designs that encompass multiple enclaves to include those with differing data protection/classification requirements

Qualifications:

REQUIRED:

Education: BS degree from an accredited university including classes in Computer Science, Cybersecurity, Electrical/Electronics/Systems/Computer Engineering, or related field.
Experience: 5+ years of experience in systems security architecture or engineering, ideally within a government or DoD environment.
Certifications: Relevant certifications related to a Security Architect in accordance with DoD 8140 (CISSP, CISM, CCSP).
Knowledge: Deep understanding of cybersecurity frameworks (NIST) and standards, RMF, DISA STIGs, and system accreditation processes.
Technical Skills: Expertise with security concerns in avionics, embedded systems, Operational Technology and Supervisory Control and Data Acquisition systems.Familiarity with network security, firewalls, intrusion detection/prevention systems, secure coding practices, and vulnerability scanning tools.
Must possess an active Top Secret clearance with eligibility for SCI.

DESIRED:

Experience with government contracting and DoD security program management.
Familiarity with scripting, automation tools, and secure system integration techniques.
Understanding of cloud security in classified environments.

Travel: 20% anticipated travel, but could vary

#LI-CH1
#LI-Onsite
#Dragons
#Skyline






Interesting Work:



Our co-workers support some of the most important and critical programs to our national defense and security.





Values:



Our first core value is that employees come first. We challenge our co-workers to provide the highest level of support and service, and reward them with some of the best benefits in the industry.





100% Employee Owned:



We have a stake in each other's success, and the success of our customers. It's also nice to know what's going on across the company; we have company wide town-hall meetings three times a year.





Great Benefits - Most Full-Time Staff Are Eligible for:






Starting PTO accrual of 20 days PTO/year + 10 holidays/year

Flexible schedules

6% 401k match with immediate vesting up to $9k annually

Semi-annual bonus eligibility (July and December)

Company funded Employee Stock Ownership Plan (ESOP) - a separate qualified retirement account

Up to $10,000 in annual educational reimbursement

Other company funded benefits, like life and disability insurance

Optional zero deductible Blue Cross/Blue Shield health insurance plan





Track Record of Success:



We have grown every year since our founding in 1993.



Modern Technology Solutions, Inc. (MTSI) is a 100% employee-owned engineering services and solutions company that provides high-demand technical expertise in Digital Transformation, Modeling and Simulation, Rapid Capability Development, Test and Evaluation, Artificial Intelligence, Autonomy, Cybersecurity and Mission Assurance


MTSI delivers capabilities to solve problems of global importance. Founded in 1993, MTSI today has employees at over 20 offices and field sites worldwide.


For more information about MTSI, please visit www.mtsi-va.com




MTSI embraces nine core values including our first core value of Employees come first. Consistent with our Core Values, we are committed to Equal Opportunity, making decisions without regard to race, color, religion, sex, national origin, age, military/veteran status, disability, or any other characteristics protected by applicable law. MTSI is committed to Equal Employment Opportunity and providing reasonable accommodations to applicants and employees with physical and/or mental disabilities.

MTSI is an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability status, protected veteran status, or any other characteristic protected by law.

Job Summary

Employment Type:
Full Time Employee
Job type:
Federal Contractor
Skill Based Partner:
No
Education Level:
Bachelor's degree
Work Days:
Mon, Tue, Wed, Thu, Fri
Job Reference Code
85506757
Salary
N/A
Licenses / Certifications:
N/A
Display Recommended WorkKeys®Recommended WorkKeys®:
Applied Math: 5
Graphic Literacy: 5

Workplace Documentation: 6