Senior Cyber Security Engineer Jobs in Missouri (NOW HIRING)

Business Unit:Cubic DefenseCompany Details:When you join Cubic, you become part of a company that creates and delivers technology solutions in transportation to make people's lives easier by simplifying their daily journeys, and defense capabilities to help promote mission success and safety for those who serve their nation. Led by our talented teams around the world, Cubic is committed to solving global issues through innovation and service to our customers and partners.
We have a top-tier portfolio of businesses, including Cubic Transportation Systems (CTS) and Cubic Defense (CD). Explore more on Cubic.com.Job Details:Position Overview

Cubic Digital Intelligence is seeking a Senior Cybersecurity Engineer to support the security engineering and authorization of a mission-focused system for a U.S. Government customer. The successful candidate will lead cybersecurity compliance activities and work closely with customer security personnel, system engineers, and program leadership to help obtain and maintain an Authority to Operate (ATO).

This position is contingent upon contract award, funding, and customer approval.

Responsibilities

• Lead cybersecurity engineering and Risk Management Framework activities supporting system authorization.
• Develop, review, and maintain security plans, control implementations, risk assessments, and authorization artifacts.
• Coordinate with customer authorizing officials, security representatives, system owners, and engineering teams.
• Assess system designs and configurations against applicable government security requirements.
• Guide the implementation and documentation of technical, operational, and management security controls.
• Perform security-control assessments, vulnerability reviews, compliance checks, and risk analysis.
• Track findings, plans of action and milestones, dependencies, and remediation activities through closure.
• Support system hardening, secure configuration, access control, auditing, logging, and continuous monitoring.
• Evaluate proposed system changes for cybersecurity and authorization impacts.
• Prepare for and participate in security reviews, assessments, test events, and authorization meetings.
• Translate cybersecurity requirements into actionable engineering tasks.
• Communicate security risks, status, and recommendations to technical and program leadership.
• Support ongoing compliance and maintenance of the authorization baseline after ATO approval.

Required Qualifications

• Bachelor's degree in cybersecurity, information systems, computer science, engineering, or a related field.
• At least 8 years of relevant cybersecurity, information-assurance, or security-engineering experience.
• Demonstrated experience supporting ATO packages and the federal Risk Management Framework.
• Knowledge of security controls, assessment procedures, vulnerability management, and continuous monitoring.
• Experience developing security documentation and maintaining authorization evidence.
• Working knowledge of NIST SP 800-53 controls, RMF, eMASS, STIGs/SRGs, vulnerability management, continuous monitoring, and POA&M management.
• Experience securing cloud, hybrid, containerized, Kubernetes, or tactical-edge environments.
• Strong analytical, organizational, written, and verbal communication skills.
• Ability to work independently at a customer site while collaborating with a distributed project team.
• Active TOP Secret security clearance with ability to obtain SCI.
• DoD 8570/8140-compliant certification appropriate to the position.

Preferred Qualifications

• Master's degree in cybersecurity or a related technical discipline.
• Experience supporting defense, Intelligence Community, or other classified federal programs.
• Experience securing containerized, cloud-based, or distributed enterprise systems.
• Familiarity with government security policies, security technical implementation guidance, and automated compliance tools.
• Experience coordinating with Security Control Assessors or Authorizing Officials.
• CISSP, CAP/CGRC, CASP+, or another relevant advanced cybersecurity certification.

Additional Information

Employment is contingent upon contract award, funding, customer approval, and completion of applicable security, badging, and facility-access requirements. Responsibilities, location, and qualifications may be adjusted based on final contract requirements.

Cubic is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to any status protected by applicable law.

Cubic Pay Range:

$128,000.00 - $153,000.00 + benefits.

The Cubic 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.

Worker Type:Employee

We are committed to creating an inclusive workplace and welcome applications from people of all backgrounds. We do not discriminate based on any protected characteristic under applicable law.