Cybersecurity Information System Security Engineer - Clearance Required

OverviewLMI is seeking a skilled Senior Cybersecurity Information Systems Security Engineer (ISSE) to support US Army Portfolio Acquisition Executive (PAE) Maneuver Ground office in Detroit, MI. The ISSE will drive efforts that support software and hardware cybersecurity Risk Management Framework (RMF) Authority to Operate (ATO). LMI is a new breed of digital solutions provider dedicated to accelerating government impact with innovation and speed.

Investing in technology and prototypes ahead of need, LMI brings commercial-grade platforms and mission-ready AI to federal agencies at commercial speed.

Leveraging our mission-ready technology and solutions, proven expertise in federal deployment, and strategic relationships, we enhance outcomes for the government, efficiently and effectively. With a focus on agility and collaboration, LMI serves the defense, space, healthcare, and energy sectors—helping agencies navigate complexity and outpace change. Headquartered in Tysons, Virginia, LMI is committed to delivering impactful results that strengthen missions and drive lasting value.

This position requires an active Secret clearance and onsite presence in Detroit. MI. Responsibilities Responsibilities:  Collaborate with system engineers, program managers, and Authorizing Officials (or their delegates) to define and implement system security requirements. Lead efforts to ensure continuous monitoring and verification of cybersecurity requirements throughout the system lifecycle. Serve as a trusted cybersecurity advisor, providing guidance and recommendations to government stakeholders and contractor teams.

Design, review, and refine system security architectures for cloud, on-premises, and hybrid environments. Support the Risk Management Framework (RMF) process to achieve and maintain Authority to Operate (ATO) approvals. Identify, track, and mitigate security control gaps and areas of non-compliance, ensuring alignment with security standards. Conduct risk assessments, vulnerability assessments, and develop and maintain critical documentation, such as System Security Plans (SSPs).

Manage and facilitate Interim Authority to Test (IATT) activities, risk assessments, and all ATO-related processes. Analyze and interpret security control deficiencies to assess their impact on enterprise risk levels and cybersecurity program effectiveness. Partner with the Information System Security Manager (ISSM) and product teams to identify control gaps, propose mitigations, and prepare Program of Action and Milestone (POAM) plans for ATO submission.

Guide system engineers on the mitigation of vulnerability findings using state-of-the-art security scanning tools, DoD policies, and industry best practices. Provide cybersecurity engineering expertise in evaluating alternatives, assessing trade-offs, and recommending risk treatment strategies. Collaborate with cross-functional teams to ensure the delivery of secure and dependable systems. Develop and maintain dashboards to monitor platform system controls, logs, and compliance status, ensuring seamless reporting.

Demonstrate expertise in implementing cloud cybersecurity solutions and practices. Apply NIST SP 800-53 Revision 4 or 5 security controls and security assessment procedures from NIST SP 800-53A. Core Knowledge, Skills, Abilities, and Tasks (KSATs) – DoD Cyber Workforce (DCWF):
In-depth knowledge of computer networking concepts, protocols, and methodologies to ensure effective network security. Expertise in risk management processes, including methodologies for identifying, assessing, and mitigating risks. Comprehensive understanding of national and international laws, regulations, policies, and ethical standards impacting cybersecurity operations.…