Enterprise Platform Security Manager

Overview LMI is seeking an Enterprise Platform Security Manager to lead the security strategy, governance, and operational execution for enterprise platforms supporting mission-critical capabilities across the Department of Defense and United States Special Operations Command (USSOCOM). This leader will drive security across cloud-native platforms, enterprise applications, AI workloads, and modern software delivery pipelines while enabling rapid innovation and mission success.  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 with the ability to obtain and maintain a Top Secret clearance.  Responsibilities As the Enterprise Platform Security Manager, you will establish and lead the security program for enterprise platforms supporting cloud infrastructure, collaboration environments, DevSecOps pipelines, enterprise applications, AI services, and hybrid environments. You will serve as the technical and strategic leader responsible for ensuring security is integrated into every phase of the platform lifecycle while enabling rapid delivery of mission capabilities.  You will develop enterprise security strategies aligned to Zero Trust principles and oversee implementation of security controls across Microsoft Azure, Microsoft 365 GCC High, AWS, hybrid infrastructure, and containerized environments. You will partner closely with engineering, platform, operations, compliance, and program leadership to ensure security enables—not slows—innovation.  You will lead security governance activities including risk assessments, architecture reviews, vulnerability management, incident response coordination, compliance reporting, and continuous monitoring. You will oversee Authorization to Operate (ATO) efforts under the DoD Risk Management Framework (RMF) and ensure enterprise platforms remain compliant with evolving DoD cybersecurity requirements.  You will provide technical leadership for identity and access management, privileged access management, endpoint security, cloud security posture management, data protection, SIEM, EDR, and security automation initiatives. You will identify emerging threats, evaluate new technologies, and continuously improve the organization's security posture through measurable risk reduction.  You proactively solve complex organizational and technical challenges with minimal direction while balancing mission delivery, operational efficiency, and cybersecurity risk. You thrive in fast-paced environments where collaboration, innovation, and ownership are expected.  Qualifications Required Qualifications Active Secret clearance with the ability to obtain and maintain a Top Secret clearance  Minimum of 8 years of progressively responsible cybersecurity experience with at least 3 years leading enterprise security initiatives or security teams  Demonstrated experience securing enterprise cloud environments, hybrid infrastructure, and modern software platforms within DoD, Intelligence Community, or other federal organizations  Experience developing and implementing enterprise security architecture aligned with Zero Trust principles  Strong understanding of DoD Risk Management Framework (RMF), NIST SP 800-53, NIST Cybersecurity Framework, and applicable DoD cybersecurity policies  Experience leading enterprise vulnerability management, security operations, incident response, and continuous monitoring programs  Working knowledge of Identity and Access Management (IAM), Entra ID, Conditional Access, Privileged Identity Management (PIM), and Multi-Factor Authentication  Experience collaborating with executive leadership, engineering organizations, compliance teams, and external government stakeholders  Excellent written and verbal communication skills  Desired Qualifications Active Top Secret or TS/SCI clearance  Bachelor's or Master's degree in Cybersecurity, Information Technology, Computer Science, Engineering, or related discipline  CISSP, CCSP, CISM, CASP+, or equivalent senior cybersecurity certification  Experience implementing Zero Trust Architecture within DoD or Federal environments  Experience with Kubernetes, OpenShift, Docker, and container security platforms  Familiarity with Infrastructure as Code (Terraform, Bicep, ARM, or CloudFormation) and DevSecOps practices  Experience supporting Microsoft Power Platform, Microsoft Fabric, enterprise AI platforms, or secure data platforms  Experience implementing Security Automation and Orchestration (SOAR) capabilities  Experience supporting Special Operations, Intelligence Community, or Combatant Command organizations  Experience leading security strategy for enterprise collaboration platforms, AI services, and digital transformation initiatives  Disclaimer: The salary range displayed represents the typical salary range for this position and is not a guarantee of compensation. Individual salaries are determined by various factors including, but not limited to location, internal equity, business considerations, client contract requirements, and candidate qualifications, such as education, experience, skills, and security clearances. #LI-SH1 Applicants must meet eligibility requirements for a U.S. Government