Cybersecurity Engineer

LMI is seeking a Cybersecurity Engineer with demonstrated experience securing mission-critical systems and networks to support a United States Special Operations Command (USSOCOM) mission partner.

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 a Top-Secret.

As a Cybersecurity Engineer, you will design, implement, and harden security controls across cloud, on-premises, and hybrid environments supporting a fast-moving technical organization in direct support of the warfighter. You will partner with engineering, data, and operations teams to bake security into the build rather than bolt it on at the end.

You will lead vulnerability management, conduct security architecture reviews, configure and tune security tooling (SIEM, EDR, IDS/IPS, vulnerability scanners), and respond to incidents end-to-end. You will produce and maintain artifacts required for Authorization to Operate (ATO) under the DoD Risk Management Framework (RMF).

You will translate NIST 800-53, DISA STIGs, and CNSSI guidance into practical engineering decisions, and you will work directly with the ISSO and ISSM to keep the system’s security posture defensible and auditable.

You proactively solve unusual and/or complex problems with little, or no direction given, and you thrive in a fast-paced technical environment that prioritizes mission impact and speed.

You are fluent in scripting (PowerShell, Python, or Bash), comfortable in cloud environments (Azure, AWS, or GCC High), and proficient with Microsoft 365 security tooling.

• Active Secret clearance required with the ability to obtain and maintain a Top-Secret clearance
• Minimum of 5 years of hands-on cybersecurity engineering experience in DoD, IC, or other federal environments
• Demonstrated experience implementing and maintaining controls under the NIST Risk Management Framework (RMF) and NIST SP 800-53
• Hands-on experience with SIEM platforms (Splunk, Sentinel, or Elastic), EDR tooling, and vulnerability management platforms (Tenable, Rapid7, or equivalent)
• Experience applying DISA STIGs, SCAP scanning, and remediating findings on Windows, Linux, and network devices
• DoD 8570/8140 IAT Level II certification (Security+ CE, CCNA-Security, GSEC, or equivalent) at time of hire
• Proficiency scripting in PowerShell, Python, or Bash to automate security tasks

Desired Qualifications

• Active DoD Top-Secret Clearance
• Bachelor’s or Master’s Degree in Cybersecurity, Computer Science, or related field