Cyber Systems Engineer

Cornerstone Defense LLC; Sunnyvale (CA); On-site; USD 90,000 - 165,000; Full time

Benefits offered by this job

401(k) match

Tuition assistance

Paid time off

Health benefits

Fitness reimbursement

Job summary

Cornerstone Defense LLC in Sunnyvale, CA is seeking a Cyber Systems Engineer to support the COOLR program’s AEHF system components. The role requires active security clearance and a bachelor’s degree, with seven years of relevant experience.

You will implement and maintain IT and cyber-security across production and test environments, ensure RMF compliance, and provide on-site support on a 9x80A schedule. The position offers a competitive salary in the $90,000–$165,000 range and a comprehensive

Qualifications

• Bachelor's degree required.
• Minimum seven years of relevant experience.
• Active Security+ certification or equivalent.
• Experience with Linux/UNIX, Windows, and embedded hardware.
• Storage management with NAS/SAN systems.
• Knowledge of STIGs and RMF-based compliance.

Responsibilities

• Deliver IT and cyber-systems security support for AEHF components.
• Maintain digital ecosystem across production and testing environments.
• Follow a 9x80A schedule.
• 100% on-site work.
• Deploy, configure, harden, and support disaster-recovery (NetBackup/Veeam).
• Install, secure, and monitor NAS/SAN solutions (NetApp or equivalent).
• Apply STIGs, manage patches/upgrades per RMF compliance.
• Execute changes using change-management tools and maintain asset inventories.
• Provide on-site operational support during day hours; after-hours when needed.
• Lead technical discussions and mentor peers across teams.

Skills

System administration

Cybersecurity

Network administration

Scripting

Education

Bachelor's degree

Tools

NetBackup/Veeam

NetApp NAS/SAN

RMF compliance

Job description

Cyber Systems Engineer

Sunnyvale, CA

Active Secret or Top Secret

Salary Range: $90,000 – $165,000

Certification Requirements: Current Security+ (CompTIA)

Company Overview:

Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities of the U.S. Government. Realizing early on that our most prized assets are our employees, we continually focus our attention on improving the overall work/life experience they have supporting the mission. Our Team is pushed every day to use their industry leading knowledge to provide end-to-end solutions to combat our nation’s toughest and most secure problems. If you are looking for a place to not only be professionally challenged, but encouraged and supported by a company that cares, don’t look any further than Cornerstone Defense.

Job Responsibilities:

The engineer will deliver IT and cyber‑systems security support for the COOLR program’s AEHF System Database (ASDB), Flight Software (FSW), and Network AEHF System Testbed‑Tools (NAST‑T).

• Responsible for maintaining the digital ecosystem across production and testing environments, ensuring all systems remain efficient, secure, and reliable.
• Follow a 9x80A schedule.
• 100% on-site.
• Requires a bachelor’s degree and a minimum of seven years of relevant experience.
• Active Security+ certification
• System Administration (Linux/UNIX, Windows, embedded hardware)– deploy, configure, harden, troubleshoot, and support disaster‑recovery (NetBackup/Veeam).
• Storage Management– install, secure, and monitor NetApp or other NAS/SAN solutions.
• Cyber‑Compliance– apply STIGs, manage patches/upgrades, perform trusted downloads, and maintain RMF‑based compliance.
• Change & Asset Management– execute changes using change‑management tools and keep asset inventories up to date.
• Operational Support– work onsite during day‑shift business hours; provide after‑hours support when critical operations demand it.
• Collaboration & Knowledge Sharing– lead technical best‑practice discussions, mentor peers, and coordinate with functional teams to resolve issues.

Company Benefits:

Cornerstone Defense offers a comprehensive list of benefits, designed to give employees and their families several options to choose from when selecting benefits that best fit their needs.These offerings include not only a full suite of the traditional Medical/Dental/Vision insurances, but also a number of other benefits and perks to include, but not limited to:A 401(K) plan with a company match, tuition and training assistances, paid vacation/leave, a fitness reimbursement program, college savings plan, commuter benefits, financial advisory services, flex spending accounts, health savings accounts, STD/LTD coverage, life and AD&D insurance, employee assistance programs, life financial planning assistance, and legal resources.