CNO Developer (iOS) with Security Clearance

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.

Benefits

• Medical, Dental and Vision Plans
• Generous PTO Policy
• 401(k)
• HSA and FSA options
• Life and Disability Insurance
• Tuition Reimbursement and Training
• Perks at Work Discount Program
• Referral Program
• Leads Generation Program
• NCAA 529
• Fitness Reimbursement Program
• Travel Assistance
• Norton Lifelock Benefit Solutions
• Life Planning Financial & Legal Services

Required Skills

• Strong iOS internals experience, including knowledge of operating system architecture, application lifecycle, security mechanisms, sandboxing, and system-level behavior.
• Reverse engineering experience using IDA Pro or Ghidra.
• Ability to analyze binaries, interpret compiler output, and understand functionality without symbols.
• Proficiency in C and C++ for low-level, performance-sensitive, or security-focused development.
• Experience developing, debugging, and sustaining software in constrained, embedded, or security-sensitive environments.
• Demonstrated ability to design, implement, test, and maintain complex capabilities end-to-end.

Desired Skills

• Experience with vulnerability research, exploitation, or mobile-focused security research.
• Familiarity with kernel-mode concepts or OS-level subsystem behavior.
• Experience supporting mission-focused CNO tool development.
• Comfort working in small, fast-moving, high-trust engineering teams.

Qualifications

• Bachelor's degree in computer science or related discipline from an accredited college or university, plus five (5) years of experience as a SWE, in programs and contracts of similar scope, type, and complexity.
• At least 2 years of experience must be in cybersecurity or CNO-specific development.