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# CNO Developer (iOS)

- **Company:** Cornerstone Defense
- **Location:** Annapolis Junction, MD, United States
- **Experience:** Experienced
- **Salary:** $185,000.0 - $205,000.0
- **Contract:** Permanent contract
- **Skills:** Application Lifecycle Management, Cyber Security, Software Debugging, Reverse Engineering, SAS (Software), Information Technology, IDA Pro, Cyber Warfare, Vulnerability Analysis
- **Published:** October 26, 2026
- **Apply:** https://www.clearancejobs.com/jobs/8811475/cno-developer-ios

## About the Role

We are seeking a highly motivated and technically skilled CNO Developer to join our iOS team supporting mission-critical cyber operations. The ideal candidate must possess strong software engineering fundamentals, hands-on experience with iOS internals, and at least two years of cybersecurity or CNO-focused development. This role supports mission-driven SAS efforts and requires engineers comfortable working at low levels of the operating system, analyzing complex behaviors, and developing advanced capabilities in constrained environments., * 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., * 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.

## Description

Cornerstone Defense offers a very comprehensive benefits package including, but not limited to: 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 * CollegeAmerica 529 * Fitness Reimbursement Program * Travel Assistance * Norton Lifelock Benefit Solutions * Life Planning Financial & Legal Services *