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# Windows CNO Developer

- **Company:** FiveTwelve LLC
- **Location:** Howard County, MD, United States
- **Experience:** Experienced
- **Contract:** Temporary contract
- **Skills:** C (Programming Language), Java (Programming Language), .NET Framework, Microsoft Windows, Agile Methodology, Unix, C++ (Programming Language), Network Sockets, Configuration Management, Software Debugging, Perl (Programming Language), Intrusion Detection Systems, Python (Programming Language), Microsoft Visual Studio, Network Protocols, Reverse Engineering, WinDBg, Git, Build Management, IDA Pro, Software Coding, Software Version Control
- **Published:** October 18, 2026
- **Apply:** https://www.careerbuilder.com/job-details/windows-cno-developer-hanover-md--c923afba-e2a3-4ee5-8698-883360f005ce

## About the Role

* (U) Bachelor's Degree and six (6) years of experience OR minimum ten (10) years of experience in relevant field,
 * (U) Minimum eight (8) years of experience programming in Assembly, C, C++, Java, Perl, and/or Python,
 * (U//FOUO) Minimum seven (7) years of experience developing in one (1) or more of the following: Windows applications using Visual Studio or .NET environments; UNIX applications using make files or comparable build environments
 * (U) Minimum six (6) years of experience with programming CNO tools and techniques,
 * (U) Minimum five (5) years of experience managing and supervising teams in support of Government CNO capability development,
 * (U) Minimum five (5) years of experience programming CNO tools for the US Government,
 * (U//FOUO) Minimum four (4) years of experience programming techniques to evade host and/or network-based IDS, and
 * (U) Minimum four (4) years' experience in network sockets programming and application-level protocols.
Specialized Qualifications:

 * (U) Experience with designing and writing code in C++ along with Python,
 * (U) Experience reading or writing assembly (x86, x64, ARM, PPC, MIPS, SPAC, or others),
 * (U) Experience with debuggers such as WinDbg,
 * (U) Experience with reverse engineering tools such as IDA Pro, HexRays, Ghidra, Binary Ninja, or objdump,
 * (U) Understanding of Windows internals,
 * (U) Understanding of network protocols and sockets, OS internals, common CNO techniques, exploitation mitigations such as DEP and ASLR, and modern software engineering concepts,
 * (U) Experience with project management best practices such as Scrum and Kanban methodologies, and
 * (U) Experience with version control systems (e.g., Git) along with understanding of basic configuration management principles.
*MUST HAVE TS/ SCI w/ FSP

## Description

(U) The candidate will join a team of engineers designing, developing, testing, and maintaining Windows CNO capabilities in support of the Customer's mission requirements.Requirements* (U) Bachelor's Degree and six (6) years of experience OR minimum ten (10) years of experience in relevant field,* (U) Minimum eight (8) years of experience programming in Assembly, C, C++, Java, Perl, and/or Python,* (U//FOUO) Minimum seven (7) years of experience developing in one (1) or more of the following: Windows applications using Visual Studio or .NET environments; UNIX applications using make files or comparable build environments* (U) Minimum six (6) years of experience with programming CNO tools and techniques,* (U) Minimum five (5) years of experience managing and supervising teams in support of Government CNO capability development,* (U) Minimum five (5) years of experience programming CNO tools for the US Government,* (U//FOUO) Minimum four (4) years of experience programming techniques to evade host and/or network-based IDS, and* (U) Minimum four (4) years' experience in network sockets programming and application-level protocols.Specialized Qualifications:* (U) Experience with designing and writing code in C++ along with Python,* (U) Experience reading or writing assembly (x86, x64, ARM, PPC, MIPS, SPAC, or others),* (U) Experience with debuggers such as WinDbg,* (U) Experience with reverse engineering tools such as IDA Pro, HexRays, Ghidra, Binary Ninja, or objdump,* (U) Understanding of Windows internals,* (U) Understanding of network protocols and sockets, OS internals, common CNO techniques, exploitation mitigations such as DEP and ASLR, and modern software engineering concepts,* (U) Experience with project management best practices such as Scrum and Kanban methodologies, and* (U) Experience with version control systems (e.g., Git) along with understanding of basic configuration management principles.*MUST HAVE TS/ SCI w/ FSPBenefitsPTO: Our variable PTO plan lets you decide the amount that's best for you. Choose as few as 2 weeks or as much as 6 weeks.Holidays: 10 annually401k: 5% Company match; fully-vested from Day 1Quarterly Bonus: Totaling 2.5% of your base salary annuallyPay for any extra hours in cash or comp timePay for unused holidays or comp timeTraining Budget: Up to $5,250 annuallyCell Phone/Internet Allowance: Monthly reimbursement up to $75Gym/Health Club Membership: Monthly reimbursement up to $50Personal Technology Allowance: Up to $500 annuallyCool Logo Wear: At least $100 annuallyHealth Insurance: Provided through CareFirst Blue Cross/Blue Shield. Three plans to choose from - HSA Silver, HMO Platimun, PPO Platimum. FiveTwelve covers 80% of the premium for employees and their dependents.Dental and Vision Insurance: Provided through CareFirst Blue Cross/Blue Shield. FiveTwelve covers 100% of the premium for employees and their dependents.Short Term and Long Term Disability: FiveTwelve pays 100% of premiumReferral Bonus: Up to $10,000 for fully-cleared referrals
(U) The candidate will join a team of engineers designing, developing, testing, and maintaining Windows CNO capabilities in support of the Customer's mission requirements.
(U) The candidate will join a team of engineers designing, developing, testing, and maintaining Windows CNO capabilities in support of the Customer's mission requirements.

* (U) Bachelor's Degree and six (6) years of experience OR minimum ten (10) years of experience in relevant field,
* (U) Minimum eight (8) years of experience programming in Assembly, C, C++, Java, Perl, and/or Python,
* (U//FOUO) Minimum seven (7) years of experience developing in one (1) or more of the following: Windows applications using Visual Studio or .NET environments; UNIX applications using make files or comparable build environments
* (U) Minimum six (6) years of experience with programming CNO tools and techniques,
* (U) Minimum five (5) years of experience managing and supervising teams in support of Government CNO capability development,
* (U) Minimum five (5) years of experience programming CNO tools for the US Government,
* (U//FOUO) Minimum four (4) years of experience programming techniques to evade host and/or network-based IDS, and
* (U) Minimum four (4) years' experience in network sockets programming and application-level protocols.
Specialized Qualifications:

* (U) Experience with designing and writing code in C++ along with Python,
* (U) Experience reading or writing assembly (x86, x64, ARM, PPC, MIPS, SPAC, or others),
* (U) Experience with debuggers such as WinDbg,
* (U) Experience with reverse engineering tools such as IDA Pro, HexRays, Ghidra, Binary Ninja, or objdump,
* (U) Understanding of Windows internals,
* (U) Understanding of network protocols and sockets, OS internals, common CNO techniques, exploitation mitigations such as DEP and ASLR, and modern software engineering concepts,
* (U) Experience with project management best practices such as Scrum and Kanban methodologies, and
* (U) Experience with version control systems (e.g., Git) along with understanding of basic configuration management principles.
*MUST HAVE TS/ SCI w/ FSP
Referral Bonus: Up to $10,000 for fully-cleared referrals