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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Systems Security Engineer III - **Company:** SNC LTD - **Location:** Lone Tree, CO, United States - **Experience:** Expert - **Salary:** $114,000.0 - $157,000.0 - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Active Directory, Domain Controllers, Antivirus Softwares, Cyber Security, Information Systems, Desktop Computing, Linux, Digital Forensics, Hypervisor, Information Security Management, Intrusion Detection Systems, Local Security Policy, Windows Servers, Public Key Infrastructure, Virtual Machines, C4ISR, Firewalls (Computer Science), Information Technology, CIS Benchmarks, Cisco, Vulnerability Analysis - **Published:** October 21, 2026 - **Apply:** https://www.builtincolorado.com/job/systems-security-engineer-iii/11778092?handler=ApplyRedirect ## About the Role * Bachelor's degree in Systems Security, Network Engineering, Information Technology, or related Engineering discipline * 5+ years of experience in IT security or a related field. * Relevant experience can be considered as a substitute for the required educational qualifications. In the absence of a degree, a minimum of 9 years of related experience is required. * Higher level relevant degree may substitute for experience. * Advanced understanding of cybersecurity principles and practices. * Experience with security frameworks and standards such as National Institute of Standards and Technology (NIST), ISO 27001. * Information System Security Officer (ISSO) Security+, Certified Information Systems Auditor (CISA), or CompTIA Advanced Security Practitioner (CASP+) Certification. * Current/Active Secret U.S. Security Clearance with the ability to obtain Top Secret U.S. Security Clearance with SCI Eligibility is required., * Information Systems Security Engineer Certified Authorization Professional (ISSE CAP) Certification. * Microsoft Certified Solutions Expert (MCSE), Linux, and/or Cisco Certified Network Professional (CCNP) Security Certification. * Experience with security tools such as firewalls, intrusion detection systems, and antivirus software. * Experience in the aerospace or defense industry. Essential Functions: * Ability to work primarily at a computer for extended periods. * Capability to participate in on-call rotation for incident response. * Must be able to lift up to 25 lbs occasionally. * Ability to work in an office or hybrid environment. * Occasional travel may be required. ## Description Lead the design, implementation, and maintenance of secure IT infrastructure. Harden Windows systems, Active Directory domains, hypervisors, and security configurations; manage PKI and Group Policy; conduct threat monitoring, vulnerability assessments, incident response, and digital forensics. Develop security controls, document breaches, evaluate security technologies, and mentor junior engineers. The role requires an active Secret clearance, ability to obtain Top Secret with SCI eligibility, and occasional travel. The summary above was generated by AI The ISR (Intelligence, Surveillance & Reconnaissance), Aviation, and Security (IAS) business area is a leader in ISR and aviation, it is a leading prime manned and unmanned aircraft systems integrator for innovative, high-performance ISR and aviation systems. Its end-to-end Command, Control, Computers, Communications and Intelligence, Surveillance & Reconnaissance (C4ISR) capabilities encompass design, integration, test, certification, ground/flight training and complete logistics support. IAS tailors solutions to customer cost, performance, and schedule requirements and designs to consistently exceed expectations - with an unrivaled record of on time and on (or under) budget deliveries. SNC has led thoughtful and disruptive change in the aerospace and defense industry for the past 60 years and now, we're applying this tenacity and expertise to the U.S. Air Force's (USAF) Survivable Airborne Operations Center (SAOC) mission. Join the SNC-led SAOC team and be a part of exciting and meaningful work to modernize and deliver the next-generation SAOC aircraft trusted by the President, Secretary of Defense and Chairs of the Joint Chiefs of Staff to ensure continued critical command, control and communication during national emergencies. If you're passionate about building the airborne command post of the future, consider SNC for your next mission. Learn more about NC3 and SAOC here. Are you looking for an opportunity to deepen your IT skills in a meaningful work environment that supports and protects explorers and heroes? Join our team! As a Systems Security Engineer III, you will play a pivotal role in ensuring the security of our IT infrastructure. You will lead the design, implementation, and maintenance of secure IT systems, and take charge of high-level incident response and digital forensics., * Lead the design and implementation of secure IT infrastructure. * Build and harden Windows virtual machines, Active Directory domains, and hypervisors using strict security baselines and best practices. * Maintain the security of the Active Directory forest, including managing trust relationships, domain controllers, and certificate services (PKI). * Create, test, and deploy strict Group Policy Objects (GPOs) to enforce security settings across all Windows servers and workstations. * Perform advanced security monitoring and threat analysis. * Direct and manage complex incident response and digital forensics. * Conduct in-depth risk and vulnerability assessments. * Develop and enforce comprehensive security controls and protocols. * Research, evaluate, and recommend new security technologies. * Oversee security breach documentation and impact analysis. * Provide mentorship and guidance to junior security engineers.