Information Systems Security Engineer (ISSE) - Senior CACI is seeking highly skilled Information Senior Systems Security Engineers (ISSE) to join our cybersecurity team supporting U.S. Southern Command (USSOUTHCOM) in Doral, Florida. This role will be responsible for designing, implementing, and maintaining secure information systems and networks for USSOUTHCOM. This position is contingent upon award of the USSOUTHCOM Cyber Information Technology Enterprise Services (SCITES) contract. Responsibilities include: Design and implement secure network architectures, including firewalls, intrusion detection/prevention systems, and VPNs Conduct security assessments and penetration testing to identify vulnerabilities in systems and networks Develop and maintain security policies, procedures, and best practices in alignment with DoD and USSOUTHCOM requirements Perform risk assessments and recommend mitigation strategies to address identified security gaps Support the Risk Management Framework (RMF) process, including system categorization, control selection, and assessment activities Collaborate with cross-functional teams to ensure security is integrated into all aspects of IT operations Provide technical expertise on information security matters to leadership and stakeholders Monitor and analyze security events, and participate in incident response activities as needed Stay current with emerging cyber threats and security technologies, recommending improvements to USSOUTHCOM's security posture Qualifications: Required: Bachelor's degree in Computer Science, Information Security, or related field of study 7+ years of experience in information systems security engineering Strong knowledge of network security principles, protocols, and technologies Experience with security tools such as firewalls, IDS/IPS, SIEM, and vulnerability scanners Familiarity with DoD security policies, NIST guidelines, and the RMF process Excellent problem-solving and communication skills US citizen with active Secret security clearance Desired: CISSP, CASP+, or GIAC Security Expert (GSE) What You Can Expect: A culture of integrity. At CACI, we place character and innovation at the center of everything we do. As a valued team member, you'll be part of a high-performing group dedicated to our customer's missions and driven by a higher purpose - to ensure the safety of our nation. An environment of trust. CACI values the unique contributions that every employee brings to our company and our customers - every day. You'll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality. A focus on continuous growth. Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground - in your career and in our legacy. Your potential is limitless. So is ours. Learn more about CACI here. Pay Range: There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits. Learn more here. The proposed salary range for this position is: $98,500-$206,800. CACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.