Cleared Onsite Information Systems Security Officer (ISSO) – Sr (Cloud) (5274)

SMX is seeking a highly skilled Information Systems Security Officer (ISSO) – Sr (Cloud) to support a mission-critical federal program in Huntsville, AL. This individual will serve as a senior cybersecurity and cloud security resource responsible for supporting the security posture, compliance activities, and operational security requirements for enterprise cloud environments and associated information systems. The ideal candidate will have extensive experience supporting classified environments, implementing cybersecurity best practices, and working within complex federal IT infrastructures.

The selected candidate will work closely with engineering, cloud, infrastructure, and government stakeholders to ensure systems remain compliant with federal cybersecurity requirements while supporting operational mission needs. This role requires strong technical expertise across cloud security, vulnerability management, continuous monitoring, incident response support, and security assessment activities. This position is on site in Washington DC and an active Top Secret clearance is mandatory.

Essential Duties & Responsibilities:

• Serve as the primary ISSO supporting cloud-hosted and enterprise information systems within classified environments
• Support system security compliance activities in accordance with RMF, NIST, and federal cybersecurity standards
• Maintain and update security documentation including SSPs, POA&Ms, security control assessments, and related artifacts
• Coordinate and support ATO package development, continuous monitoring, and annual security review activities
• Perform vulnerability analysis, remediation tracking, and security reporting using enterprise security tools
• Monitor security posture and support incident response and audit activities as required
• Collaborate with system administrators, cloud engineers, developers, and government stakeholders to ensure secure system operations
• Conduct security assessments and evaluate system configurations against security baselines and compliance requirements
• Support implementation and management of cloud security controls across AWS, Azure, and/or GCP environments
• Analyze and evaluate security risks, recommend mitigations, and support remediation planning efforts
• Assist with security tool integration, log analysis, and monitoring activities across enterprise environments
• Support cybersecurity process improvement initiatives and contribute to security best practices across the program

Required Skills & Experience 

• Proficiency in SQL and a strong understanding of database systems.

• Active TS clearance required, SCI Eligible
• Minimum of 9 years of professional experience in cybersecurity, information assurance, or information systems security
• Minimum of 7 years of experience serving as an ISSO within a cleared federal environment
• Possess at least one of the following certifications:
• CISSP
• GISP
• CompTIA CASP
• Equivalent DoD 8570 IAM Level III certification
• Must possess at least one cloud security certification from AWS, Azure, or GCP, including one or more of the following:
• AWS Certified Security – Specialty
• AWS Certified Solutions Architect – Associate
• (ISC)² Certified Cloud Security Professional (CCSP)
• Microsoft AZ-500 Azure Security Engineer Associate
• Google Professional Cloud Security Engineer
• Experience supporting federal RMF and ATO processes
• Strong understanding of NIST security controls, vulnerability management, continuous monitoring, and federal cybersecurity requirements
• Hands-on experience with enterprise security and monitoring tools such as:
• Splunk
• Tenable Nessus
• IBM Guardium
• HP WebInspect
• Security Center
• NMAP
• Similar enterprise cybersecurity platforms
• Experience supporting cloud-based environments and associated security controls
• Strong analytical, troubleshooting, and problem-solving skills
• Ability to work independently and collaboratively in a fast-paced operational environment
• Strong written and verbal communication skills

Desired Skills & Experience 

• Bachelor’s degree in Computer Science, Cybersecurity, Information Technology, or related field
• Advanced degree preferred
• Experience supporting cloud environments within AWS GovCloud or other federal cloud platforms
• Familiarity with Agile delivery methodologies and DevSecOps practices
• Prior experience supporting FBI or other federal law enforcement/intelligence community environments preferred

Application Deadline:  6-27-2026

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 The SMX salary determination process takes into account a number of factors, including but not limited to, geographic location, Federal Government contract labor categories, relevant prior work experience, specific skills, education and certifications. At SMX, one of our Core Values is to Invest in Our People so we offer a competitive mix of compensation, learning & development opportunities, and benefits. Some key components of our robust benefits include health insurance, paid leave, and retirement.

The proposed salary for this position is:: $114,600 USD - $192,500 USD

At SMX®, we are a team of technical and domain experts dedicated to enabling your mission. From priority national security initiatives for the DoD to highly assured and compliant solutions for healthcare, we understand that digital transformation is key to your future success.

We share your vision for the future and strive to accelerate your impact on the world. We bring both cutting edge technology and an expansive view of what’s possible to every engagement. Our delivery model and unique approaches harness our deep technical and domain knowledge, providing forward-looking insights and practical solutions to power secure mission acceleration.

SMX is an Equal Opportunity employer including disabilities and veterans.

Selected applicant may be subject to a background investigation and/or education verification.

SMX does not sponsor a new applicant for employment authorization or immigration related support for this position (i.e. H1B, F-1 OPT, F-1 STEM OPT, F-1 CPT, J-1, TN, E-2, E-3, L-1 and O-1, or any EADs or other forms of work authorization that require immigration support from an employer).