Information System Security Officer (ISSO)

Contact Government Services, LLC; Washington (District of Columbia); On-site; USD 90,000 - 130,000; Full time

Benefits offered by this job

Health, Dental, and Vision

Life Insurance

401k

Flexible Spending Account

Paid Time Off

Job summary

Contact Government Services, LLC is seeking an Information System Security Officer (ISSO) to be embedded on-site with U.S. Government customers, ensuring secure operation of a production-grade data and application platform in mission-critical environments.

You will serve as the primary authority for system security and compliance, working hands-on with live systems and coordinating with engineers, operators, and customer security teams to maintain accreditation artifacts and support audits

Qualifications

• Background in systems administration, software development, or Linux-based systems.
• Experience accrediting IT systems against U.S. Government standards (NIST SP 800-53, CNSSI 1253, DISA STIGs).
• Hands-on accreditation support using eMASS or Xacta.
• Collaborates with engineering teams to implement security configurations.
• Familiar with configuration management and automation tools (Puppet, Terraform, CloudFormation, Chef, Ansible).
• Comfort with Git version control and vulnerability scanners (Nessus, OpenSCAP).
• Experience in cloud and on-prem environments (AWS).
• Strong technical documentation and attention to detail.
• Active TS/SCI Clearance or Eligibility.

Responsibilities

• Act as primary on-site contact for security/compliance for U.S. Government customers.
• Support system accreditation using RMF or DIACAP.
• Collaborate with engineers to implement security controls and policies.
• Analyze deployments for alignment with security requirements.
• Maintain SSPs, POA&Ms, control narratives, and artifacts.
• Generate and organize compliance evidence.
• Assemble accreditation artifacts into auditable repository.
• Support audits, assessments, and ongoing compliance across lifecycle.
• Maintain security and trust through hands-on system access with teams.
• Support software across AWS, Azure, and on-premises at multiple classifications.

Skills

On-site security liaison

RMF/DIACAP accreditation

Security controls implementation

Documentation

Accreditation artifacts management

Evidence generation/organization

Tools

eMASS

XACTA

Puppet

Terraform

CloudFormation

Chef

Ansible

Git

Nessus

OpenSCAP

AWS

Azure

Job description

Information System Security Officer (ISSO)

Employment Type: Full-Time, Mid-Level

Department: Administrative and Logistics Support

As a FSR ISSO, you will be embedded on-site with U.S. Government customers to ensure the secure, compliant operation of a production-grade data and application platform used in mission-critical environments. You will serve as the primary authority for system security and compliance—working hands-on with live systems while partnering closely with engineers, operators, and customer security teams.

CGS brings motivated, highly skilled, and creative people together to solve the government’s most dynamic problems with cutting-edge technology. To carry out our mission, we are seeking candidates who are excited to contribute to government innovation,appreciate collaboration, and can anticipate the needs of others. Here at CGS, we offer an environment in which our employees feel supported, and we encourage professional growth through various learning opportunities.

Skills and attributes for success:

• Act as the primary on-site point of contact for security and compliance requirements across one or more U.S. Government customers.

• Support system accreditation and authorization activities using frameworks such as RMF or DIACAP.

• Collaborate with software, systems, and field engineers to ensure required security controls, configurations, and policies are correctly implemented.

• Analyze deployed software implementations and assess alignment with applicable security requirements.

• Build, standardize, andmaintainsecurity documentation, including SSPs, POA&Ms, control narratives, and supporting artifacts.

• Generate,validate, and organize evidence of compliance once security settings are applied.

• Assemble accreditation artifacts into a structured, auditable repository.

• Support audits, assessments, and ongoing compliance activities throughout the system lifecycle.

• Maintain the ongoing security and trust of customers through hands-on system access and coordination with engineering and operations teams.

• Support softwareoperatingacross AWS, Azure, on-premises, and at multiple classification levels.

• Operate in environments where the platform, threat landscape, and operational needs are continuously evolving.

Qualifications:

-Background in systems administration, software development, systems engineering, or deep familiarity with Linux-based systems.

• Experience accrediting IT systems against U.S. Government standards such as NIST SP 800-53, CNSSI 1253, and DISA STIGs.

• Hands-on experience supporting accreditation usingeMASSorXacta.

• Experience collaborating with engineering teams to implement andvalidatesecurity configurations.

• Understanding ofconfiguration management and automation tools (e.g., Puppet, Terraform, CloudFormation, Chef, Ansible).

• Comfort using version control systems such as Git.

• Ability to independently use vulnerability scanning tools such as Nessus andOpenSCAP.

• Experience working in cloud and on-premises environments, including AWS.

• Strong ability to produce clear, concise technical documentation, stay organized, andmaintainattention to detail.

• Curiosity, critical thinking, and the ability to evaluate real-world implementations against formal security requirements.

• Active TS/SCI Clearance or Eligibility

Our Commitment:

Contact Government Services (CGS) strives to simplify and enhance government bureaucracy through the optimization of human, technical, and financial resources. We combine cutting-edge technology with world-class personnel to deliver customized solutions that fit our client’s specific needs. We are committed to solving the most challenging and dynamic problems.

For the past nine years, we’ve been growing our government-contracting portfolio, and along the way, we’ve created valuable partnerships by demonstrating a commitment to honesty, professionalism, and quality work.

Here at CGS we value honesty through hard work and self-awareness, professionalism in all we do, and to deliver the best quality to our consumers mending those relations for years to come.

We care about our employees. Therefore, we offer a comprehensive benefits package.

• Health, Dental, and Vision
• Life Insurance
• 401k
• Flexible Spending Account (Health, Dependent Care, and Commuter)
• Paid Time Off and Observance of State/Federal Holidays

Contact Government Services, LLC is an Equal Opportunity Employer. Applicants will be considered without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.

Join our team and become part of government innovation!

For more information about CGS please visit: https://www.cgsfederal.com

Email: [e-mail]