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Information System Security Officer (ISSO)

Castalia Systems
paid holidays, 401(k)
United States, North Carolina, Morrisville
Dec 12, 2025

Job Type: Full- Time

Workplace Type: Remote in the areas of Morrisville, NC or Falls Church, VA

Clearance: Public Trust

Must be a U.S. Citizen

Benefits: Medical, dental, and vision coverage, 401k matching, generous PTO, paid holidays, professional training opportunities, and even pet insurance to ensure your furry friends are cared for too.

Job Summary

Castalia Systems is seeking an Information System Security Officer (ISSO) to join our team in support of our customer. The ISSO will have the ability to manage responsibility for security assessments of a variety of applications or domains, to include cloud computing, and to manage several project/initiatives of large size, complexity, and risk. The ISSO will have In-depth understanding of security architecture principles and best practices to design, implement, and maintain secure IT infrastructures in alignment with A&A policies.

Roles and Responsibilities

A qualified candidate will perform the following duties and responsibilities, but are not limited to:



  • Ability to manage responsibility for security assessments of a variety of applications or domains, to include cloud computing, and to manage several project/initiatives of large size, complexity, and risk.
  • Demonstrated proficiency in implementing security controls, conducting risk assessments, and documenting compliance measures based on NIST RMF and ISO standards to meet organizational and regulatory requirements.
  • Demonstrated proficiency in successfully evaluating and supporting documentation, validation, and accreditation processes necessary to assure that new and existing information technology (IT) systems meet the organization's information assurance (IA) and security requirements.
  • Demonstrated proficiency in ensuring appropriate treatment of risk, compliance, and assurance from internal and external perspectives.
  • Demonstrated ability to support development of actionable security blueprints, principles, models, designs, standards, and guidelines to ensure enterprise IT architecture and support is consistent, usable, secure and adds value to the business.
  • Experience with network and vulnerability scanning tools and technologies to interrogate systems for configuration and status.
  • In-depth understanding of security architecture principles and best practices to design, implement, and maintain secure IT infrastructures in alignment with A&A policies.
  • Demonstrated proficiency in utilizing Governance, Risk, and Compliance (GRC) tools for managing Assessment & Authorization (A&A) processes.
  • Ability to serve as subject matter expert (SME) for the USPS A&A process, including providing guidance to stakeholders, business units, and new A&A resources as necessary.
  • Strong organizational skills and ability to build and maintain schedules and step-by-step action plans.
  • Effective communication and collaboration skills to work with cross-functional teams, business units, stakeholders, and IT professionals, and to brief executives.


Required Qualifications:



  • A minimum of eight (8) to twelve (12) years' relevant experience.
  • A degree from an accredited College/University in the applicable field of services is required. If the individual's degree is not in the applicable field then four additional years of related experience is required.
  • Typically performs all functional duties independently.


Physical Requirements/Work Environment

Travel



  • As needed


Company Description

Castalia Systems is a proven business partner providing mission critical solutions to the Federal Government. We provide cutting edge solutions from Securing and Managing Data to Systems Engineering and Development. Castalia Systems is a pioneer in Artificial Intelligence Design and Application.

With our vast knowledge of our customers' needs and relevant technology, our team is able to bring successful solutions to every mission. We are one-upping our competitors by providing premium IT solutions and platforms with cutting-edge technology so it's so evident when you compare us with anyone.

Disclaimer

Castalia Systems is an equal employment opportunity and affirmative action employer and strives to comply with all applicable laws prohibiting discrimination based on race, color, creed, sex, sexual orientation, age, national origin, or ancestry, physical or mental disability, veteran status, marital status, HIV-positive status, as well as any other category protected by federal, state, or local laws. All such discrimination is unlawful, and all persons involved in the operations of the company are prohibited from engaging in this type of conduct.

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