ManTech International

Senior Information System Security Officer

ManTech International • $108K — $130K *
Huntsville, AL 35810In-Person
Information Technology
5 - 7 years of experience
Today
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Job Overview by Ladders

Qualifications

  • 7+ years as an Information Systems Security Officer at a cleared facility
  • 9+ years in computer science or cybersecurity fields
  • At least one IAM Level III certification (CISSP, GISP, CISM, CASP)
  • Experience with security tools (Tenable Nessus, IBM Guardium, NMAP)
  • Familiarity with NIST Risk Management Framework and ATO processes

Responsibilities

  • Implement and oversee security configuration daily
  • Serve as a liaison between system owners and IS security personnel
  • Maintain and update system security documentation continuously
  • Manage risks to information systems and coordinate corrective actions
  • Monitor security controls to maintain Authorized to Operate status
  • Report any changes affecting security authorization
  • Coordinate retirement of decommissioned information systems

Benefits

  • Offers supportive work environment
  • Opportunities for professional development
  • Access to advanced cybersecurity tools
  • Collaboration with experienced security professionals
  • Engagement in critical national security projects
Full Job Description
General information

Requisition #

R69397

Locations

USA-AL-Huntsville

Posting Date

07/21/2026

Security Clearance Required

TS/SCI

Remote Type

Onsite

Time Type

Full time

Description & Requirements

MANTECH seeks a motivated, career and customer-oriented Senior Information System Security Officer (ISSO) to join our team in Huntsville, Alabama.

Responsibilities include, but are not limited to:
  • Ensure the day-to-day implementation, oversight, continuous monitoring, and maintenance of the security configuration, practices, and procedures for each IS and that selected security controls are implemented and operating as intended during all phases of the IS lifecycle
  • Provide liaison support between the system owner and other IS security personnel
  • Ensure that system security documentation is developed, maintained, reviewed, and updated on a continuous basis; Conduct required IS vulnerability scans according to risk assessment parameters
  • Manage the risks to ISs and other FBI assets by coordinating appropriate correction or mitigation actions and oversee and track the timely completion of (POAMs). Coordinate system owner concurrence for correction or mitigation actions
  • Monitor security controls for FBI ISs to maintain security Authorized to Operate (ATO); Upload all security control evidence to the Governance, Risk, and Compliance (GRC) application to support security control implementation during the monitoring phase
  • Ensure that changes to an FBI IS, its environment, and/or operational needs that may affect the authorization status are reported to the system owner and IS Security Manager (ISSM)
  • Ensure the removal and retirement of ISs being decommissioned in coordination with the system owner, ISSM, and ISSR; Working knowledge of the National Institute of Standards and Technology (NIST) Risk Management Framework (RMF) and ATO processes


Minimum Qualifications:
  • At least 7 years serving as an Information Systems Security Officer (ISSO) at a cleared facility
  • AT least 9 years' experience in a computer science or Cybersecurity related field
  • Hold at least one of the following Information Assurance Management (IAM) Level III certifications: Certified Information Systems Security Professional (CISSP), Global Information Security Professional (GISP), Certified Information System Manager (CISM), or the CompTIA Advanced Security Practitioner (CASP) or equivalent certifications
  • Familiarity with the use and operation of security tools including Tenable Nessus and/or Security Center, IBM Guardium, HP Weblnspect, Network Mapper (NMAP), and/or similar applications


Preferred Qualifications:
  • A bachelor's or advanced degree in Computer Science, Cybersecurity, or other cyber discipline


Clearance Requirements:
  • Must have an active Top Secret clearance and be willing and able to obtain SCI eligibility prior to start.
  • Selected candidate must be willing to undergo a Polygraph.


Physical Requirements:
  • Must be able to remain in a stationary position 50%
  • Needs to occasionally move about inside the office to access file cabinets, office machinery, etc.
  • Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer
  • Often positions self to maintain computers in the lab, including under the desks and in the server closet
  • Frequently communicates with co-workers, management and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situations.

About ManTech International

ManTech International Corporation is an American defense contracting firm that was founded in 1968. The company provides cybersecurity, intelligence, and defense solutions to the United States Government. ManTech has over 9,000 employees and operates in 40 countries worldwide. The company's services include software development, systems engineering, and enterprise IT solutions. ManTech has been awarded numerous contracts by the U.S. Department of Defense and other government agencies.
Learn more about ManTech International
Size
9,800 employees
Market Cap
$3.7 billion
Industry
Information Technology
Net Income
$120.5 million
Founded
1968
5 Year Trend
+9.8%
Revenue
$2.5 billion
NASDAQ
MANT
* Ladders Estimates

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