ManTech International

Information System Security Engineer

ManTech International • $108K — $130K *
Quantico, VA 22134In-Person
Information Technology
Less than 5 years of experience
Today
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Job Overview by Ladders

Qualifications

  • High school diploma/GED with 14 years, Associate's with 7, Bachelor's with 5, or Master's with 3 years of experience in cybersecurity.
  • Certification in CISSP, CASP CE, CSSLP, or related security credentials required.
  • Experience with security tools like Tenable Nessus, IBM Guardium, and NMAP preferred.
  • Knowledge of NIST RMF and ATO processes essential.
  • Active Top Secret clearance required, eligible for SCI.

Responsibilities

  • Identify information protection needs for IS and Network Environment.
  • Design security architectures and develop cybersecurity products.
  • Implement security with Cross Domain Solutions (CDS).
  • Create security designs for network systems addressing cybersecurity requirements.
  • Develop network security measures ensuring confidentiality and integrity.
  • Create interface specifications and propose mitigations for vulnerabilities.
  • Support incorporation of FBI-directed cybersecurity solutions.

Benefits

  • Opportunity to work in a critical national security environment.
  • Collaborate with experienced professionals in cybersecurity.
  • Access to advanced security tools and technologies.
  • Involvement in high-stakes cybersecurity projects.
  • Potential for career growth and specialization in cybersecurity.
Full Job Description
General information

Requisition #

R69749

Locations

USA-VA-Quantico, USA-AL-Huntsville

Posting Date

08/03/2026

Security Clearance Required

TS/SCI

Remote Type

Onsite

Time Type

Full time

Description & Requirements

MANTECH seeks a motivated, career and customer-oriented Information System Security Engineer (ISSE) to join our team in Washington, D.C., Chantilly, VA, Quantico, VA, or Huntsville, AL.

Responsibilities include, but are not limited to:
  • Identify information protection needs for an IS and Network Environment. Define IS and Network Environment security requirements in accordance with applicable cybersecurity requirements
  • Design security architectures for use within the IS and Network Environment. Design and develop cybersecurity-enabled products for use within an IS and Network Environment
  • Integrate and/or implement security with Cross Domain Solutions (CDS) for use within an IS and Network Environment
  • Develop and implement security designs for new or existing network system(s). Ensure that the design of hardware, operating systems, and software applications adequately address cybersecurity requirements for the IS and Network Environment
  • Design, develop, and implement network security measures that provide confidentiality, integrity, availability, authentication, and non-repudiation. Design, develop, and implement specific cybersecurity countermeasures for the IS and Network Environment
  • Develop interface specifications for the IS and Network Environment. Develop approaches to mitigate IS and Network Environment vulnerabilities and recommend changes to network or network system components as needed
  • Ensure that network system(s) designs support the incorporation of FBI directed cybersecurity vulnerability solutions


Minimum Qualifications:
  • Must meet one of the following levels of experience: A high school diploma/GED and 14 years' experience, an Associate's degree and 7 years' experience, a Bachelors degree and five years' experience, or a Master's and 3 years' experience.
  • Hold at least one of the following certifications: Certified Information Systems Security Professional (CISSP) (or Associate), CompTIA Advanced Security Practitioner (CASP) CE, Certified Secure Software Lifecycle Professional (CSSLP), CISSP- Information System Security Engineering Professional (ISSEP), or CISSP- Information System Security Architecture Professional (ISSAP).
  • Familiarity with the use and operation of security tools including: Tenable Nessus and/or Security Center, IBM Guardium, HP WeblInspect, Network Mapper (NMAP), and/or similar applications.
  • Working knowledge of the National Institute of Standards and Technology (NIST) Risk Management Framework (RMF) and ATO processes.


Preferred Qualifications:
  • Degree in Computer Science, Cybersecurity, or other cyber discipline.


Security Clearance Requirements:
  • Must have a current/active Top Secret security clearance with eligibility to obtain SCI prior to starting this position.
  • 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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