Full-Time

Information Systems Security Engineer

Posted on 5/12/2026

CACI

CACI

10,001+ employees

Provides government contracting technology and services

Compensation Overview

$103.8k - $218.1k/yr

No H1B Sponsorship

Chantilly, VA, USA

In Person

Up to 10% travel within the Continental US.

US Top Secret Clearance Required

Category
IT & Security (1)
Required Skills
Operating Systems
Cryptography
penetration testing
Requirements
  • 12+ Years of relevant experience (bachelor’s degree in applicable field may be substituted for 5 years of experience)
  • Required DoD 8140 IAT level II compliant certification such as CompTIA Security+
  • Secret Clearance
  • Proven experience as a Security Engineer or in a similar role, with expertise in information security practices and technologies.
  • Strong knowledge of network security, operating systems, databases, and application security principles.
  • Familiarity with industry security standards and frameworks such as NIST or DoD Controls
  • Experience with vulnerability scanning and penetration testing tools.
  • Ability to analyze security incidents, perform root cause analysis, and propose effective solutions.
  • Knowledge of encryption technologies, access controls, and identity and access management (IAM) principles.
  • Excellent communication and problem-solving skills to collaborate effectively with cross-functional teams.
  • Experience working in secure areas and on configuring classified systems.
  • Dedication to staying current with emerging cybersecurity trends and threats.
Responsibilities
  • Security Implementation: Design, deploy, and configure security configurations, such as MFA, centralized logging, encryption mechanisms, and access control systems, to protect the organization's information systems.
  • Vulnerability Assessment and Audits: Conduct regular vulnerability assessments and audits to identify weaknesses in the IT infrastructure and applications. Analyze results and collaborate with IT teams to remediate identified security gaps.
  • Incident Response and Threat Mitigation: Develop and implement incident response procedures to respond effectively to security incidents. Monitor and analyze security logs and alerts to detect and mitigate potential threats promptly.
  • Security Policy and Standards Development: Assist in the creation, review, and enforcement of information security policies, standards, and guidelines. Ensure compliance with industry best practices and regulatory requirements.
  • Security Compliance Monitoring: Monitor and track compliance with security policies and procedures, conducting periodic audits and assessments to ensure adherence to established security standards.
  • Secure Network Architecture: Design and implement secure network architectures, segmenting critical data and systems from less sensitive resources to minimize attack surfaces and potential impact.
  • Security Incident Investigation: Lead investigations into security breaches, identifying the root cause and recommending preventive measures to enhance security posture.
  • Data Protection and Privacy: Implement data protection measures, encryption techniques, and privacy controls to safeguard sensitive data and comply with relevant data protection regulations.
Desired Qualifications
  • Other relevant cybersecurity certifications like Certified Information Systems Security Professional (CISSP) or Certified Information Security Manager (CISM).
  • Understanding of regulatory requirements related to information security (e.g., GDPR, HIPAA) is advantageous.
  • Familiarity with cloud security concepts and solutions is a plus.
  • Dedication to staying current with emerging cybersecurity trends and threats.

CACI International Inc. provides technology and professional services to U.S. government clients, focusing on national security and modernization. It earns most of its revenue through long-term government contracts that fund engineering, intelligence, logistics, cybersecurity, data analytics, and IT solutions for defense, intelligence, and federal civilian agencies. Its products and services work by delivering specialized technical expertise, secure systems, and mission-support capabilities that help agencies run operations more efficiently and securely. CACI differentiates itself through its deep domain knowledge in national security, a proven track record of delivering high-quality, reliable solutions, and a skilled workforce that can execute complex, long-duration contracts. The company’s goal is to be a trusted partner for government modernization needs by providing advanced technology solutions and mission support that enhance national security and operational effectiveness.

Company Size

10,001+

Company Stage

IPO

Headquarters

Reston, Virginia

Founded

1962

Simplify Jobs

Simplify's Take

What believers are saying

  • Q3 FY2026 revenue hit $2.4B, up 8.5%, with raised FY guidance to $9.55B.
  • $306M DLA Global Model and $287M Army contracts boost backlog.
  • ARKA Group acquisition and AWS MSP status expand high-growth capabilities.

What critics are saying

  • Leidos captures 15% more DoD IT awards in Q1 2026 via AI scale.
  • 95% government revenue faces FY2027 DoD sequestration cuts of $1.5-2B.
  • DoD Audit Act bars CACI from 40% awards by 2028 on compliance failure.

What makes CACI unique

  • CACI delivers optical communications for NASA's Artemis II mission.
  • CACI provides specialized C4ISR and cyber solutions to US defense agencies.
  • CACI's 63-year legacy in simulation and IT integration sets it apart.

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Benefits

Health Insurance

Flexible Work Hours

401(k) Retirement Plan

401(k) Company Match

Wellness Program

Company News

Yahoo Finance
Apr 10th, 2026
CACI wins $287M Army tech contract to modernize personnel and pay system

CACI International has secured a seven-year $287 million contract to modernise the US Army's Integrated Personnel and Pay System-Army, supporting over one million users. The company also confirmed its optical communications hardware played a central role in NASA's Artemis II mission. The defence technology contractor is scheduled to release Q3 FY2026 earnings on 22 April, with consensus expecting mid-single to low-double digit revenue and earnings growth. Analysts project CACI could reach $10.9 billion in revenue and approximately $684 million in earnings by 2028. The contract reinforces CACI's position as a federal technology partner in defence and space programmes, though the company remains heavily reliant on US government budgets. The investment narrative centres on execution of large, high-value contracts whilst managing federal spending exposure.

Yahoo Finance
Apr 9th, 2026
CACI delivers laser comms and sensing tech to NASA's Artemis II crewed Moon mission

CACI International has contributed optical communications and sensing technology to NASA's Artemis II mission, the first crewed flight of the Space Launch System rocket and Orion spacecraft. The company developed an optical communications modem module in partnership with MIT Lincoln Laboratory, integrated into the Orion Artemis II Optical Communications System payload. The O2O system successfully delivered high-definition video and data from the lunar vicinity to Earth via laser link, marking a milestone in deep-space communications. Through its acquisition of ARKA Group, CACI also supplied cryogenic-level sensing technology for the SLS rocket, supporting propellant-level measurement and engine shutdown determination during ascent. CACI's hardware is developed across multiple US locations, including Danbury, Connecticut, and Florham Park, New Jersey.

CACI International Inc
Mar 13th, 2026
CACI Closes $500 Million Offering of 6.375% Senior Notes

CACI International Inc ( NYSE: CACI ) today announced it closed a $500 million offering of 6.375% unsecured senior notes due in 2033 (the “notes”). The notes will be issued as part of the same series as CACI’s 6.375% senior notes due 2033 originally issued in June 2025. CACI intends to use the net proceeds from the offering to repay certain indebtedness under its revolving credit facility that was incurred to pay a portion of the purchase price of its acquisition of ARKA Group L.P. and costs and expenses related thereto. About CACI CACI International Inc (NYSE: CACI) is a national security company with 27,000 talented employees who are Ever Vigilant in expanding the limits of national security. We ensure our customers’ success by delivering differentiated technology and distinctive expertise to accelerate innovation, drive speed and efficiency, and rapidly anticipate and eliminate threats. Our culture drives our success and earns us recognition as a Fortune World's Most Admired

Mammoth Times
Mar 12th, 2026
CACI closes $500M bond offering to fund ARKA Group acquisition debt repayment

CACI International has closed a $500 million offering of 6.375% unsecured senior notes due in 2033. The notes will be issued as part of the same series as CACI's 6.375% senior notes originally issued in June 2025. The company intends to use the net proceeds to repay indebtedness under its revolving credit facility, which was incurred to finance its acquisition of ARKA Group L.P. and related costs. CACI is a national security company with 27,000 employees. The firm is a member of the Fortune 500, the Russell 1000 Index and the S&P MidCap 400 Index.

Yahoo Finance
Mar 11th, 2026
CACI surges 180% in 5 years on strong EPS growth, but weak backlog points to demand concerns

CACI International, a defence and intelligence solutions provider, has surged 180% over the past five years, reaching $630.12 per share and outperforming the S&P 500's 72.6% total return. The stock has gained 29.6% in the last six months. The company demonstrated solid long-term performance with revenue growing at 8.8% compound annual growth rate over five years. More impressively, earnings per share expanded at 14% annually, indicating improved profitability. However, CACI's backlog growth has been weak, averaging just 3.6% year-on-year over the last two years. This underwhelming performance suggests increasing competition may be challenging the company's ability to secure new orders. The stock currently trades at 20.6× forward price-to-earnings ratio.