About the role#
MANTECH is hiring Computer Network Operations (CNO) Developer Interns for the Summer 2027 term. You will support a national security program by designing and developing technologies to defend, attack, and exploit networks. This is a full-time, hands-on role where you will work on guided projects that contribute to real-world contracts.
What you'll do#
- Write mission-critical software using Python, C, C++, and Assembly.
- Build skills in low-level programming, reverse engineering, embedded development, and security research.
- Engage in penetration testing, networking, and capability development.
- Collaborate with teams to solve complex technical challenges.
What you'll need#
- U.S. Citizenship and the ability to obtain a U.S. Security Clearance.
- Current enrollment in a full-time BS or MS program in Computer Science, Computer Engineering, or a related field.
- A graduation date no earlier than December 2027.
- Proficiency in at least one of these languages: Python, C++, C, or Assembly.
- Academic or professional experience in areas such as hacking, reverse engineering, or networking.
- A strong interest in a coding-heavy, hands-on environment.
- Preferred: Active TS/SCI with Polygraph clearance, knowledge of TCP/IP and socket programming, familiarity with x86 Assembly, and experience with Atlassian tools like JIRA or Confluence.
Location & details#
- This is a paid, full-time internship.
- The work modality is hybrid.
- Locations: Herndon, VA; San Antonio, TX; and Aurora, CO.
About MANTECH
ManTech provides IT system data services for the defense, intelligence, and commercial sectors. Founded in 1968, the company focuses on cybersecurity, systems engineering, and data analytics. It maintains headquarters in Herndon, Virginia. The organization employs over 10,000 people globally.
How to get in at MANTECH
Securing an internship at ManTech requires timing, as roles in defense and intelligence often fill quickly. Intern Insider sends an instant alert the moment a role matching your target is published, which helps you apply among the first. Getting your application in before the pile grows is a distinct advantage in this competitive field. You can also use Intern Insider to surface the recruiters behind ManTech roles. Reaching out directly to ask about the position or a referral often improves your response rate compared to waiting in a general queue. It is a practical way to show genuine interest to the people actually hiring.


