Navy NEC · IT & Cyber

H33A Cyber Network Defense Infrastructure Specialist (CNDIS)

Current service use not established

This code is listed in the directory. Inclusion alone does not confirm current service use.

A Navy Enlisted Classification: a skill designation sailors hold in addition to their rating.

Overview

A Cyber Network Defense Infrastructure Specialist configures hardware and applications to interface with defended networks and information systems during defensive cyberspace operations. They assess configurations, logs, policies, controls, and security practices, maintain deployable support and virtual training environments, and recommend vulnerability mitigations to system owners and local defenders.

Minimum clearance: Top Secret, often with SCI exposure

Core Skills

Critical cyber infrastructure identification
Configuration posture and vulnerability assessment
Log and security control evaluation
Deployable system and virtual environment configuration

Civilian Career Paths

Career associations are editorial assessments of the cited evidence, not an official crosswalk unless the evidence explicitly says so. O*NET supplies civilian occupation information, not proof of a military match. Related experience does not confer civilian qualifications. Tasks and tools below describe civilian work, not military training.

Information Security Engineers

Assessing defended-network configurations, evaluating security controls, and helping system owners implement mitigations transfer directly to security engineering work.

How to prepare: Build an isolated network lab and document a vulnerability assessment, configuration changes, and retest results demonstrating that the mitigations worked.

What the civilian work involves

Coordinate monitoring of networks or systems for security breaches or intrusions.
Assess the quality of security controls, using performance indicators.
Scan networks, using vulnerability assessment tools to identify vulnerabilities.

Civilian tools and software (examples)

Linux
Microsoft Active Directory
Microsoft PowerShell

Network and Computer Systems Administrators

Configuring hardware and applications and maintaining deployable mission systems and virtual training environments transfer to network and systems administration.

How to prepare: Create a small virtual server environment and practice configuration baselines, backup restoration, and troubleshooting, documenting the procedures and results.

What the civilian work involves

Maintain and administer computer networks and related computing environments, including computer hardware, systems software, applications software, and all configurations.
Diagnose, troubleshoot, and resolve hardware, software, or other network and system problems, and replace defective components when necessary.

Civilian tools and software (examples)

Linux
Microsoft Active Directory
Bash

Notes & Sources

Evidence for this guidance (3 documents)

NAVPERS 18068F Vol II (NEOCS, Jul 2026 edition): NEC H33A
[1] NEC entry "H33A - Cyber Network Defense Infrastructure Specialist (CNDIS)"; cached text line 6309; NAVPERS 18068F Vol II, 2026-07 edition
Supports: Critical cyber infrastructure identification, Configuration posture and vulnerability assessment, Log and security control evaluation, Deployable system and virtual environment configuration, Information Security Engineers (O*NET 15-1299.05), Network and Computer Systems Administrators (O*NET 15-1244.00)
O*NET: Information Security Engineers
[2] O*NET 30.3 occupational data
Supports: Information Security Engineers (O*NET 15-1299.05)
O*NET: Network and Computer Systems Administrators
[3] O*NET 30.3 occupational data
Supports: Network and Computer Systems Administrators (O*NET 15-1244.00)

Defense contractor jobs for H33A

Descriptions may be summarized for clarity. Verify all information with your branch career counselor or official military documentation before making career decisions.

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