Cyber Defense Analyst - 2nd Shift (TS/SCI)

Leidos; Suitland (MD); On-site; USD 87,000 - 157,000; Full time

Job summary

Leidos is seeking a Cyber Defense Analyst (2nd Shift) to monitor and investigate cybersecurity alerts, supporting TS/SCI networks at ONI HGCC in Suitland, MD. You will perform first-line monitoring, threat hunting, and incident ticketing while communicating findings to stakeholders.

The role requires a TS/SCI clearance, strong CND discipline experience, and hands-on work with SIEMs, NIDS/NIPS, and host-based tools. Expect 2nd shift hours 1530–2330 and occasional float coverage.

Qualifications

• Bachelor’s degree in Cybersecurity/IT/IA with 4+ years of experience, or Master’s with 2+ years.
• Active TS/SCI security clearance required.
• Concentrated experience in the CND discipline regardless of degree.
• Experience monitoring and investigating alerts from cybersecurity tools.
• Experience with SIEM systems such as Splunk and Elastic.
• Experience with NIDPS like Cisco FirePower and Palo Alto NGFW and host-based tools Trellix ePO, Defender, and Tanium.
• Knowledge of scripting languages: Python, Perl, Ruby, JavaScript, PowerShell, C, C++, Java.
• Knowledge of pentesting tools (Kali, SamuraiWTF, Nmap, Burp Suite, sqlmap, Metasploit).
• Knowledge of ticketing systems, report writing, and intelligence gathering and dissemination techniques.
• Strong analytical, conceptual, and problem-solving skills.

Responsibilities

• Monitor security tools for alerts on TS/SCI networks.
• Investigate alerts and escalate to Tier 2 as needed.
• Create and manage incident and event tickets.
• Conduct proactive threat hunting activities.
• Perform wireless security scans and report findings.
• Correlate alerts across platforms to identify patterns and threats.
• Prepare and deliver operational and situational briefings.
• Support annual cyber defense exercises.

Skills

CND discipline

SIEM: Splunk

SIEM: Elastic

NIDPS

FirePower

NGFW

Trellix ePO

Microsoft Defender

Tanium

Python

Perl

Ruby

JavaScript

PowerShell

C

C++

Java

Penetration testing

Kali

SamuraiWTF

Nmap

Burp Suite

sqlmap

Metasploit

Education

Bachelor’s degree in Cybersecurity/IT/IA (4+ years)

Master’s degree with 2+ years

Active TS/SCI clearance

Tools

Cisco FirePower

Palo Alto NGFW

Trellix ePO

Microsoft Defender

Tanium

Kali

Nmap

Burp Suite

sqlmap

Metasploit

Job description

Leidos is seeking a Cyber Defense Analyst (2nd Shift) to monitor and investigate cybersecurity alerts, supporting TS/SCI networks at ONI HGCC in Suitland, MD. You will perform first-line monitoring, threat hunting, and incident ticketing while communicating findings to stakeholders.

The role requires a TS/SCI clearance, strong CND discipline experience, and hands-on work with SIEMs, NIDS/NIPS, and host-based tools. Expect 2nd shift hours 1530–2330 and occasional float coverage.