• Location: McLean, Virginia
  • Type: Contract
  • Job #3081

Title: Cyber Security Analyst
Location: Mclean, VA
*Clearance: *Active TS/SCI w/ Polygraph needed to apply *
Company Overview:
Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities of the U.S. Government.  Realizing early on that our most prized assets are our employees, we continually focus our attention on improving the overall work/life experience they have supporting the mission.  Our Team is pushed every day to use their industry leading knowledge to provide end-to-end solutions to combat our nation’s toughest and most secure problems.  If you are looking for a place to not only be professionally challenged, but encouraged and supported by a company that cares, don’t look any further than Cornerstone Defense.

Responsibilities include, but are not limited to:

Creation, editing, and management of signatures, custom rules and filters for specialized network defense systems including but not limited to:

Network and host-based IDS, IPS, firewall, web application firewall



SIEM systems

Manage and administer the tuning of rules, signatures, and custom content for specialized CND applications and systems

Identify potential conflicts with implementation of any CND tools within the enterprise and develop recommendations to remediate these conflicts

Participate in inter-agency relationships with partner organizations to facilitate mission execution

Provide innovation and creative solutions to challenging problems

Provide logical use case development

Provide and track requirements to engineering partners

Identify gaps in visibility or coverage of cyber defense systems

Prepare data analytics and reporting

Detection Assurance and rule validation

Required Qualifications:

2+ years of experience in Cyber Security, InfoSec, Security Engineering or Network Engineering with emphasis in cyber security issues and operations, computer incident response, systems architecture, data management

Experience with Mitre ATT&CK

Experience using computer programming language(s) such as Python, JavaScript, Yara or Snort

Familiarity with the following classes of enterprise cyber defense technologies:

Security Information and Event Management (SIEM) systems (Splunk and/or Splunk Enterprise Security)


Network Intrusion Detection System/Intrusion Prevention Systems (IDS/IPS)

Host Intrusion Detection System/Intrusion Prevention Systems (EDR/IDS/IPS)

Network and Host malware detection and prevention (EDR/NDR)

Network and Host forensic applications

Web/Email gateway security technologies



Ability to demonstrate expertise utilizing SIEM tools for use case development and application

DOD 8570 IAT Level I or CSSP-IR Certification (can be obtained after hire)

Active TS/SCI with polygraph clearance

Preferred Qualifications:

Bachelor’s Degree in Electrical Engineering, Computer Engineering, Computer Science, or other closely related Information Technology field of study

Ability to demonstrate interpersonal, organizational, writing, communications, and briefing skills

Ability to effectively use analytical and problem-solving skills


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