Cyber Threat Analyst

Company: Castalia Systems
Location: Arlington
Posted on: April 2, 2026

Job Description:

Job Type: Full- Time, Providing support during assigned shifts (M-F Day shift 1400-2230) Workplace Type : Onsite in Arlington, VA Clearance: Active TS/SCI clearance and ability to get DHS Suitability Must be a U.S. Citizen Benefits: Medical, dental, and vision coverage, 401k matching, generous PTO, paid holidays, professional training opportunities, and even pet insurance to ensure your furry friends are cared for too. Job Summary Castalia Systems is supporting a U.S. Government customer to provide support for onsite incident response to civilian Government agencies and critical asset owners who experience cyber-attacks, providing immediate investigation and resolution. Contract personnel perform investigations to characterize the severity of breaches, develop mitigation plans, and assist with the restoration of services. Castalia is seeking a Cyber Threat Analyst to support this critical customer mission. Roles and Responsibilities A qualified candidate will perform the following duties and responsibilities, but are not limited to: Researching and compiling known resolution steps or workarounds to enable mitigation of potential Computer Network Defense incidents within the enterprise Applying knowledge of the tactics, techniques, and procedures of various criminal, insider, hacktivist, and nation state threat actors to identify and validate threats Applying cybersecurity concepts to the detection and defense of intrusions into small, and large-scale IT networks, and conducting cursory analysis of log data Conducting cursory analysis of log data Monitoring external data sources (e.g., Computer Network Defense vendor sites, Computer Emergency Response Teams [CERTs], SANS, Security Focus) to maintain currency of Computer Network Defense threat condition and determine which security issues may have an impact on the enterprise Identifying the cause of an incident and recognizing the key elements to ask external entities when learning the background and potential infection vector of an incident Receiving and analyzing network alerts from various sources within the enterprise and determining possible causes of such alerts Tracking and documenting Computer Network Defense (CND) incidents from initial detection through final resolution Working with other components within the organization to obtain and coordinate information pertaining to ongoing incidents. Required Qualifications: 2 years of directly relevant experience in cyber incident management or cybersecurity operations BS Incident Management, Operations Management, Cybersecurity or related degree. HS Diploma with 4-6 years of incident management or cyber security experience. Knowledge of incident response and handling methodologies Knowledge of the NCCIC National Cyber Incident Scoring System to be able to prioritize triaging of incident Knowledge of general attack stages (e.g., foot printing and scanning, enumeration, gaining access, escalation of privileges, maintaining access, network exploitation, covering tracks, etc.) Skill in recognizing and categorizing types of vulnerabilities and associated attacks Knowledge of basic system administration and operating system hardening techniques Knowledge of Computer Network Defense policies, procedures, and regulations Knowledge of different operational threat environments (e.g., first generation [script kiddies], second generation [non-nation-state sponsored], and third generation [nation-state sponsored]) Knowledge of system and application security threats and vulnerabilities (e.g., buffer overflow, mobile code, cross-site scripting, PL/SQL and injections, race conditions, covert channel, replay, return- oriented attacks, and malicious code) Experience with cloud platforms such as AWS, Azure, or GCP Experience with scripting languages (Bash, Python, etc.) Desired Qualifications: Knowledge of basic system administration and operating system hardening techniques Knowledge of Computer Network Defense policies, procedures, and regulations Knowledge of different operational threat environments (e.g., first generation [script kiddies], second generation [non-nation-state sponsored], and third generation [nation-state sponsored]) Knowledge of system and application security threats and vulnerabilities (e.g., buffer overflow, mobile code, cross-site scripting, PL/SQL and injections, race conditions, covert channel, replay, return- oriented attacks, and malicious code) Physical Requirements/Work Environment Providing support during assigned shifts (M-F Day shift 1400-2230) Travel Must be able to work collaboratively across physical locations Company Description Castalia Systems is a proven business partner providing mission critical solutions to the Federal Government. We provide cutting edge solutions from Securing and Managing Data to Systems Engineering and Development. Castalia Systems is a pioneer in Artificial Intelligence Design and Application. With our vast knowledge of our customers? needs and relevant technology, our team can bring successful solutions to every mission. We are one-upping our competitors by providing premium IT solutions and platforms with cutting-edge technology so it?s very evident when you compare us with anyone. Disclaimer Castalia Systems is an equal employment opportunity and affirmative action employer and strives to comply with all applicable laws prohibiting discrimination based on race, color, creed, sex, sexual orientation, age, national origin, or ancestry, physical or mental disability, veteran status, marital status, HIV-positive status, as well as any other category protected by federal, state, or local laws. All such discrimination is unlawful, and all people involved in the operations of the company are prohibited from engaging in this type of conduct.

Keywords: Castalia Systems, Ellicott City , Cyber Threat Analyst, IT / Software / Systems , Arlington, Maryland