Tier I Intrusion Analyst

Las Vegas, NV

At Criterion Systems, we developed a different kind of business—a company whose real value is a reputation for excellence built upon the collective skills, talents, perspectives, and backgrounds of its people. By accepting a position with Criterion Systems, you will join a group of professionals with a collaborative mindset where we share ideas and foster professional development to accomplish our goals. In addition to our great culture, we also offer competitive compensation and benefit packages, company-sponsored team building events, and advancement opportunities. To find out more about how Criterion can help you take your career to the next level please visit our website: www.criterion-sys.com.
Our staff provides cyber security support to the Department of Energy National Nuclear Security Administration.

Criterion Systems is seeking to hire a Tier 1 Intrusion Analyst to support a federal government customer in Las Vegas, Nevada.

The candidate will be a member of a Security Operations Center (SOC) working in a 24x7 operational environment. This position requires daily interaction with management, security personnel at customer sites, and government personnel with other federal agencies. Applicant must be a positive, flexible, self-starter requiring minimal direct supervision, and able to excel in the fast-paced cybersecurity industry. Strong communication and interpersonal skills are a necessity; including the ability to effectively communicate via written and verbal mediums. Fundamental business and technical writing skills are a must. Position may include up to 10% travel both locally and nationwide. Applicants must be detail-oriented, self-driven, and be able to multi-task on a high-tempo operational team.

Duties and Responsibilities:

  • Employ computer network defense best practice by monitoring, triaging, and responding to cybersecurity alerts within a dynamic operational work environment. 
  • Communicate with customer contacts to effectively relay time-sensitive security event and incident information. 
  • Research emerging threats and apply proactive investigative measures to predict actions by adversarial threat actors. 
  • Develop and maintain in-depth knowledge of industry trends, vulnerability releases, adversarial TTPs, and malware campaigns. 
  • Translate investigative results into threat indicators and custom behavioral signatures within intrusion prevention and detection systems. 
  • Continually learn and evolve as a member of a team of highly motivated cybersecurity professionals.

  • Provide other services to include, but not limited to:

  • Triage of alerts in support of network security monitoring operations
  • Review and analyze network packet capture files
  • Review and analyze IDS/IPS alerts 
  • Review of security vulnerability data
  • Utilize threat hunting techniques to proactively identify threat activity
  • Identification, review, and tracking of malicious code
  • Reporting malicious activity to customer sites
  • Provide customers with remediation recommendations
  • Review and management of incident response activity
  • Creation of procedural documentation
  • Other duties as assigned
  • Travel up to 10%

Required Qualifications:

  • Bachelor's Degree in Computer Science, Information Systems, Information Security or related technical discipline OR four (4) years professional IT experience may be used in lieu of degree.
  • Three (3) years of technical experience with cybersecurity elements
  • Active Department of Energy (DOE) “Q” Clearance OR Top Secret Security Clearance OR Secret Clearance OR the ability to obtain a clearance
  • US Citizenship required
  • Must be willing to work various shifts in a 24x7 environment
  • Strong knowledge of networking
  • Strong knowledge of common network protocol
  • Strong knowledge of information security principles
  • Strong problem solving and troubleshooting skills
  • Excellent verbal and written communication skills
  • Excellent customer service skills
  • Possess DoD approved baseline certifications for IAT Level II and CSSP Analyst, or obtain within the first six months of employment

Desired Qualifications:

  • One or more years’ previous experience in network security monitoring is highly desired
  • Experience with network and host-based IDS/IPS
  • Experience with SIEM technologies
  • Experience with Anti-Malware or EDR technologies
  • Experience with SOAR solutions
  • Experience with advanced query, regular expression, scripting, or programming languages
  • The following security certifications are highly desired: GSEC, GCIA, GCIH, Pentest+, CHFI, OSCP.

Criterion Systems is committed to hiring and retaining a diverse workforce. We are proud to be an Equal Opportunity/Affirmative Action Employer, making decisions without regard to race, color, religion, creed, sex, sexual orientation, gender identity, marital status, national origin, age, veteran status, disability, or any other protected class. For our complete EEO/AA and Pay Transparency statement, please visit https://criterion-sys.com/careers.



Criterion offers comprehensive health benefits including medical, dental, vision, life and disability insurance. Most of our plans are available at no cost for employee only coverage.

Time Off

Employees begin accruing PTO at 15 days per year and acquire more based on seniority. In addition to PTO, Criterion provides 10 holidays and bereavement, military, jury duty, and family medical leave.


  • Roth and Traditional 401(k) Plans with company matching contributions
  • Health Care and Dependent Care Flexible Spending Accounts
  • Health Savings Accounts
  • Commuter Benefits


All employees are eligible to use up to $3,000 annually for approved professional development, including trainings, memberships, seminars, and degree programs.

Employee Testimonials

Pets of Criterion

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Equal Employment Opportunity and Affirmative Action Employer

Criterion Systems, Inc. is committed to equal employment opportunity and non-discrimination at all levels of our organization. We believe in treating all applicants and employees fairly and make decisions without regard to an individual’s protected status: race/ethnicity, color, national origin, ancestry, sex/gender, gender identity/expression, sexual orientation, marital/parental status, pregnancy/childbirth or related conditions, religion, creed, age, disability, genetic information, veteran status, or any other protected status.

Know Your Rights

Applicants have rights under Federal Employment Laws: Family and Medical Leave Act | Equal Employment Opportunity | Employee Polygraph Protection Act. Criterion participates in E-Verify. Review Right to Work information.

Need an Accommodation?

Criterion is committed to Equal Employment Opportunity and providing reasonable accommodations to applicants with physical and/or mental disabilities. If you are interested in applying for a position with Criterion and need special assistance or an accommodation to apply, please send an email with your request to recruiting@criterion-sys.com or call us at 703-942-5800. Determination on requests for reasonable accommodation are made on a case-by-case basis.