1

Cyber Security Engineer Iii Jobs (NOW HIRING)

Job Title: Cyber Security Engineer Location: St. Louis, MO Work Model: Onsite Position Type: 6 ... Preferred Qualifications IAT Level III certification. DoD 8140.01 and DoD 8570.01-M IAT Level III ...

Job Title: Cyber Security Engineer Location: St. Louis, MO Work Model: Onsite Position Type: 6 ... Preferred Qualifications IAT Level III certification. DoD 8140.01 and DoD 8570.01-M IAT Level III ...

Job Title: Cyber Security Engineer Location: St. Louis, MO Work Model: Onsite Position Type: 6 ... Preferred Qualifications IAT Level III certification. DoD 8140.01 and DoD 8570.01-M IAT Level III ...

Job Title: Cyber Security Engineer Location: St. Louis, MO Work Model: Onsite Position Type: 6 ... Preferred Qualifications IAT Level III certification. DoD 8140.01 and DoD 8570.01-M IAT Level III ...

Job Title: Cyber Security Engineer Location: St. Louis, MO Work Model: Onsite Position Type: 6 ... Preferred Qualifications IAT Level III certification. DoD 8140.01 and DoD 8570.01-M IAT Level III ...

Job Title: Cyber Security Engineer Location: St. Louis, MO Work Model: Onsite Position Type: 6 ... Preferred Qualifications IAT Level III certification. DoD 8140.01 and DoD 8570.01-M IAT Level III ...

Job Title: Cyber Security Engineer Location: St. Louis, MO Work Model: Onsite Position Type: 6 ... Preferred Qualifications IAT Level III certification. DoD 8140.01 and DoD 8570.01-M IAT Level III ...

Job Title: Cyber Security Engineer Location: St. Louis, MO Work Model: Onsite Position Type: 6 ... Preferred Qualifications IAT Level III certification. DoD 8140.01 and DoD 8570.01-M IAT Level III ...

Job Title: Cyber Security Engineer Location: St. Louis, MO Work Model: Onsite Position Type: 6 ... Preferred Qualifications IAT Level III certification. DoD 8140.01 and DoD 8570.01-M IAT Level III ...

Job Title: Cyber Security Engineer Location: St. Louis, MO Work Model: Onsite Position Type: 6 ... Preferred Qualifications IAT Level III certification. DoD 8140.01 and DoD 8570.01-M IAT Level III ...

Job Title: Cyber Security Engineer Location: St. Louis, MO Work Model: Onsite Position Type: 6 ... Preferred Qualifications IAT Level III certification. DoD 8140.01 and DoD 8570.01-M IAT Level III ...

Job Title: Cyber Security Engineer Location: St. Louis, MO Work Model: Onsite Position Type: 6 ... Preferred Qualifications IAT Level III certification. DoD 8140.01 and DoD 8570.01-M IAT Level III ...

The Cyber Security Engineer III plays a critical role in safeguarding the university's information infrastructure by administering, monitoring, and optimizing security systems across on-premises and ...

Initiate actions to conduct cybersecurity engineering research and analysis and provides recommendations for the implementation of security mechanisms * Initiate actions to apply advanced concepts of ...

Showing results 41-60

Cyber Security Engineer Iii information

See salary details

$40.5K

$122.9K

$180K

How much do cyber security engineer iii jobs pay per year?

As of Sep 8, 2026, the average yearly pay for cyber security engineer iii in the United States is $122,890.00, according to ZipRecruiter salary data. Most workers in this role earn between $102,000.00 and $142,000.00 per year, depending on experience, location, and employer.

What does a Cyber Security Engineer III do?

A Cyber Security Engineer III is a senior-level professional responsible for designing, implementing, and maintaining advanced security systems to protect an organization's digital assets. They analyze security risks, develop policies, and respond to security incidents. In addition, they may mentor junior staff, conduct vulnerability assessments, and recommend improvements to enhance overall cyber defense. Their role often includes collaborating with IT teams to ensure compliance with security standards and best practices.

What are the key skills and qualifications needed to thrive as a Cyber Security Engineer III, and why are they important?

To thrive as a Cyber Security Engineer III, you need advanced knowledge of network security, threat analysis, and risk management, typically supported by a bachelor’s degree in computer science or a related field and several years of experience. Familiarity with security tools such as SIEM systems, firewalls, vulnerability scanners, and certifications like CISSP or CEH are commonly required. Strong analytical thinking, problem-solving, and effective communication help you respond to incidents and collaborate with cross-functional teams. These skills are critical to proactively safeguarding organizational assets against evolving cyber threats and ensuring compliance with security standards.

What are some common challenges faced by Cyber Security Engineer III professionals in coordinating with cross-functional teams?

Cyber Security Engineer III professionals often work closely with IT, development, and business teams to implement security measures. A common challenge is ensuring clear communication of technical risks and best practices to non-security stakeholders, which requires translating complex security concepts into actionable advice. Additionally, balancing security priorities with business objectives and project timelines can sometimes lead to difficult compromises. Strong collaboration and negotiation skills are essential for effectively advocating for security while supporting organizational goals.

What is the difference between Cyber Security Engineer Iii vs Cyber Security Engineer Ii?

AspectCyber Security Engineer IiiCyber Security Engineer Ii
Required CertificationsCompTIA Security+, CISSP (preferred)CompTIA Security+, CEH (preferred)
Work EnvironmentTeam-based, security operations centers, enterprise networksSupport roles, assisting senior engineers, network security
Employer & Industry UsageTech companies, finance, government agenciesSimilar industries, often entry to mid-level roles
Common Search & ComparisonYesYes

The main difference between Cyber Security Engineer Iii and Cyber Security Engineer Ii lies in experience level, certifications, and responsibilities. The Iii typically has more advanced skills, handles complex security tasks, and may lead projects, whereas the Ii supports security operations and assists senior staff. Both roles are vital in maintaining organizational security but differ in scope and expertise.

More about Cyber Security Engineer Iii jobs

What states have the most Cyber Security Engineer Iii jobs?

States with the most job openings for Cyber Security Engineer Iii jobs include:

Infographic showing various Cyber Security Engineer Iii job openings in the United States as of August 2026, with employment types broken down into 100% Full Time. Highlights an 75% In-person, and 25% Remote job distribution, with an average salary of $122,890 per year, or $59.1 per hour.

Cyber Security Engineer III

System One

Saint Louis, MO • On-site

Contractor

Medical, Dental, Vision, Life, Retirement

Re-posted 5 days ago


Job description

Job Title: Cyber Security Engineer Location: St. Louis, MO Work Model: Onsite Position Type: 6 Month Contract to Hire Clearance Requirement: Active TS/SCI required and ability to obtain poly

Job Summary

We are seeking a Cyber Security Engineer to support a mission critical NGA cybersecurity program in St. Louis, MO. This role will provide cyber threat intelligence, advanced cybersecurity analytics, security operations support, and incident response coordination across government systems and networks.

The Cyber Security Engineer will collect, analyze, and distribute threat intelligence from government sources, commercial feeds, open source reporting, and partner organizations to improve situational awareness of the cyber threat environment. This role will also support cybersecurity analytics, reporting, detection tuning, operational recommendations, and security monitoring activities for customer systems and networks.

This is a strong fit for someone with hands on cyber operations experience across HBSS, firewalls, IDS, IPS, VPNs, network security tools, threat intelligence, incident analysis, and cybersecurity reporting.

Key Responsibilities

Provide cyber threat intelligence support, including the collection, fusion, analysis, creation, and distribution of threat intelligence from government entities, commercial feeds, open sources, and partner organizations.

Develop and disseminate threat reports, tippers, and situational awareness products to internal and external stakeholders based on events, alerts, and incidents affecting customer systems and networks.

Perform advanced cybersecurity analytics by aggregating and analyzing security data, products, and information to identify trends, patterns, anomalous activity, and potential threats.

Provide operational recommendations, visualizations, tuning requests, and custom signature creation to the CSOC and other stakeholders.

Implement and monitor security measures for communication systems and networks while ensuring systems and personnel follow established security standards and government requirements.

Support network security activities involving HBSS, firewalls, Intrusion Detection Systems, Intrusion Prevention Systems, VPNs, and other point of presence security tools.

Conduct performance analysis of information systems security incidents and support security incident response activities.

Support Network Intrusion Detection and Forensics activities.

Assist with Continuity of Operations and Disaster Recovery planning.

Support certification activities for information systems and networks.

Provide cybersecurity services during core 12x5 support hours and participate in on call support with a two hour response requirement during non core hours.

Support Public Key Infrastructure, Electronic Key Management System operations, and other information security duties as needed.

Develop new concepts, processes, and solutions to improve cybersecurity operations.

Analyze root causes, resolve technical issues, and provide guidance to junior technicians and specialists.

Work individually, participate on integrated teams, and potentially lead tasks, projects, or small teams.

Required Qualifications

Active TS/SCI clearance.

U.S. Citizenship.

Bachelor’s degree in a technical field such as Information Technology, Information Systems, Computer Science, Cybersecurity, or a related discipline.

Equivalent experience may be considered as follows:

High School diploma or GED with 10 years of relevant cybersecurity experience.

Associate degree with 8 years of relevant cybersecurity experience.

Bachelor’s degree with 6 or more years of relevant cybersecurity experience.

Experience working in cybersecurity operations with tools and technologies such as HBSS, firewalls, Intrusion Prevention Systems, Intrusion Detection Systems, VPNs, and related security operations platforms.

Experience supporting cybersecurity monitoring, analysis, threat intelligence, incident response, or security operations center environments.

Ability to analyze cybersecurity events, alerts, incidents, and threat reporting to identify risks and provide actionable recommendations.

Preferred Qualifications

IAT Level III certification.

DoD 8140.01 and DoD 8570.01-M IAT Level III certification.

CSSP Analyst certification.

Ability to obtain required DoD 8140 / 8570 certifications within 6 months of starting if not already held.

Master’s degree in a technical field.

TS/SCI with Polygraph.

Experience supporting NGA, DoD, intelligence community, or mission critical federal cybersecurity environments.

Experience creating cyber threat reports, tippers, custom signatures, tuning recommendations, or operational threat intelligence products.

System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.

System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.

#M1 #LI-CS1 Ref: #856-Baltimore-S1


System One logo

About System One

Sourced by ZipRecruiter

System One helps employers get work done more efficiently and economically without compromising quality. Over our 35+ year history, we've helped connect thousands of talented people with innovative companies. The excitement of a perfect fit motivates us every single day.

Industry

Business consulting services and recruiting and staffing services

Company size

5,001 - 10,000 Employees

Headquarters location

Pittsburgh, PA, US