Security+ Jobs in Denver, CO

1 - 20 of 3,544 Jobs

COMSEC Network Designer LeadJob Title - COMSEC Network Designer Lead

CACI International, Inc.Company Name - CACI International, Inc.

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Denver, Colorado, USA

Full-time

COMSEC Network Designer Lead Job Category: Information Technology Time Type: Full time Minimum Clearance Required to Start: TS/SCI with Polygraph Employee Type: Regular Percentage of Travel Required: Up to 10% Type of Travel: Local Anticipated Posting End: 1/26/2026 The Opportunity: Team CACI has an exciting and challenging opportunity available for a COMSEC (communications security) Network Designer Lead supporting an Intelligence Community customer's wide-area (WAN), campus-area (CAN),

Principal Cloud Software EngineerJob Title - Principal Cloud Software Engineer

ManTechCompany Name - ManTech

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Denver, Colorado, USA

Full-time

Mantech seeks a motivated and customer-focused Principal Cloud Software Engineer to join our team in Denver, CO or Chantilly, VA. In this role, you will design, develop, and support cloud-based backend applications, ensuring secure and scalable solutions for mission-critical systems. Responsibilities include but are not limited to: Design, develop, and maintain production backend applications for the ServiceNow platform using Java Deploy and manage services in cloud environments, with an emph

W2 role-System Administrator - M365 Architect Westminster, CO (Hybrid)Job Title - W2 role-System Administrator - M365 Architect Westminster, CO (Hybrid)

Stellent IT LLCCompany Name - Stellent IT LLC

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Westminster, Colorado, USA

Contract, Third Party

W2 role- System Administrator - M365 Architect Location: Westminster, CO (Hybrid) Mode of Interview: Virtual Job Description: Our client is currently seeking a System Administrator - M365 Architect JOB DESCRIPTION We are looking for someone to help configure our M365 GCC-High tenant for end point security and external collaboration. Required Skills: Expert in securing an M365 tenant, specializing in external collaboration Expert in Conditional Access Policies and how they affect BYOD, Share

Principal Cloud Software EngineerJob Title - Principal Cloud Software Engineer

ManTechCompany Name - ManTech

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Denver, Colorado, USA

Full-time

Mantech seeks a motivated and customer-focused Principal Cloud Software Engineer to join our team in Denver, CO or Chantilly, VA. In this role, you will design, develop, and support cloud-based backend applications, ensuring secure and scalable solutions for mission-critical systems. Responsibilities include but are not limited to: Design, develop, and maintain production backend applications for the ServiceNow platform using JavaDeploy and manage services in cloud environments, with an emphasi

Sr. Principal Linux System AdministratorJob Title - Sr. Principal Linux System Administrator

RaytheonCompany Name - Raytheon

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Aurora, Colorado, USA

Full-time

Date Posted: 2025-07-01 Country: United States of America Location: CO108: 16201 East Centretech Parkway 16201 East Centretech Parkway Building S78, Aurora, CO, 80011 USA Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: Active and transferable U.S. government issued security clearance is required prior to start date.Security Clearance: TS/SCI with Polygraph Sr. Principal Linux System Administrator - Aurora, CO, must have an active TS/SCI CI Poly

Voice Systems/Hardware Engineer - TS/SCI with PolyJob Title - Voice Systems/Hardware Engineer - TS/SCI with Poly

LeidosCompany Name - Leidos

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Aurora, Colorado, USA

Full-time

Job DescriptionDescription The National Solutions Group at Leidos has an opening for a Voice Systems/Hardware Engineer to support a client s requirements in a challenging and dynamic setting located at Schriever SFB. The successful candidate will be required to execute, refine, and supervise the processes and procedures of Voice System/Hardware Engineering operations in a purpose-built enterprise environment throughout the operational lifecycle of customer directed mission applications. The VS/

Voice Systems/Hardware Engineer - TS/SCI with PolyJob Title - Voice Systems/Hardware Engineer - TS/SCI with Poly

LeidosCompany Name - Leidos

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Denver, Colorado, USA

Full-time

Entry Level ATLO Electrical System Integration/Test EngineerJob Title - Entry Level ATLO Electrical System Integration/Test Engineer

Lockheed Martin CorporationCompany Name - Lockheed Martin Corporation

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Littleton, Colorado, USA

Full-time

Job Description Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more - we can innovate, invest, inspire and integrate our capabilities to transform the future. At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We're creating future-ready soluti

Information Systems Security ManagerJob Title - Information Systems Security Manager

LeidosCompany Name - Leidos

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Greenwood Village, Colorado, USA

Full-time

Leidos' Office of the Cyber Information Security Officer within the Digital Modernization sector has an exciting opportunity for a seasoned Cybersecurity Information System Security Manager (ISSM) located in Greenwood Village, Colorado. You will ensure IT systems remain compliant to government regulations, frameworks, and standards pertaining to SP NIST 800-53A. Qualified candidates will have knowledge, experience and demonstrated ability to perform tasks related to assessing, securing, and mon

Storage EngineerJob Title - Storage Engineer

LeidosCompany Name - Leidos

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Aurora, Colorado, USA

Full-time

Description Looking for an opportunity to make an impact? At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers' success. We empower our teams, contribute to our communities, and operate sustainably. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community. The Leidos National Security Sector (NSS) combines technology-enabled services and mission software capabi

(USA) Software Engineer IIJob Title - (USA) Software Engineer II

Walmart Inc.Company Name - Walmart Inc.

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Denver, Colorado, USA

Full-time

Position Summary Join the dynamic and innovative Walmart/VIZIO Team as a Software Engineer II! This is a fantastic opportunity to work on cutting-edge software solutions within the ad-tech ecosystem. You'll be part of a talented team dedicated to building and maintaining robust applications, leveraging a diverse tech stack including Java Spring Boot and Laravel PHP. What you'll do About the Team: The Walmart/VIZIO Team is committed to delivering high-quality software solutions. We operate in a

(USA) Principal, Systems and Infrastructure Engineer, Information SecurityJob Title - (USA) Principal, Systems and Infrastructure Engineer, Information Security

Walmart Inc.Company Name - Walmart Inc.

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Remote or Denver, Colorado, USA

Full-time

Position Summary Are you ready to lead the charge in transforming our infrastructure? As a Principal, Systems and Infrastructure Engineer at Walmart/VIZIO, you will play a pivotal role in designing, building, and maintaining scalable and secure infrastructure. This is a unique opportunity to drive the migration and modernization of critical applications and systems, ensuring seamless transitions and minimal downtime. What you'll do About the Team: The Walmart/VIZIO Team is dedicated to levera

Information Systems Analyst, Space SecurityJob Title - Information Systems Analyst, Space Security

Lockheed Martin CorporationCompany Name - Lockheed Martin Corporation

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Remote or Littleton, Colorado, USA

Full-time

Job Description Active Secret clearance with ability to obtain Top Secret clearance. Lockheed Martin Space (LMS) is seeking an experienced and highly skilled Information Systems Analyst to join our Operations, Compliance, Education and Training (OCET) Automation Integration & Tools team. As a team member, you will play a critical role in partnering with the security team to support application development and maintenance of multiple tools utilized across the Enterprise. **Key Responsibilities

Military Fellowship Program: Systems Security EngineerJob Title - Military Fellowship Program: Systems Security Engineer

Sierra Nevada CorporationCompany Name - Sierra Nevada Corporation

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Lone Tree, Colorado, USA

Full-time

SNC's Military Fellowship Program partners with programs such as SkillBridge and Hiring Our Heroes to provide fellowship opportunities to service members transitioning to the civilian workforce. These fellowships include up to six months of on-the-job industry training for eligible service members. During this time, participants gain valuable work experience in the civilian sector and build professional networks as they prepare for their transition to full-time civilian work. NOTE: You must be

Senior Network EngineerJob Title - Senior Network Engineer

Lockheed Martin CorporationCompany Name - Lockheed Martin Corporation

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Littleton, Colorado, USA

Full-time

Job Description As we enter a new era of Strategic Weapon Systems, Lockheed Martin is a pioneer, partner, innovator and builder. Our amazing men and women are on a mission to make a difference in the world and every single day we use our unique skills, talents and experiences to design and build solutions to some of the world's hardest engineering problems. Do you want to be part of a culture that inspires employees to envision the impossible, perform with excellence and build incredible produc

Cyber Risk Defense Consultant - Splunk AdministratorJob Title - Cyber Risk Defense Consultant - Splunk Administrator

Kaiser PermanenteCompany Name - Kaiser Permanente

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Greenwood Village, Colorado, USA

Full-time

Job Summary: The Splunk Administrator is responsible for maintaining and administering servers and infrastructure supporting Kaiser Permanente's Security Information & Event Management platform as well as perform Splunk application administration activities including administration of a Splunk Cloud environment. The Splunk Administrator will augment an existing team and will perform system administration tasks on a very large and complex Red Hat environment and enterprise clustered Splunk envir

Full Stack Systems Engineer IT / TS/SCI Poly / Onsite: Littleton, COJob Title - Full Stack Systems Engineer IT / TS/SCI Poly / Onsite: Littleton, CO

Lockheed Martin CorporationCompany Name - Lockheed Martin Corporation

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Littleton, Colorado, USA

Full-time

Job Description Our employees are the core of everything we do, and they are helping the future arrive. As a leading technology innovation company, our team of over 100,000 people works with partners around the world to bring proven performance to our customers' toughest challenges. Headquartered in Bethesda, MD, Lockheed Martin has employees based in all 50 states and more than 570 facilities that span more than 70 countries. This Lockheed Martin Enterprise Operations (EO) position will suppor

IDAM EngineerJob Title - IDAM Engineer

LeidosCompany Name - Leidos

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Aurora, Colorado, USA

Full-time

Release Train EngineerJob Title - Release Train Engineer

Parsons Services CompanyCompany Name - Parsons Services Company

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Boulder, Colorado, USA

Full-time

In a world of possibilities, pursue one with endless opportunities. Imagine Next! When it comes to what you want in your career, if you can imagine it, you can do it at Parsons. Imagine a career working with exceptional people sharing a common quest. Imagine a workplace where you can be yourself. Where you can thrive. Where you can find your next, right now. We've got what you're looking for. Job Description: Parsons is looking for a talented Release Train Engineer (RTE) to join our growing t

Architecture Engineer (NE II) (Government)Job Title - Architecture Engineer (NE II) (Government)

AT&T Inc.Company Name - AT&T Inc.

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Centennial, Colorado, USA

Full-time

Job Description: AT&T Global Public Sector is a trusted provider of secure, IP enabled, cloud-based, network solutions and professional services to the Federal Government. We are dedicated to recruiting, developing, and empowering a diverse, high-performing workforce that is passionate about what they do, committed to our shared values, and dedicated to our customers' mission. Our National Security Team supports the intelligence community by providing, operating, and assuring critical voice, v