principal windows systems administrator Jobs in denver, co

1 - 20 of 203 Jobs

Systems AdministratorJob Title - Systems Administrator

TEKsystems c/o Allegis GroupCompany Name - TEKsystems c/o Allegis Group

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Aurora, Colorado, USA

Full-time

**Requires a Security Clearance (Please do not apply if you don't have a clearance.)** Top Skills' Details 1. 5+ years of experience with Red Hat Enterprise Linux (RHEL) server administration in an SCI classified environment 2. VMware and ESXi (6.x or higher) configuration and management experience 3. Group Policies (GPOs) experience; Active Directory management experience 4. Active Security Clearance: TS with SCI and full scope Poly 5. Must have a DOD 8570 IAT Level 2 baseline certification (ex

Systems Administrator (Windows / Linux) / Hybrid: Highlands Ranch, COJob Title - Systems Administrator (Windows / Linux) / Hybrid: Highlands Ranch, CO

Lockheed Martin CorporationCompany Name - Lockheed Martin Corporation

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Remote or Highlands Ranch, Colorado, USA

Full-time

Job Description Lockheed Martin's Enterprise Business & Digital Transformation (EBDT) organization 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 70 countries.

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

Principal Linux System AdministratorJob Title - Principal Linux System Administrator

RaytheonCompany Name - Raytheon

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Aurora, Colorado, USA

Full-time

Date Posted: 2025-07-07 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 Principal Linux System Administrator - Aurora, CO, must have an active TS/SCI CI Poly clea

Hybrid Systems Engineer, Sr (Windows / Linux) / Onsite: COJob Title - Hybrid Systems Engineer, Sr (Windows / Linux) / Onsite: CO

Lockheed Martin CorporationCompany Name - Lockheed Martin Corporation

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Remote or 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 employees work with our partners around the world to bring the latest technology 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 70 countries. This Enterprise Operations (EO) position supports the Lockheed Marti

DevOps Engineer/Systems AdministratorJob Title - DevOps Engineer/Systems Administrator

SNI TechnologyCompany Name - SNI Technology

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Centennial, Colorado, USA

Contract

Job Details SNI Technology's client is actively seeking to hire an IT DevOps Engineer for an exciting 3-month, contract-to-hire opportunity located in Centennial, CO! Please note this is a hybrid work environment requiring 3 days onsite per week (2 days remote/work from home). Summary We are seeking a mid-level IT professional for a hybrid role combining responsibilities in Systems Administration and Data Warehouse/Python development. This position supports core IT infrastructure, including Li

Senior Systems Administrator - TS/SCI with PolyJob Title - Senior Systems Administrator - TS/SCI with Poly

LeidosCompany Name - Leidos

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Aurora, Colorado, USA

Full-time

Leidos is seeking a highly skilled Senior Systems Administrator to support mission-critical operations across various laboratory environments. This role focuses on acquiring, configuring, and maintaining computer servers, operating systems, networks, and network file systems to address complex mission-specific challenges. The Senior Systems Administrator will work in dynamic lab settings, providing technical expertise, troubleshooting, and support to ensure reliable and secure IT infrastructure

Senior Systems Administrator (Linux/Windows)Job Title - Senior Systems Administrator (Linux/Windows)

GovCIOCompany Name - GovCIO

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Remote

Full-time

Overview GovCIO is hiring for a Senior Systems Administrator (Linux and Windows) to provide on-going support for the administration of the core system applications and perform operational tasks such as monitoring system resources and perform routine maintenance tasks in support of 24x7 life cycle applications to include on-call support. Work location is in Washington, DC and will be a hybrid remote with periodic onsite customer work activities. Must be willing to work nights, have an active Sec

Systems Administrator - Linux/WindowsJob Title - Systems Administrator - Linux/Windows

GovCIOCompany Name - GovCIO

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Remote

Full-time

Overview Provide on-going support for the administration of the core system applications and perform operational tasks such as monitoring system resources and perform routine maintenance tasks in support of 24x7 life cycle applications to include on-call support. Work location is hybrid with periodic customer site work activities. Must be willing to work nights, have a Security+ certification, and an active Top Secret clearance. Responsibilities Position Description: In this role you will: Pr

Systems Administrator - Linux/WindowsJob Title - Systems Administrator - Linux/Windows

GovCIOCompany Name - GovCIO

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Remote

Full-time

Network Engineer / Systems Administrator (SA)Job Title - Network Engineer / Systems Administrator (SA)

Cymertek CorporationCompany Name - Cymertek Corporation

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Aurora, Colorado, USA

Full-time

Network Engineer / Systems Administrator (SA) LOCATION Aurora, CO 80014 CLEARANCE TS/SCI Full Poly (Please note this position requires full U.S. Citizenship) KEY SUMMARY We are seeking a highly skilled and proactive **Network Engineer / Systems Administrator (SA)** to join our team and play a pivotal role in maintaining and enhancing our IT infrastructure. In this role, you will be responsible for designing, implementing, and managing network systems, as well as ensuring the reliability, secur

Systems AdministratorJob Title - Systems Administrator

Zachary Piper Solutions, LLCCompany Name - Zachary Piper Solutions, LLC

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Remote

Full-time

Piper Companies is seeking a Systems Administrator for an established healthcare organization. This is a 6-month contract and is REMOTE (based in US, must work EST). Responsibilities of the Systems Administrator: Support the remediation of Windows Server 2012 environments, including upgrade planning and execution to Azure. Maintain and administer enterprise-level Windows and Linux systems in a hybrid on-prem/cloud environment. Collaborate with vendors to manage third-party applications and navi

Systems AdministratorJob Title - Systems Administrator

Zachary Piper Solutions, LLCCompany Name - Zachary Piper Solutions, LLC

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Remote

Full-time

Piper Companies is seeking a Systems Administrator for an established healthcare organization. This is a 6-month contract and is REMOTE (based in US, must work EST). Responsibilities Support the remediation of Windows Server 2012 environments, including upgrade planning and execution to Azure. Maintain and administer enterprise-level Windows and Linux systems in a hybrid on-prem/cloud environment. Collaborate with vendors to manage third-party applications and navigate upgrade or decommission sc

G2 SharePoint Systems Administrator | Active Top Secret clearanceJob Title - G2 SharePoint Systems Administrator | Active Top Secret clearance

General DynamicsCompany Name - General Dynamics

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Remote

Full-time

Type of Requisition: Pipeline Clearance Level Must Currently Possess: Top Secret Clearance Level Must Be Able to Obtain: Top Secret Public Trust/Other Required: None Job Family: Systems Engineering Job Qualifications: Skills: Microsoft SharePoint Administration, SharePoint Management, System Administration Certifications: None Experience: 6 + years of related experience ship Required: Yes Job Description: Transform technology into opportunity as a SharePoint / Systems Administrator with

G2 Senior Systems Administrator | Active Top Secret clearanceJob Title - G2 Senior Systems Administrator | Active Top Secret clearance

General DynamicsCompany Name - General Dynamics

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Remote

Full-time

Type of Requisition: Pipeline Clearance Level Must Currently Possess: Top Secret Clearance Level Must Be Able to Obtain: Top Secret Public Trust/Other Required: None Job Family: Systems Engineering Job Qualifications: Skills: Microsoft Windows Server, System Administration, Virtual Environments Certifications: None Experience: 6 + years of related experience ship Required: Yes Job Description: Transform technology into opportunity as a Senior Systems Administrator with GDIT. A career in

Systems Administrator IIJob Title - Systems Administrator II

Sierra Nevada CorporationCompany Name - Sierra Nevada Corporation

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Remote or Southern Pines, North Carolina, USA

Full-time

Do you have an eye for detail and a passion for developing innovation solutions? Join our team! As a Systems Administrator II, you will be using your skills and expertise to assist in the analysis, development, and configuration of our existing software and systems that address business requirements and processes. You'll be responsible for evaluating the interface between hardware and software, operational requirements, and characteristics of our systems, establishing and documenting system para

Systems Administrator I, IT InfrastructureJob Title - Systems Administrator I, IT Infrastructure

tax.comCompany Name - tax.com

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Remote or Braga, Braga, Portugal

Full-time

Why Ryan? Competitive Compensation and BenefitsHome Office StipendBusiness Connectivity Reimbursement (Phone/Internet)Gym Membership or Equipment ReimbursementLinkedIn Learning SubscriptionFlexible Work EnvironmentTuition Reimbursement After One Year of ServiceAccelerated Career PathAward-Winning Culture & Community Outreach The Systems Administrator I maintains and manages server computing and storage platforms, including, but not limited to, installation, configuration, preventive maintenanc

Systems Administrator 2Job Title - Systems Administrator 2

NightwingCompany Name - Nightwing

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Remote or Annapolis, Maryland, USA

Full-time

Nightwing provides technically advanced full-spectrum cyber, data operations, systems integration and intelligence mission support services to meet our customers' most demanding challenges. Our capabilities include cyber space operations, cyber defense and resiliency, vulnerability research, ubiquitous technical surveillance, data intelligence, lifecycle mission enablement, and software modernization. Nightwing brings disruptive technologies, agility, and competitive offerings to customers in th

Systems Administrator 3Job Title - Systems Administrator 3

NightwingCompany Name - Nightwing

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Remote or Annapolis, Maryland, USA

Full-time

Sr. Software Engineer-Automated Test Framework TS/SCI PolyJob Title - Sr. Software Engineer-Automated Test Framework TS/SCI Poly

LeidosCompany Name - Leidos

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Aurora, Colorado, USA

Full-time

Description Leidos has a new and exciting opportunity for an Automated Test Framework Software Engineer in our National Security Sector's (NSS) Cyber & Analytics Business Area (CABA). Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At Leidos, we offer competitive benefits, including Paid Time Off, 11 paid Holidays, 401K with a 6% c