Linux Administrator Jobs in Missouri (NOW HIRING)

Sr. Systems Administrator

St. Louis, MO

Are you ready to enhance your skills and build your career in a rapidly evolving business climate? Are you looking for a career where professional development is embedded in your employer's core culture? If so, Chenega Military, Intelligence & Operations Support (MIOS) could be the place for you! Join our team of professionals who support large-scale government operations by leveraging cutting-edge technology and take your career to the next level! 

Chenega Agile Real-Time Solutions (CARS) was created with the purpose of providing integrated enterprise IT support to Federal customers both CONUS and OCONUS. CARS employs Subject Matter Experts (SMEs) with decades of experience working in the Federal marketplace. 

We are seeking an experienced Senior Systems Administrator to lead the design, management, and optimization of our Windows-based systems and AWS cloud infrastructure. The ideal candidate will have deep expertise in Windows environments, cloud technologies, and cybersecurity, with a proven ability to architect and support secure, scalable enterprise systems. This role provides an opportunity to work with cutting-edge technologies, contributing to the high availability, performance, and security of our IT operations.

• Administer, maintain, and support the application with the customer enterprise.
• Perform installation, configuration, patching, upgrades, and lifecycle management of Windows and Linux servers.
• Monitor system health, performance, and availability using enterprise monitoring tools.
• Troubleshoot complex hardware, software, operating system, and application issues.
• Support deployment activities across development, test, staging, and production environments.
• Coordinate scheduled maintenance windows and execute system upgrades with minimal operational impact.
• Develop and maintain automation scripts using PowerShell, Bash, or Python to improve operational efficiency.
• Perform backup, recovery, and disaster recovery operations.
• Support accreditation activities and ensure compliance with customer, DoD, RMF, DISA STIG, and security requirements.
• Manage user accounts, permissions, and Active Directory integrations.
• Collaborate with security teams to remediate vulnerabilities and maintain compliance.
• Support incident response, root cause analysis, and corrective action implementation.
• Document system configurations, standard operating procedures, and technical documentation.
• Participate in on-call rotation and provide after-hour support when required.
• Interface directly with customers to address operational tasking and mission requirements.
• Other duties as assigned.

• Bachelor's degree in information technology, Computer Science, Engineering, OR related field, and 8+ years of prior relevant experience OR
• Master's with 6+ years of prior relevant experience.
• 8+ years of enterprise systems administration experience.
• Experience supporting mission-critical DoD or Intelligence Community environments.
• Strong administration experience with:
  • Microsoft Windows Server
  • VMware vSphere
  • DNS/DHCP
  • Group Policy
• Experience with scripting and automation using PowerShell, Bash, or Python.
• Must have a Security+ CE or higher DoD 8570/8140 certification
• Experience supporting customer mission systems.
• Experience supporting GEOINT applications.
• Experience with:
  • VMware vCenter
  • Git
  • ServiceNow
• Active TS/SCI clearance required
• Successfully pass background and drug screening

Knowledge, Skills, and Abilities:

• Ability to work independently and yet be effective within a team setting
• Must be capable of managing multiple efforts with time-related constraints in a fast-paced contracting environment
• Demonstrated ability to effectively communicate and collaborate with diverse internal and external stakeholder groups and individuals
• Friendly presence, helpful attitude, good interpersonal skills, and ability to work well with others.
• Excellent skills in Microsoft Word, Excel, and other Office applications
• Proficient with Microsoft Office Applications, and experience working in a home office setting as well as the ability to train end users on frequently asked technical issues.
• Ability to provide technical assistance and support over the phone; good phone skills, professional demeanor, and previous customer service experience strongly desired.
• Good problem-solving skills; ability to visualize a problem/situation and think abstractly to solve it
• Knowledge of RMF security controls and vulnerability remediation
• Strong administration experience with:
  • Red Hat Enterprise Linux (RHEL)
  • Active Directory
• Experience implementing and maintaining STIG compliance
• Experience with:
  • Ansible
  • SCCM/MECM
  • Splunk
  • Elastic Stack
• Red Hat Certified Systems Administrator (RHCSA)
• Microsoft Certified: Windows Server Hybrid Administrator Associate
• ITIL Foundation Certification
• Strong troubleshooting and analytical skills
• Ability to obtain CI Polygraph
• Ability to work Shift hours. Shifts will be identified upon hire
• Ability to work nights/weekends/holidays as required
• Ability to work independently and yet be effective within a team setting
• Must be capable of managing multiple efforts with time-related constraints in a fast-paced contracting environment
• Demonstrated ability to effectively communicate and collaborate with diverse internal and external stakeholder groups and individuals

How you'll grow 

At Chenega MIOS, our professional development plan focuses on helping our team members at every level of their careers to identify and use their strengths to do their best work every day. From entry-level employees to senior leaders, we believe there's always room to learn. 

We offer opportunities to help sharpen skills in addition to hands-on experience in the global, fast-changing business world. From on-the-job learning experiences to formal development programs, our professionals have a variety of opportunities to continue to grow throughout their careers. 

Benefits 

At Chenega MIOS, we know that great people make a great organization. We value our team members and offer them a broad range of benefits. 

Learn more about what working at Chenega MIOS can mean for you. 

Chenega MIOS's culture 

Our positive and supportive culture encourages our team members to do their best work every day. We celebrate individuals by recognizing their uniqueness and offering them the flexibility to make daily choices that can help them be healthy, centered, confident, and aware. We offer well-being programs and continuously look for new ways to maintain a culture where we excel and lead healthy, happy lives. 

Corporate citizenship 

Chenega MIOS is led by a purpose to make an impact that matters. This purpose defines who we are and extends to relationships with our clients, our team members, and our communities. We believe that business has the power to inspire and transform. We focus on education, giving, skill-based volunteerism, and leadership to help drive positive social impact in our communities. 

Learn more about Chenega's impact on the world. 

Chenega MIOS News- https://chenegamios.com/news/ 

Tips from your Talent Acquisition Team 

We want job seekers exploring opportunities at Chenega MIOS to feel prepared and confident. To help you with your research, we suggest you review the following links: 

Chenega MIOS web site - www.chenegamios.com 

Glassdoor - https://www.glassdoor.com/Overview/Working-at-Chenega-MIOS-EI_IE369514.11,23.htm 

LinkedIn - https://www.linkedin.com/company/1472684/ 

Facebook - https://www.facebook.com/chenegamios/ 

#Chenega Agile Real Time Solutions, LLC