Systems Engineer (Secret Clearance)

Command Holdings
O Fallon, IL

Job Description

Job Description

CeLeen, an operating group of Command Holdings, is seeking a Systems Engineer for a contract within the Department of Defense (DOD) at USTRANSCOM in support of Managed Information Technology Services (MITS) Enterprise Support.

The successful candidate will perform a variety of systems engineering tasks and activities that are broad in nature and are concerned with major systems design, integration, and implementation, including personnel, hardware, software, budgetary, and support facilities and/or equipment. The systems engineer will also provide quality assurance review and the evaluation of new and existing software products.

Expected Salary range: $72,000 - $92,000

Specific responsibilities include but are not limited to:

  • Managing and monitoring all installed systems and infrastructure.
  • Installing, configuring, testing, and maintaining operating systems, application software and system management tools.
  • Proactively ensure the highest levels of systems and infrastructure availability.
  • Monitor and test application performance for potential bottlenecks, identify possible solutions, and work with developers to implement those fixes.
  • Maintain security, backup, and redundancy strategies.
  • Participate in the design of information and operational support systems.
  • Provide 2nd and 3rd level support.
  • Liaise with vendors and other IT personnel for problem resolution.
  • System vulnerability remediation and reporting.
  • System configuration and compliance.
  • Proven working experience in installing, configuring, and troubleshooting UNIX/Linux/RedHat based environments.

Work Environment:

  • Moderate noise (i.e. business office with computers, phone and printers) and /or occasional Loud noise (airfield, large equipment).
  • Ability to sit at a computer terminal for an extended period of time.

Physical Demands:

  • While performing the responsibilities of the job, the employee is required to sit, stand, talk, and hear.
  • Employee is often required to sit and use their hands and fingers to operate a computer.
  • Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

Travel:

  • 0-10% / Minimal travel.

CeLeen, an operating firm of Command Holdings, a Pequot company, is a tribally-owned firm providing management consulting services to U.S. government agencies.

Pursuant to PL 93-638, as amended, preference will be given to qualified Native Americans and spouses in all phases of employment.

At CeLeen, our employees are the embodiment of our success as a firm. Our team is comprised of a tenacious group of professionals located across the globe. It includes military veterans and spouses of active duty troops, former federal employees, policy experts, academics, attorneys, and technical and business experts, all of whom share a strong work ethic and the skills to succeed in both collaborative and independent environments. CeLeen is invested in the long-term success of both our clients and colleagues for the right reasons. Our dedication to putting good government into practice is underpinned by a merit-based culture that measures success by productivity and credibility.

CeLeen will provide reasonable accommodations to applicants who are unable to utilize our online application system due to a disability. Please send your request to the Human Resources Team.

CeLeen is committed to equal employment opportunity based on merit. We recruit, employ, train, compensate, and promote without regard to race, religion, color, national origin, age, sex, disability, protected veteran status, or any other basis protected by applicable federal, state, or local law, and in accordance with EO 14173 and Federal Employment Laws: Equal Employment Opportunity and Employee Polygraph Protection Act.

CeLeen's Affirmative Action Program is available to any employee or applicant for employment for inspection upon request, to the extent required by federal regulations. The Affirmative Action Program can be accessed during normal business hours by making an appointment with the Human Resources Team.

Requirements

Basic Qualifications

  • A minimum of four (4) years of relevant experience.
  • Current, active Secret security clearance.
  • Must be a US Citizen.
  • Must have one of the following IAT Level II certifications: Security+ , CYSA+, CCNA Security, GICSP, GSEC, CND, SSCP, CEH, CISA, etc.
  • Experience with Linux.
  • Must have experience in installing, configuring, and troubleshooting UNIX/Linux/RedHat based environments.
  • Experience in systems design, installation, implementation, and support in an Microsoft Windows Server 2012/2016 environment.
  • Experience with Azure or AWS Cloud Environments.
  • Experience with production environments.
  • Working knowledge of authentication functions and protocols such as LDAP, Kerberos, and Active Directory.
  • Conceptual knowledge of Storage systems (SAN/NAS).
  • Outstanding communication skills, influencing abilities, and client focus.
  • Professional proficiency in English is required.
  • Demonstrated proficiency in using all Microsoft Office applications.
  • Ability to access federal facilities in compliance with Real ID. More information about Real ID can be found here: -id/about-real-id and at - screening/identification.
  • Applicants must be currently authorized to work in the United States on a full-time basis. CeLeen will not sponsor applicants for work visas for this position.

Preferred Qualifications

  • Bachelor's Degree.
  • 8 years of systems engineering experience.
  • One or more of the following IT certifications: MCP, CompTIA A+ / Network+, AWS, Azure.
  • ITIL V4 Foundations certification.

Benefits

CeLeen offers a competitive benefits plan including:

  • Health, Dental, and Vision Insurance
  • Flexible Spending Accounts
  • Life and Disability Insurance
  • 401(k)
  • Paid Time Off
  • Paid Holidays
  • Employee Assistance Program
  • Pet Insurance

Eligibility requirements apply.

Posted 2025-07-27

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