System Security Administrator - Sr Principal (w/ active TS)
Location: Arlington, Virginia, United States
Company: Critical Solutions
Job Type: Full-time
Posted: Aug 30, 2025
Application deadline: Nov 7, 2025
Source: ZipRecruiter
System Security Administrator - Sr Principal (w/ active TS)
Location: Arlington, VA
Clearance: TS/SCI
Schedule: TBD
Full-time
JOB DESCRIPTION
Critical Solutions is seeking an experienced Systems Security Administrator to support our federal customer in Arlington, VA.
PRIMARY ROLES AND RESPONSIBILITIES:
- Perform domain migrations, both internal and external to the customer environment, to include Active Directory, file services, print services, DHCP, and other commodity IT services.
- Resolve a wide range of system issues including troubleshooting software and hardware, diagnosis of network issues, and addressing trouble tickets and service tasks across all tiered levels.
- Assist with achieving optimum performance and availability standards through implementing appropriate technical solutions.
- Complete the day-to-day tasks associated with system administration in the DES Compute Environment.
- Provide support for implementation, troubleshooting, and maintenance of IT systems.
- Provide on call 24/7 support to the current operations team when troubleshooting/resolving incidents with enterprise systems.
- Provide escalation support to the NOC/monitoring team when troubleshooting issues with enterprise systems.
- Manage IT system infrastructure and continuously update associated process and/or procedural documentation.
- Work within the DevSecOps methodology to plan and support implementation of new technologies.
- Prepare recommendations for resolutions to NetOps challenges based on monitoring results, tools analysis, and/or forensics.
- Work with other service teams to resolve enterprise incidents as part of the DES Operations Problem Solving Team.
- Work with the monitoring team to address issues that will impact system availability.
- Update systems by implementing and maintaining security controls.
BASIC QUALIFICATIONS:
- Must possess an active Top-Secret Clearance w/ SCI eligibility.
- Bachelor's degree in Computer Science, Information Technology, or related field and 12+ years of relevant experience
- UNIX, Windows, and/or Storage administration experience.
- Experience with trouble reporting and tracking systems such as BMC REMEDY and ServiceNow.
- Ability to lift/move/carry equipment when necessary (max forty pounds).
- Experience in managing, troubleshooting, and maintaining Windows Servers.
- Strong experience managing Windows Active Directory, virtual servers, VMware, and Azure including support of AD migration of accounts and objects.
- Experience with vulnerability scanning solutions.
- Familiarity with the DOD Information Assurance Vulnerability Management program.
- Familiarity with MECM, AZURE, Ansible, Antivirus and security deployment tools.
- Experience with on-call rotation schedule for incident respond and escalations.
- DOD 8570 IAT II Certification (Sec+ CE or equivalent).
- Expertise in troubleshooting Windows Operating Systems (Windows 10/11 and Server 2019), Microsoft Office 365, Active Directory, network issues, print logic, IIS, VMware, and Azure.
- Strong scripting and PowerShell skills.
- Experience building, configuring, and hardening Windows servers.
- Strong VMware experience.
- Experience using ServiceNow (or similar tool) to document incidents and service requests.
- Advanced experience with Active Directory management and administration.
ADDITIONAL INFORMATION:
This position is contingent on contract award.
Clearance Requirement: Possess an active DoD Top Secret Clearance. In addition, selected candidate must undergo background investigation (BI) and finger printing by the federal agency and successfully pass the preceding to qualify for the position. US CITIZENSHIP IS REQUIRED.
CRITICAL SOLUTIONS PAY AND BENEFITS:
Salary range $- $. The salary range for this position represent the typical salary range for this job level and this does not guarantee a specific salary. Compensation is based upon multiple factors such as responsibilities of the job, education, experience, knowledge, skills, certifications, and other requirements.
BENEFIT SNAPSHOT: 100% premium coverage for Medical, Dental, Vision, and Life Insurance, Supplemental Insurance, 401K matching, Flexible Time Off (PTO/Holidays), Higher Education/Training Reimbursement, and more.
Job Posted by ApplicantPro
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