System Administrator

Digital Consultants, LLC•Sierra Vista, AZ

5d•Onsite

About The Position

Leading with our people, Digital Consultants' mission is to deliver the highest level of professional solutions while being a trusted partner and advisor to our customers. With a culture of practicality, opportunity, and creativity we remain dedicated to being honest, trustworthy, respectful, and ethical in everything we do. We are a certified SBA 8(a) small, disadvantaged business that supports multiple IT customers within the Federal, civilian, and private sectors. Digital Consultants also offers our employees growth opportunities, competitive wages, and a full benefits package. Our founding principles, Fairness, and Common Sense make working here more than a job, it’s the Digital family. Digital Consultants is seeking a System Administrator who will oversee the lifecycle management and sustainment of complex systems and network infrastructure supporting mission-critical national defense activities. This role requires expertise in both Windows and Linux environments, strong cybersecurity skills (including STIGs and ACAS scans), and adaptability to fast-changing priorities.

Requirements

Top Secret/SCI clearance and pass a polygraph
Must hold an IAT Level II certification, such as CompTIA Security+, or equivalent certifications required by DoW 8140.01 (e.g., CCNA, CISSP, RHCS)
Master’s Degree, or a Bachelor's with at least 4 years’ relevant experience; or an Associate’s and at least 6 years of experience in system administration, network management of related technical fields.
One year of experience can be substituted by 15 semester hours completed towards a master’s degree.
The degree must be in a relevant technical curriculum, and experience must be related to the job duties
Expertise in managing Active Directory, Group Policy, and Windows Server environments.
Strong knowledge of Linux server administration and automation using configuration management tools.
Experience with virtualization platforms (Hyper-V, VMware) and web server management (Apache, Nginx, or IIS).
Proficiency in security administration, including encryption, vulnerability scanning, and compliance auditing.
Experience performing STIGs and ACAS scans to detect vulnerabilities and enforce security compliance.
Familiarity with network infrastructure management, including routers, switches, firewalls, and structured cabling.
Ability to adapt to a fast-paced environment with evolving priorities.
Commitment to maintaining security, compliance, and operational excellence.

Nice To Haves

Experience working in government or test lab environments.
Advanced scripting skills in Bash, Python, or PowerShell.
Strong communication, critical thinking, and analytical skills.
Exceptional interpersonal skills and the ability to handle stress and work well under pressure.

Responsibilities

Manages the configuration and operation of IT systems and applications including installation, maintenance, and troubleshooting.
Detects, diagnoses, and resolves server hardware/software issues.
Assist users with IT system access and usage.
Installs and upgrades software, applies patches, and ensures system integrity.
Performs backup and recovery, monitors system configurations, and optimizes resource utilization.
Develops policies to align systems with business requirements and defines system needs based on scalability, cost, and integration with existing platforms.
Manage and maintain Active Directory (AD), including Group Policy Objects (GPOs), user provisioning, and authentication protocols.
Administer Windows Server OS environments (e.g., Server 2019/2022), handling provisioning, patching, and lifecycle management.
Oversee Microsoft Exchange or Microsoft 365 environments, ensuring email routing and security.
Manage Windows-based File Share servers, implementing NTFS permissions and Distributed File System (DFS) topologies.
Maintain virtualization platforms (e.g., Hyper-V or VMware) hosting Windows environments.
Deploy, configure, and maintain Linux servers (e.g., Red Hat Enterprise Linux, Ubuntu, CentOS).
Write and maintain automation and configuration management scripts (Ansible, Puppet, Chef, Bash/Python).
Administer Web Servers (Apache, Nginx) and conduct performance tuning to ensure high availability.
Support database administrators and developers by maintaining the OS layer of Database Servers (e.g., PostgreSQL, MySQL).
Monitor system logs, resource utilization, and perform routine security hardening on all Linux endpoints.
Administer the Key Management Server (KMS) and Public Key Infrastructure (PKI), managing certificate lifecycles.
Conduct routine vulnerability scans, patch management compliance checks, and security audits across systems.
Perform Security Technical Implementation Guides (STIGs) and Assured Compliance Assessment Solution (ACAS) using common identified tools scans to ensure security compliance and mitigate vulnerabilities.
Collaborate with stakeholders to implement remediation strategies and ensure security compliance.
Manage centralized backup and disaster recovery solutions, ensuring RPO and RTO targets are met.
Review system audit logs using centralized SIEM tools to detect anomalous activities and mitigate risks.
Ensure proper management of the organization's core servers, including: Web Server, File Share Server, Key Management Server, Database Server.
Provide end-to-end management of the JITC Test Lab network infrastructure, supporting testing and evaluation activities.
Plan and execute network modernization projects, maintaining security and capability of infrastructure components.
Monitor network health and security, perform preventative maintenance, and resolve user-reported incidents.
Deliver detailed incident and after-action reports following network outages or security incidents.