Systems Administrator

Sierra Management and Technologies, Inc. (Sierra), provides unparalleled logistics and program management, cutting-edge software and IT system development, and innovative data science and analytics services to our Department of Defense clients as well as superior support to Government Contracting Facility Security Officers (FSO).

As a disadvantaged, minority-owned, small business, we are committed to exceeding expectations and fostering excellence within our workforce. Sierra has a proud history of hiring veterans and encourages those who have served in the armed forces to apply.

Sierra is an honored recipient of the following awards:

• HIRE Vets Medallion Award

• VETS Indexes Employer Award

About the Role:

Sierra Technologies is seeking an IT Systems Administrator to support daily operations across a hybrid IT environment. This role works closely with a senior system administrator to maintain infrastructure, execute security and compliance tasks, and provide reliable end-user support.

This position is ideal for someone who is technically strong, detail-oriented, and comfortable working independently on assigned tasks, while escalating complex issues and architecture decisions as needed.

This is an on-site position in Southern Maryland (St. Mary’s County), with the option to telework one day per week.

Key Responsibilities:

• Systems & Identity -Manage Active Directory and Azure AD user accounts, access provisioning, group policies, and SSO/conditional access support.

• Endpoint Management

  • Support 80+ systems and 100+ users with patching, vulnerability remediation, endpoint monitoring, hardware deployments, and remote/VPN connectivity.

• Microsoft 365

  • Administer Exchange Online, SharePoint, Teams, and OneDrive; handle licensing, service health monitoring, and assist with GCC High migration.

• Network & Security

  • Assist with firewall and network device management, monitor logs, support email filtering and endpoint security tools.

• Compliance Support

  • Help maintain CMMC Level 2, NIST SP 800-171, and DFARS documentation including asset inventories, network diagrams, and audit artifact collection.

• Help Desk

  • Resolve user tickets, troubleshoot hardware/software/access issues, and support onboarding and offboarding.

• Vendor & Asset

  • Assist with software licensing, asset tracking, and vendor coordination.

What Makes a Successful Candidate:

To perform this job successfully, an individual must be able to perform each essential duty satisfactorily. The requirements listed below are representative of the knowledge, skill, and ability required. Reasonable accommodations may be made to enable individuals with disabilities to perform essential functions.

Must have:

• 3+ years of experience in IT systems administration or similar role

• Hands-on experience with: 

  • Active Directory and basic Azure AD administration

  • Microsoft 365 (Exchange, Teams, SharePoint)

  • Windows endpoint management and patching

• Basic understanding of networking concepts (VPNs, firewalls, VLANs)

• Familiarity with security best practices and compliance environments

• Strong organizational and documentation skills

• Ability to work independently on assigned tasks with good judgment on escalation

• Active security clearance or ability to obtain a clearance

Applicants must be authorized to work in the U.S. without employer sponsorship and be able to obtain a security clearance

Nice to Have:

• Experience in government contracting or DoD environments

• Exposure to CMMC or NIST 800-171 frameworks

• Familiarity with GCC or GCC High environments

• Experience with Fortinet or similar networking tools

• Relevant certifications (Security+, Network+, or Microsoft certifications)

What to expect in our process

• Apply by submitting a cover letter and resume for the position

• Interview with the Hiring Manager

• Reference checks and degree verification

• Offer

We take care of our employees by providing the following benefits:

• Flexible work schedules and remote/hybrid opportunities (depending on the role)

• Medical, dental, and vision insurance

• Flexible spending account and health savings account options

• Dependent care flexible spending account

• Education reimbursement

• Voluntary insurance such as: short-term disability, hospital indemnity, critical illness, and accident insurance

• 100% company-paid life + AD&D and long-term disability insurance

• Generous paid time off policy

• 11 paid holidays

• 401(k) retirement plan with matching contributions

• Employee assistance program

Equal Opportunity Statement

Building an inclusive, high-performing team that is diverse across lines of personal identity is integral to our success, and we are proud to be an equal-opportunity employer.

This means we do not discriminate against any job applicant or employee because of their race, ethnicity, color, religion, national origin, sex, disability status, genetics, protected veteran status, gender identity or expression, sexual orientation, age, or any other characteristic protected by federal, state, or local laws. This applies to all terms and conditions of employment.

E-Verify Statement

This employer participates in E-Verify and will provide the federal government with your Form I-9 information to confirm that you are authorized to work in the U.S. If E-Verify cannot confirm that you are authorized to work, this employer is required to give you written instructions and an opportunity to contact the Department of Homeland Security (DHS) or Social Security Administration (SSA) so you can begin to resolve the issue before the employer can take any action against you, including terminating your employment. Employers can only use E-Verify once you have accepted a job offer and completed the I-9 Form.