.OFFICE 365 ADMINISTRATOR
Company Description
Optex Systems, Inc., founded in 1987 and based in Richardson, Texas, specializes in manufacturing optical sighting systems and assemblies for Department of Defense applications. Its products are integral to U.S. military land vehicles, including the Abrams, Bradley, and Stryker families of vehicles. Optex provides a wide range of products such as periscopes, rifle sights, surveillance systems, and night vision optical assemblies. The company works closely with military services and prime contractors to deliver high-quality defense solutions.
Office 365 Administrators manage, configure, and secure an organization's Microsoft 365 tenant — covering Exchange Online, Teams, SharePoint, OneDrive, Entra ID, and the surrounding security and compliance stack. They're the operational owners of the collaboration infrastructure that most knowledge workers touch every hour of the workday, responsible for keeping services running, licenses optimized, and environments locked down against modern identity-based threats.
Role at a glance
CITIZENSHIP REQUIREMENTS:
Must be either a U.S. Citizen or Permanent Resident
Typical education
Bachelor's degree in IT/CS, Associate degree, or equivalent hands-on experience
Typical experience
Entry-level to mid-career (6+ years experience highly competitive)
Key certifications
MS-102, SC-300, MS-700, AZ-104
Top employer types
MSPs, large enterprises, mid-market companies, healthcare, finance, legal
Growth outlook
Stable demand driven by the dominant 400M+ seat installed base of Microsoft 365
AI impact (through 2030)
Augmentation and expanded workload — the rollout of Copilot creates significant new demand for admins to manage data governance, permissions, and security risks associated with AI-driven content synthesis.
Duties and responsibilities
- Administer Exchange Online including mailbox provisioning, distribution groups, mail flow rules, and transport layer security connectors
- Manage Microsoft Teams policies — meeting configurations, voice calling plans, channel governance, and guest access controls
- Configure and maintain SharePoint Online site collections, permissions inheritance, hub site architecture, and storage quotas
- Govern Entra ID (Azure AD) user and group lifecycle, conditional access policies, MFA enforcement, and privileged identity management
- Monitor Microsoft 365 service health, investigate tenant-level incidents, and coordinate with Microsoft support on escalations
- Administer Microsoft 365 licensing — assign, reclaim, and optimize SKUs to control costs across user populations
- Implement and tune Microsoft Defender for Office 365 anti-phishing, safe links, safe attachments, and threat investigation policies
- Build and manage Microsoft Purview retention labels, DLP policies, and eDiscovery holds to meet compliance and legal requirements
- Automate routine administrative tasks using PowerShell scripts and Power Automate flows to reduce manual ticket volume
- Create and maintain technical documentation, runbooks, and change records for all tenant configuration and policy decisions
Overview
Office 365 Administrators own the tenant. The incumbent is accountable for every Microsoft 365 workload an organization depends on: email that delivers reliably and doesn't relay spam, Teams meetings that connect without audio dropouts, SharePoint libraries that surface the right documents to the right people, and an identity layer that blocks credential-stuffing attacks without locking out legitimate users who forgot their phone.
A typical week splits across reactive work and proactive management.
The proactive side is where the role creates real value.
The incumbent will hold responsibility for Security of the system(s).
Qualifications
Education:
- Bachelor's degree in information technology, computer science, or a related field (common at enterprise employers)
Certifications:
- MS-102: Microsoft 365 Administrator Expert — the core credential; required or strongly preferred on most job postings
- SC-300: Microsoft Identity and Access Administrator — valuable for roles with heavy Entra ID and zero-trust scope
- MS-700: Managing Microsoft Teams — sought by organizations with large Teams Voice deployments
- AZ-104: Azure Administrator Associate — useful when the M365 role bleeds into Azure resource management
- SC-400: Microsoft Information Protection Administrator — relevant for compliance-heavy environments (legal, finance, healthcare)
Technical skills:
- Exchange Online: mailbox management, transport rules, mail flow connectors, DKIM/DMARC/SPF configuration, hybrid coexistence
- Microsoft Teams: policies, calling plans, direct routing, meeting room device management, governance frameworks
- SharePoint Online: site provisioning, permission models, hub sites, search schema, migration tooling (ShareGate, SPMT)
- Entra ID: conditional access, MFA, group-based licensing, PIM, external identities, app registrations
- Security and compliance: Defender for Office 365, Purview DLP, retention policies, communication compliance, eDiscovery
- PowerShell: Microsoft Graph SDK, Exchange Online PowerShell module, bulk user operations, scheduled automation
- Monitoring: Microsoft 365 admin center service health, Defender portal, Azure Monitor
· The company offers competitive salary and benefits.
The Company will ensure that employees and applicants shall not be subjected to harassment due to their status described above, or any harassment, intimidation, threats, coercion or discrimination because they have engaged in or may engage in any of the following activities; (1) filing a complaint with the Company or with federal, state, or local agencies regarding status covered under this AAP, (2) assisting or participating in any investigation, compliance review, hearing, or any other activity related to the administration of any federal, state, or local equal employment opportunity or affirmative action statute pertaining to the status covered under this AAP; (3) opposing any act or practice made unlawful by section 503 and/or VEVRAA, and (4) exercising any other right protected by section 503 and/or VEVRAA or its implementing regulations in this part.
Benefits:
- 401(k)
- 401(k) matching
- Dental insurance
- Employee assistance program
- Health insurance
- Health savings account
- Life insurance
- Paid time off
- Retirement plan
- Tuition reimbursement
- Vision insurance
Work Location: In person
