Engineer III Software (Microsoft 365)

External Crown Castle Careers•Houston, TX

3d•Hybrid

About The Position

For more than three decades, Crown Castle has led the way in shared communications infrastructure, delivering profitable solutions by connecting communities, businesses, and people, and enabling each to thrive with reliable access to voice and data in more places, faster than ever before. When you join Crown Castle, you become part of a dynamic team of passionate and collaborative professionals engaging in complex challenges and contributing to projects that shape the future of life and work. The Microsoft 365 Engineer III will be hands-on in operating, securing, and advancing Crown Castle’s Microsoft 365 platform. You will design and deliver reliable, low-friction collaboration and messaging services across the M365 suite—SharePoint Online, Exchange Online, Teams, OneDrive, and Entra ID. Your contributions will introduce standardization, modernization, and automation, and you will build and support the M365 services consumed by teammates across the enterprise.

Requirements

Bachelor’s degree or higher or equivalent in Computer Science, Engineering, Information Systems, or related discipline
5+ years of experience administering and engineering Microsoft 365 in large enterprise environments, with broad competency across all core workloads
Deep, demonstrable expertise in SharePoint Online—site collection and information architecture, permissions and governance, content migration, and end-user enablement
Extensive proficiency administering Exchange Online, including mail flow, transport rules, connectors, mobile device access, mail enabled security groups, and message hygiene
Hands-on experience with on-premises Exchange Server and Exchange hybrid deployments, including mailbox migrations and coexistence
3+ years of experience with PowerShell scripting and automation for M365 administration (Exchange Online, SharePoint Online, and Microsoft Graph)
Experience with Microsoft Teams administration, including governance, policies, and telephony/voice where applicable
Working knowledge of Entra ID (Azure AD), including identity, conditional access, and directory synchronization (Entra Connect / AAD Connect)
Familiarity with Microsoft Purview security and compliance tooling—DLP, retention, and sensitivity labels
High degree of collaboration and influence; able to dissect complicated technical problems and apply sound judgment
Strong analytical, problem-solving, and communication skills, with the ability to document, standardize, and continuously improve operational practices

Nice To Haves

Microsoft 365 certifications preferred (e.g., Microsoft 365 Certified: Administrator Expert, Messaging Administrator Associate, Teams Administrator Associate)

Responsibilities

Engineer, administer, and optimize the Microsoft 365 platform across all core workloads—Exchange Online, SharePoint Online, Teams, OneDrive, and Entra ID—ensuring reliable and performant service delivery
Serve as the senior subject-matter expert for SharePoint Online, designing site and information architecture, permissions models, and governance for enterprise content and collaboration
Administer and optimize Exchange Online and hybrid Exchange environments, including mail flow, transport rules, connectors, and coexistence with on-premises Exchange
Lead messaging migrations and hybrid configurations between on-premises Exchange and Exchange Online, ensuring secure and seamless mailbox coexistence
Develop automation using PowerShell, Microsoft Graph, and the Power Platform to standardize provisioning, configuration, and lifecycle management across M365 services
Implement and maintain security and compliance controls—data loss prevention, retention, sensitivity labeling, and conditional access—in alignment with current standards
Assess production readiness of new M365 features and services, defining operational characteristics, maintainability, and adoption guidance
Establish best practices and build tooling to drive consistent configuration, monitoring, and the adoption of M365 capabilities by teams across the organization
Collaborate with stakeholders, architects, and business partners to ensure current and planned M365 solutions meet the growth and transformation needs of our rapidly scaling organization

Benefits

Comprehensive healthcare plans with highly company subsidized premiums and up to $2,000 annual company contribution to your Health Savings Account (HSA base plan for employee and dependents).
Market-leading 401(k) plan, which includes up to 10% company contributions through our 5% match and 5% profit sharing program (based on employee contributions).
New-child leave up to 8 weeks of 100% paid leave upon birth or legal adoption of a new child.
Birth mothers are eligible for up to 8 weeks of additional 100% paid medical leave.
Tuition reimbursement up to $5,250 per year of eligible tuition and fees.
Crown Castle scholarship program awarding up to $10,000 per recipient each year for eligible dependent children of employees and interns.
Matching charitable contributions to qualified charitable organizations of up to $1,000 per year per teammate.
Generous paid time-off for eligible full-time employees (minimum 18 days per year based on years of service).
10 company holidays plus 2 floating holiday.
All offices provide free beverages and snacks.