Senior Messaging Infrastructure Engineer

The Phoenix Group; New York; Hybrid; USD 120,000 - 180,000; Full time

Job summary

The Phoenix Group Advisors is seeking a senior Messaging/Exchange administrator to design, implement, and optimize enterprise mail infrastructure. You will manage Exchange on-premises and Online, Postfix, and client apps like Outlook, serving as SME for mail systems. Modernization includes Graph API migrations and Outlook integrations.

You will strengthen mail security and anti-spam measures, collaborate across teams, and contribute to GenAI projects related to email tooling and automation.

Qualifications

• 7–10 years of experience managing complex Exchange environments (on-premises and Online) and Postfix.
• Expertise in troubleshooting Outlook client issues and resolving mail system anomalies.
• Strong knowledge of mail security, anti-spam solutions, and threat mitigation strategies.
• Familiarity with EWS, Graph API, MAPI, Office JavaScript, and related APIs.
• Proficiency with scripting and programming languages such as PowerShell, Python, and C#.
• Excellent communication skills and proven ability to collaborate across teams.

Responsibilities

• Design, implement, and optimize messaging infrastructure including Exchange on-premises, Online, and Postfix.
• Serve as senior escalation point and SME for mail systems, ensuring security, performance, and reliability.
• Lead modernization by migrating from EWS to Microsoft Graph API and revamping Postfix deployments.
• Collaborate with development teams on GenAI initiatives, including Outlook add-ins and integrations.
• Enhance mail security and anti-spam strategies using Proofpoint, maintaining a resilient mail environment.

Skills

Exchange administration

Postfix

Outlook troubleshooting

Mail security

Graph API

EWS expertise

MAPI

PowerShell

Python

C#

Education

Bachelor’s degree in Computer Science or related field

Tools

Proofpoint

Microsoft 365

Office 365

Exchange Online

Job description

What You'll Do Day-to-Day:

Design, implement, and optimize messaging infrastructure including Microsoft Exchange (on-premises and Online), Postfix, and client applications such as Outlook and Office 365. Serve as the senior escalation point and subject matter expert (SME) for mail systems, ensuring security, performance, and reliability. Lead modernization efforts by migrating from Exchange Web Services (EWS) to Microsoft Graph API, addressing Outlook COM integrations, and revamping Postfix deployments. Collaborate with development teams on GenAI initiatives, including prototyping Outlook JavaScript add-ins and related integrations. Contribute to enhancing mail security and anti-spam strategies using tools like Proofpoint, maintaining a resilient mail environment.

Required Skills:

• 7–10 years of experience managing complex Exchange environments (on-premises and Online) and Postfix.
• Expertise in troubleshooting Outlook client issues and resolving mail system anomalies.
• Strong knowledge of mail security, anti-spam solutions, and threat mitigation strategies.
• Familiarity with EWS, Graph API, MAPI, Office JavaScript, and related APIs.
• Proficiency with scripting and programming languages such as PowerShell, Python, and C#.
• Excellent communication skills and proven ability to collaborate across teams.

Nice to Have Skills:

• Experience with mail migration projects and platform modernization.
• Hands-on knowledge of cloud communication services and APIs.
• Additional certifications related to Microsoft 365, email security, or messaging infrastructure.
• Understanding of DevOps practices and automation tools.

Preferred Education and Experience:

• Bachelor’s degree in Computer Science, Information Technology, or a related field preferred.
• Prior experience in enterprise messaging system management and modernization initiatives.

The Phoenix Group Advisors is an equal opportunity employer. We are committed to creating a diverse and inclusive workplace and prohibit discrimination and harassment of any kind based on race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, genetic information, disability, or veteran status. We strive to attract talented individuals from all backgrounds and provide equal employment opportunities to all employees and applicants for employment.