Founded in 1976, CGI is among the largest independent IT and business consulting services firms in the world. With 94,000 consultants and professionals across the globe, CGI delivers an end-to-end portfolio of capabilities, from strategic IT and business consulting to systems integration, managed IT and business process services and intellectual property solutions. CGI works with clients through a local relationship model complemented by a global delivery network that helps clients digitally transform their organizations and accelerate results. CGI Fiscal 2024 reported revenue is CA$14.68 billion and CGI shares are listed on the TSX (GIB.Experience: 10+ years

Employment Type: Full Time

Bachelor's degree in Computer Science or related field or higher with minimum 3 years of relevant experience.

The Messaging Architect is a member of the Global Collaboration Services and UX Governance team. Enterprise Email & Messaging (Postfix, Exchange Online, Hybrid Exchange)

- Email Security & Hygiene (Proofpoint)
- Microsoft 365 & Identity integrations
- Postfix & SMTP / Email Relay Architecture

o Architect, deploy, migrate, upgrade, and maintain Postfix-based SMTP relay platforms on Red Hat Linux.

Postfix internals, mail flow, queues, transports, and policies

- SMTP authentication (AD-based and local authentication)
- TLS, certificates, and secure relay configurations
- High availability, performance tuning, and scaling Postfix environments

o Experience with other Linux-based email components/MTAs.

o Design end-to-end mail relay architecture, including:

- Network flows, firewall rules, and routing
- o Strong automation and scripting skills for Linux email platforms.

o Reporting experience exporting smart reports segregating source applications based on private/public Ips.

- Microsoft Exchange & Microsoft 365
- Architect and manage Exchange Online for large enterprise environments.

• Strong experience with:

o Exchange Online / Exchange Online Protection (EOP)

o Hybrid Exchange (Exchange 2019)





o Public/private Certificate renewal/management

• o Purview (DLP, retention policies, sensitivity labels, eDiscovery)

o Microsoft 365 tenant management

Outlook (Windows/Mac), IMAP, POP3, mobile devices, Active Sync, Intune over Up-to-date Authentication protocol.

- Keep a tab Microsoft 365 notification and be pro-active on communicating, planning and executing.
- Proofpoint – Email, Network, DNS Security & Hygiene
- Strong hands-on experience with Proofpoint email security platforms.
- Architect and manage end-to-end Proofpoint + Exchange Online integrations.
- o Email hygiene policies

o Firewall policies, Domain integration, Whitelist/Blacklist

Ability to collaborate closely with network, server, and security architects.

- Migration & Transformation
- Extensive experience in large-scale migrations, including:

o On-premise to cloud migrations

Perform discovery, scoping, and estimation (LOE), wave wise data migrations for messaging transformation projects.

- Provide in-person and remote support during migration and cutover and Hyper-Care phases.
- Experience working with 3rd party tools like Quest On Demand, Sharegate, Avepoint etc.
- Experience working on MS places and onboarding new offices, integration, building, desks, pools etc.
- Strong PowerShell scripting capabilities for Exchange, Entra ID, and Microsoft 365 with Entra ID SPN/app-based unattended approach.
- Experience with Microsoft Graph / REST APIs for automation and integration.
- Power Platform based automation (power-Apps, Power Automate, Power BI) is a strong advantage.




- Good-to-have experience integrating messaging platforms with CPaaS solutions.
- Ensure technical architecture documents (TAD), KBs, and operational guides are created, maintained, and up to date.
- Provide Level 3 support for complex mail and messaging incidents.
- Educate and upskill Level 1 and Level 2 support teams.
- o Current architectures

o Microsoft roadmap and enterprise impact

o Postfix (Red Hat Linux) –proven Expertise

o Exchange Online / Hybrid Exchange

o Microsoft 365 & Entra ID

o Microsoft Graph / REST APIs

o Strong troubleshooting skills with ability to identify and resolve performance, stability, and availability issues.

o Experience working in large, global enterprise environments.

o Strong understanding of digital security principles.

o Ability to communicate complex technical topics to non-technical audiences.

o Experience with integrated Cloud SaaS and IaaS solutions.

o Innovation mindset with focus on security, governance, and service quality.

o CPaaS platform integration experience (InfoBip, Sinch, Twillio etc)

• o Teams / Sharepoint exposure

o Power Platform experience with Power Automate/Apps/BI

Proven experience of delivering process efficiencies and improvements

- Clear and fluent English (both verbal and written)
- In addition, CGI is committed to providing accommodations for people with disabilities in accordance with provincial legislation. Please let us know if you require a reasonable accommodation due to a disability during any aspect of the recruitment process and we will work with you to address your needs.

Here, you’ll reach your full potential because…

That’s why we call ourselves CGI Partners rather than employees. Here, you’ll reach your full potential because…

That’s why we call ourselves CGI Partners rather than employees. To support our recruitment team, AI tools may be used to help assess applications though they never replace human judgement.

📌 Service Architect - Remote (Chennai)
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