Senior Messaging Engineer - 3rd line - Exchange/Email Security

Job Title: Senior Messaging Engineer - 3rd line - Exchange / Email Security
Location: Hybrid - 2 days per week onsite in London or Leeds
Salary/Rate: Up to £250/day INSIDE IR35
Start Date: ASAP
Job Type: 9 month contract - very likely to extend
Company: Financial Services/Banking client

We are hiring for an SC Cleared Senior Messaging Engineer with strong third-line support experience, deep expertise in Exchange / email security, and the ability to design, improve, and stabilize complex messaging environments.

Key Responsibilities

* Implement, support, and enhance enterprise messaging and email security solutions

* Provide third-line support for messaging-related incidents and escalations

* Manage and improve Exchange Online and Exchange Hybrid environments

* Support and administer secure email gateways and encryption technologies

* Troubleshoot complex messaging issues and drive root-cause resolution

* Lead and contribute to initiatives aimed at simplifying and modernising email estates

* Mentor junior engineers and support first- and second-line teams

* Produce clear technical and user documentation

* Work across multiple workstreams, balancing competing priorities and deadlines

Essential Skills & Experience

* Strong experience with Exchange Online and Exchange Hybrid

* Proven background supporting secure enterprise messaging in complex environments

* Hands-on experience with email security gateways and encryption technologies

* Strong PowerShell scripting and automation skills

* Excellent troubleshooting and problem-solving abilities

* Strong written and verbal communication skills

* Experience mentoring and knowledge-sharing with wider support teams

Desirable Experience

* Experience with Mimecast and/or Clearswift

* Knowledge of email DNS and authentication (SPF, DKIM, DMARC, MX records)

* Experience with email encryption (PGP, TLS, PME)

* Exposure to email journaling and archiving solutions (e.g. Enterprise Vault)

* Experience migrating complex messaging environments to Exchange Online

* Familiarity with Agile delivery and sprint-based working

* Knowledge of ITIL processes (Incident, Problem, Change)

Apply now for immediate consideration