Senior Principal Engineer- M365 Infrastructure, Security And Messaging

Job Purpose The Senior Principal Engineer will lead the design development and implementation of next-generation solutions across Messaging Exchange Online Proofpoint M365 Security components and office M365 infrastructure This position plays a critical role in ensuring seamless demand intake from product capability teams into the engineering portfolio enhancing security posture and architecting scalable compliant and resilient infrastructure solutions across M365 Key Responsibilities Messaging Architecture Lead end-to-end design and engineering of Exchange Online and Proofpoint to ensure reliable messaging services Security Posture Enhancement Strengthen M365 security capabilities tied to email and infrastructure services addressing regulatory and organizational needs Infrastructure Strategy Architect future-ready solutions across Office and M365 infrastructure to optimize scalability and performance Compliance Reliability Ensure platforms meet all regulatory security and performance standards to minimize risks and disruptions Stakeholder Collaboration Collaborate with product teams operations and external vendors to deliver impactful solutions aligned with business objectives Demand Intake Portfolio Alignment Streamline engineering intake processes for efficient alignment with the M365 portfolio strategy Change Release Management Oversee the compliant deployment of infrastructure changes while minimizing risks to operations Technical Debt Management Identify and remediate legacy architecture and vulnerabilities to improve overall platform health Innovation Optimization Drive automation modernization and efficiency improvements across infrastructure layers Leadership Mentorship Provide technical guidance to engineering teams and foster cross-functional collaboration across Core Tech Problem Solving Innovation The Senior Principal Engineer is responsible for addressing complex infrastructure and security challenges anticipating future needs and designing resilient systems to elevate user experience across GSK s enterprise landscape Required Skills Qualifications 15 to 18 years of professional experience with bachelor s or master s degree in computer science or a related field 10 years of experience in infrastructure and operations 8 years in overall M365 infrastructure messaging and security 4 years in engineering and architecture roles Expertise in security network and record retention requirements Experience managing both on-premise and cloud-hosted solutions Proficiency in automation workflows across enterprise services Knowledge of industry best practices for real-time monitoring across large-scale networks Strong communication skills for effective collaboration with technical and business teams Proven track record of tactical execution in regulated environments Hands-on experience with Agile methodologies e g SAFe and IT Service Management ITSM Experience engaging distributed teams across multiple time zones Experience in Agentic AI tools is desired Inclusion at GSK As an employer committed to Inclusion we encourage you to reach out if you need any adjustments during the recruitment process Please contact our Recruitment Team at to discuss your needs Why GSK Uniting science technology and talent to get ahead of disease together GSK is a global biopharma company with a purpose to unite science technology and talent to get ahead of disease together We aim to positively impact the health of 2 5 billion people by the end of the decade as a successful growing company where people can thrive We get ahead of disease by preventing and treating it with innovation in specialty medicines and vaccines We focus on four therapeutic areas respiratory immunology and inflammation oncology HIV and infectious diseases - to impact health at scale People and patients around the world count on the medicines and vaccines we make so we re committed to creating an environment where our people can thrive and focus on what matters most Our culture of being ambitious for patients accountable for impact and doing the right thing is the foundation for how together we deliver for patients shareholders and our people Important notice to Employment businesses Agencies GSK does not accept referrals from employment businesses and or employment agencies in respect of the vacancies posted on this site All employment businesses agencies are required to contact GSK s commercial and general procurement human resources department to obtain prior written authorization before referring any candidates to GSK The obtaining of prior written authorization is a condition precedent to any agreement verbal or written between the employment business agency and GSK In the absence of such written authorization being obtained any actions undertaken by the employment business agency shall be deemed to have been performed without the consent or contractual agreement of GSK GSK shall therefore not be liable for any fees arising from such actions or any fees arising from any referrals by employment businesses agencies in respect of the vacancies posted on this site It has come to our attention that the names of GlaxoSmithKline or GSK or our group companies are being used in connection with bogus job advertisements or through unsolicited emails asking candidates to make some payments for recruitment opportunities and interview Please be advised that such advertisements and emails are not connected with the GlaxoSmithKline group in any way GlaxoSmithKline does not charge any fee whatsoever for recruitment process Please do not make payments to any individuals entities in connection with recruitment with any GlaxoSmithKline or GSK group company at any worldwide location Even if they claim that the money is refundable If you come across unsolicited email from email addresses not ending in gsk com or job advertisements which state that you should contact an email address that does not end in gsk com you should disregard the same and inform us by emailing askus gsk com so that we can confirm to you if the job is genuine