.About AtosAtos is a global leader in digital transformation with 107,000 employees and annual revenue of over € 11 billion. European number one in cybersecurity, cloud and high performance computing, the Group provides tailored end-to-end solutions for all industries in 71 countries. A pioneer in decarbonization services and products, Atos is committed to a secure and decarbonized digital for its clients. Atos is a SE (Societas Europaea), listed on Euronext Paris and included in the CAC 40 ESG and Next 20 Paris Stock indexes.The purpose of Atos is to help design the future of the information space. Its expertise and services support the development of knowledge, education, and research in a multicultural approach and contribute to the development of scientific and technological excellence. Across the world, the Group enables its customers and employees, and members of societies at large to live, work and develop sustainably, in a safe and secure information space.**Job Title: Messaging Lead Engineer Job Description**:Job Responsibilities- Identify and perform the daily operational tasks that are necessary to provide stable and robust Exchange/Teams/Skype environments, including monitoring, proactive maintenance, and problem resolution.- Provide tier three troubleshooting support of Exchange/Teams/Skype issues; investigate user escalation calls, finding optimum solutions for both users and the company.- Perform scripting administration tasks and reporting using PowerShell or other scripting technology, developing scripts for automating processes within the environment.- Represent the department to other groups in the company and with external vendors. Facilitate and/or coordinate interactions with these parties as needed to deliver results.- Take ownership of the most complex messaging issues and work to resolution and root cause identification.- Participate in off-shift maintenance and troubleshooting activities, as required.- Assess and perform systems utilization and headroom reports to assist in troubleshooting and performance tuning.- Assist in defining and coordinating team projects and activities.- Help ensure team performance meets or exceeds defined Service Level Agreements.- Analyze new technologies and advise management on suitability and implementation.- Maintain & perform periodic testing of disaster recovery procedures for the MS Exchange, Skype for Business, etc. environments.- Adhere to and help enforce change management and compliance processes.- Work with key business users to understand the business requirements and identify potential messaging solutions.Job Requirements Skills, Knowledge, & Experience- Proven troubleshooting skills and ability to understand complex relationships between components of multi-tiered and distributed mail systems.- Strong understanding of mail dependencies with DNS, routing, relays, and emerging technologies around encryption, TLS, SPF, DMARC, and DKIM