Joilson Cerqueira Oliveira Júnior

• Designed and delivered Zero Trust security architectures for Fortune 500 clients, leading security assessments that identified and remediated critical vulnerabilities across cloud environments;
• Hardened enterprise identity security posture through advanced Entra ID configurations, including Conditional Access policy design and risk-based Identity Protection with automated remediation workflows

• Led technical pre- and post-sales engagements POCs, workshops, stakeholder presentations driving solution pipeline growth and Modern Workplace adoption across enterprise accounts;
• Executed large-scale Microsoft Purview data implementation projects, applying sensitivity labeling and DLP policies across terabytes of enterprise data to achieve GDPR compliance while preparing data foundations for

• Led 2 tenant-to-tenant migrations across Microsoft 365 and Google Workspace, managing complex workload transitions through complete IT infrastructure cutover with zero continuity loss;
• Collaborated with Microsoft's product team on Windows 365 Cloud PC architecture during early release, testing and validating real-world deployment scenarios that influenced product design;
• Designed a Windows 3

• Managed a hybrid identity Microsoft 365 environment for 3,000+ users across Europe and Africa, administering communication and collaboration platforms including Teams, Outlook, Power Platform, and SharePoint, ensuring platform reliability and operational continuity across multiple regions;
• Led an organization-wide MFA rollout during COVID-19, resolving device incompatibilities, user resistance

Relocated internationally to Germany, managing visa, administrative, and settlement processes required to establish legal working status in a new country.

• Specialized in SAP Material Management, Logistics, and Warehouse Management modules, supporting Request to Pay, Quality, and Storage processes for one of the world's largest chemical manufacturers;
• Optimized business processes by reducing resolution time for Incidents, Changes, and Service Requests through structured ITIL-aligned workflows;
• Served as the primary liaison for Brazilian clients

Worked as SAP Functional Intern at Tata Consultancy Services.

• Provided Microsoft Windows environment support, managing business applications running on Windows Server 2008 R2 for corporate clients;
• Designed and implemented a new ITIL v3-aligned ticketing system, improving service request tracking and SLA compliance;
• Managed Office 365 hybrid tenant users via Azure AD Connect, ensuring seamless identity synchronization between on-premises and cloud envi

∙ Developed reports using AI techniques and tools to assess the quality of search results from major search engines (Google Search, Microsoft Bing);
∙ Analyzed search results for relevance, accuracy, and completeness;
∙ Identified and reported on trends in search quality;

• Level 2 Service Desk support for IT hardware, Linux, and Microsoft Windows environments;
• Planned, designed, and installed cable infrastructure racks;
• Monitored routers and switches using Zabbix;
• Followed up with hardware partners (DELL Computers/CISCO) to ensure compliance with SLAs;
• Developed a new protective infrastructure solution against corrosive chemical products, increasing the us

• Provided Level 1 and 2 Service Desk support to global users of Windows XP and 7, including user management, access control, and email accounts (Active Directory and Microsoft Exchange Server);
• Developed custom IT reports (ZenDesk) for worldwide management offices;
• Provided full virtualization support, upgrades, and changes of VDI files on Citrix XenApp & XenDesktop for thin clients;
• Reduce

• Provided Level 1 and 2 Service Desk support to local end-users on Microsoft Windows XP and 7, including troubleshooting and resolving technical issues, providing training and support on software applications, and managing user accounts and permissions;
• Developed and implemented a file server backup data plan using PowerShell to ensure the security and integrity of critical data;
• Developed a

∙ Desktop and laptop hardware maintenance, preventive maintenance and user support.

Jan 2026 · Expires Jan 2027

Jan 2026

Jan 2026 · Expires Jan 2027

Jul 2026 · Expires May 2028

Jul 2026

Jul 2026 · Expires Jul 2027

Jul 2026 · Expires Jul 2029

Nov 2025 · Expires Nov 2028

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May 2025

Feb 2025

Mar 2025

Nov 2025 · Expires Nov 2028

Sep 2025

Mar 2024

Jun 2024 · Expires Jun 2027

Sep 2024

Oct 2023

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May 2023