Daniel Barrera Ramírez

Soy un profesional de TI con experiencia en soporte técnico, infraestructura y administración de sistemas. Cuento con conocimientos en entornos Windows, Microsoft 365, Active Directory, redes y atención a usuarios, brindando soluciones eficientes tanto de forma remota como en sitio. Me distingo por mi capacidad de análisis, orientación al servicio y enfoque en mantener la continuidad operativa de los servicios tecnológicos.

 P3 – Microsoft Analyst Mexico City | Sept 2025 – Feb 2026

• Administered enterprise Active Directory Domain Services (AD DS) in multi-domain environments,

managing OU structure, FSMO roles, replication health, and privilege governance.

• Designed, implemented, and hardened Group Policy Objects (GPOs) to enforce security baselines, endpoint compliance, and configuration standardization.
• Managed hybrid identity infrastructure using Microsoft Entra ID (Azure AD) and Azure AD Connect,

ensuring secure synchronization and authentication across federated forests.

• Administered and optimized Microsoft 365 services, including Exchange Online, Conditional Access Policies,

and Multi-Factor Authentication (MFA).

• Managed 20,000+ enterprise endpoints using Microsoft Endpoint Configuration Manager (SCCM/MECM),

automating OS deployments, patch management, compliance enforcement, and software distribution.

• Led Windows 10 to Windows 11 migration projects aligned with Microsoft lifecycle policies and enterprise security standards.
• Implemented security solutions including Microsoft Defender for Endpoint, Azure Advisor, and vulnerability remediation strategies.
• Designed and executed hybrid cloud migration initiatives to Microsoft 365 and Azure, contributing to SOW documentation, Proof of Concept (PoC), and technical proposals.
• Automated administrative and reporting processes using advanced PowerShell scripting and Microsoft

Graph API integrations, reducing manual workload by 70%.

• Developed executive dashboards in Power BI to monitor compliance, system health, and security posture.
• Performed advanced troubleshooting of SCCM infrastructure (PXE, Task Sequences, Client Health,

Distribution Points) and Active Directory replication issues.

• Provided Level 2 and Level 3 escalation support, resolving critical incidents related to Kerberos/NTLM authentication, GPO conflicts, and endpoint management.
• Conducted Active Directory cleanup and OU restructuring initiatives to optimize policy inheritance and reduce security risk exposure.
• Participated in Microsoft licensing coordination and cloud subscription optimization.

 Compucom – Desktop Services Team Lead | Mexico City | Sept 2019 – Apr 2025

• Supervised and guided the IT Service Desk team, ensuring efficient daily operations, high service standards,

and compliance with corporate objectives.

• Acted as the main point of contact for the team, fostering a culture of collaboration and results-oriented service.
• Managed technical support operations and participated in infrastructure projects using Microsoft technologies: SCCM, AD, GPO, and Intune.
• Led the Windows 10 to 11 migration, meeting Microsoft’s support deadlines.
• Liaised with Microsoft for licensing and cloud integration.
• Designed and implemented migration projects to Azure, Microsoft 365, and Copilot.
• Drafted technical documentation, SOWs, PoCs, and tailored enterprise proposals.
• Administered 20,000+ endpoints using SCCM, automating deployments, patching, and policy compliance.
• Structured and maintained multi-domain AD and GPOs to enhance endpoint security.
• Supported hybrid identity implementation with Azure AD Connect and federated forests.
• Diagnosed complex PXE, SCCM client, and task sequence issues, reducing deployment times.
• Automated tasks with PowerShell, reducing manual effort by 70%.
• Created Power BI dashboards for executive reporting on compliance and system health.
• Led AD cleanup and OU restructuring to optimize policy application.
• Supported budget control and department expenditures.
• Acted as Solutions Consultant and Microsoft 365/Azure Engineer in hybrid environments.
• Implemented Microsoft solutions like Defender, M365, Azure Advisor, Migrate, and Block64 for security assessments, inventory, and migration.
• Participated in end-to-end Microsoft 365, Azure, and Copilot migrations.
• Designed cloud architectures and developed technical and commercial proposals (SOW, PoC, PoE).
• Contributed to technical bid processes and deliverable tracking.
• Provided Level 2 and 3 incident resolution.
• Diagnosed and resolved network, hardware, and software issues.
• Implemented preventive maintenance for over 20,000 endpoints.
• Automated repetitive tasks with PowerShell, reducing support time.
• Managed security policies and compliance via GPOs and Azure Intune.
• Coordinated technical support team, ensured SLA compliance, and documented incidents.

 Tiba IT Services – BitLocker & PowerShell Specialist | Mexico City | Dec 2018 – Aug 2019

• Specialized in BitLocker and PowerShell, assigned to a critical Compucom project focused on security policy enforcement.
• Automated BitLocker activation and credential backup in Active Directory via PowerShell.
• Planned and implemented security measures and auditing systems to ensure compliance.
• Supported domain trust configurations and federation planning in hybrid environments.
• Conducted security audits on domain policies with improvement recommendations for Active Directory

GPOs.

• Documented technical procedures to ensure operational continuity and compliance.
• Aligned tasks with corporate cybersecurity standards and hardening practices.

 Grupo HMV – Infrastructure Specialist | Mexico City | Oct 2018 – Dec 2018

• Provided technical consulting for infrastructure projects in potential clients, conducting analysis and tech improvement proposals.
• Implemented strategies to reduce operational costs through sustainable solutions in networks, systems, and storage.
• Planned security measures and conducted system audits to strengthen internal cybersecurity posture.
• Responsible for consolidating, managing, and ensuring availability of critical business information.
• Assisted in budget management, expense control, and preparation of proposals and executive reports.
• Fostered team collaboration to achieve shared goals, implementing IT policies and procedures.
• Applied time and resource management best practices to optimize infrastructure processes.
• Advised on SCCM-based software deployment aligned with AD (OU) structures.
• Recommended domain federation settings for client integration scenarios.
• Documented technical processes and reports to support IT strategic decisions.

 York RSG INTL México – Infrastructure and Technology Lead | Mexico City | Apr 2018 – Oct 2018

• Led staff training on G-Suite and Microsoft ecosystem tools.
• Managed and ensured high availability of critical internal systems.
• Implemented, configured, and administered servers, applying hardening and continuous monitoring to enhance security.
• Served as Project Manager for the complete G-Suite implementation cycle: evaluation, planning, acquisition,

installation, configuration, administration, monitoring, and maintenance.

• Coordinated preventive maintenance and incident response to mitigate tech risks.
• Reduced response times and increased system availability through proactive monitoring.
• Documented technical procedures and internal infrastructure and security policies.

 Digital Experience, S.A.P.I de C.V. – Infrastructure Lead | Mexico City | Mar 2017 – Apr 2018

• Provided infrastructure leadership focused on Microsoft ecosystems and licensing compliance.
• Trained staff in Microsoft solutions and operational best practices.
• Managed and ensured internal systems availability.
• Performed hardening and proactive monitoring of critical servers.
• Provisioned Windows Azure servers for various projects.
• Managed GPO and Active Directory policies and configurations.
• Deployed Microsoft Office 365 with centralized AD-based licensing.
• Administered SCCM and System Center automation tools.
• Redesigned GPOs to optimize login times and system compliance.

 La Cosmopolitana, S.A. de C.V. – Infrastructure Manager | Mexico City | Mar 2014 – Mar 2017

• Managed enterprise-level IT infrastructure including Microsoft systems, VMware, vSphere, and SCCM.
• Trained staff on Microsoft software and administrative tools.
• Ensured availability of internal and external systems (corporate, Zurich, CEDA).
• Managed and maintained virtual servers (VMware, vSphere, vCenter, ESX).
• Coordinated integration of over 60 companies, consolidating data and infrastructure.
• Deployed Azure servers to support cross-functional projects.
• Led full project lifecycles: planning, procurement, installation, and monitoring.
• Administered SCCM for 4,500+ endpoints, optimizing deployments and patching.
• Applied GPOs and configuration baselines to standardize environments.
• Executed AD object cleanup and OU restructuring for better segmentation.
• Developed WQL/SQL reports via SSRS to monitor system health and compliance.
• Integrated WSUS with SCCM, achieving 98% patch compliance.
• Implemented federated trusts for consolidated authentication across business units.

 Aspen Labs, S.A. de C.V. – Network, Communications & Database Admin | Mexico City-Toluca | Nov 2008 –

Feb 2014

• Trained staff on Microsoft software and MAPIC Syteline ERP.
• Managed and ensured availability of internal systems in Toluca operations.
• Administered servers, workstations, and laptops.
• Led integration project for Aspen Labs, Pfizer, and Nestlé across LATAM (Ecuador, Peru, Chile, Caricam,

Venezuela, Argentina, Costa Rica, Colombia).

• Designed and implemented voice/data infrastructure, VPNs, and email systems across countries.
• Documented technical processes and provided multi-level support to regional entities.

 Elasticintas Teresita, S.A. de C.V. – Network, Communications & Database Admin | S.L.P. & CIVAC | Jul 2001

– Nov 2008

• Trained staff on Microsoft software and MFG/PRO ERP.
• Ensured system availability in S.L.P and CIVAC plants.
• Administered servers, workstations, and printers (laser and Zebra).
• Led firewall and 3Com perimeter filter implementation project to secure networks.
• Centralized antivirus management using McAfee: deployment, control, and agent monitoring.
• Provided support for Motorola VT2124RB Vonage IP telephony.
• Managed PROGRESS databases and supported plant operations.
• Produced, edited, and transferred training videos.
• Produced photographic content for catalogues and website.
• Implemented wireless networks and printing infrastructure in production areas.

Bachelor’s in Computer Science – National Autonomous University of Mexico (U.N.A.M.), 1996