César Chacón Contreras
Senior Microsoft 365 & Endpoint Engineer — Enterprise Identity & Device Management
Over 10 years engineering and operating large-scale Microsoft 365 environments for enterprise organizations. Deep ownership of Intune, Entra ID, and hybrid infrastructure serving 1,500+ users and 3,000+ managed endpoints — with consistent SLA delivery above 98%.
Operational Scale & Impact
Quantifiable results from enterprise production systems— not estimates, not projections.
Where I Operate
at Depth
Eight interconnected capability domains built through 8+ years of L3 operations, migrations and architecture in hybrid enterprise Microsoft environments.
Career History
- Managed and resolved L3 endpoint and cloud incidents for a portfolio of 10 enterprise customers (1,500+ users, 3,000+ managed devices), including VIP accounts such as Mercedes-Benz Iberia and Mercedes-Benz UK, with strong focus on Microsoft Intune / Endpoint Manager and Azure AD (Entra ID).
- Owned the end-to-end incident lifecycle across ServiceNow and Remedy, consistently meeting SLA targets (>98% compliance) in high-volume enterprise environments.
- Coordinated 100–150+ incidents per week during escalation cycles, ensuring prioritization, resolution and escalation across production environments.
- Led advanced troubleshooting of device enrollment, compliance policies, application deployments and AD/Azure AD synchronization issues within complex hybrid infrastructures.
- Provided advanced technical support involving SQL Server, Active Directory, Azure AD synchronization and Microsoft Intune migrations.
- Supported DocuWare Cloud and On-Premise environments, ensuring endpoint integrations, security policies and workflow continuity for enterprise customers.
- Collaborated with the Architecture team supporting JSON-based workflow execution, including manual triggering of jobs, schedule adjustments and root cause analysis of failed executions in production environments.
- Led client migrations to Exchange Online, Azure AD and Microsoft Intune, including user synchronization, device enrollment, Conditional Access configuration and application packaging/deployment.
- Produced SLA, compliance and operational reports for management using Excel and Power BI, supporting service review meetings and data-driven decision-making.
- Coordinated B2C special campaigns, managing multi-task operational projects across cross-functional and international teams.
- Oversaw PromoCaixa programs, delivering weekly performance and KPI reports covering sales, orders and profitability for stakeholders in the UK and Manila.
- Developed advanced dashboards using Excel and SAP, supporting price control, promotions and campaign tracking.
- Supported incident resolution and secure operations, including VPN setup and maintenance, ensuring business continuity during active campaigns.
- Ensured smooth execution of campaigns and operational processes, contributing to improved efficiency and customer satisfaction across international markets.
- Provided L1–L2 support in enterprise environments, handling incident intake via calls at L1 and managing escalated tickets at L2 through ServiceNow, ensuring SLA compliance.
- Owned incidents end-to-end, from first customer contact through resolution or escalation, ensuring accurate documentation and communication.
- Managed Azure AD / Active Directory user lifecycle and administered Microsoft 365 environments, including Exchange Online, Teams, security and troubleshooting.
- Executed user and device migrations using Microsoft Intune / Endpoint Manager, including Conditional Access and MFA configuration.
- Supported enterprise environments and business-critical applications, maintaining service quality across production systems.
- Acted as backup Team Lead, supporting ticket prioritization, workload coordination and mentoring of junior team members.
Education & Formation
Formal computer science foundations combined with international language training across three countries.
Spain
Bachelor’s Degree in Computer Science
Four-year engineering programme with strong foundations in programming, networks and systems administration. Developed hands-on skills in Microsoft-based environments, operating systems, database design and software engineering — directly applied in every enterprise role since graduation.
United Kingdom
One-Year Language Programme
Intensive international language programme covering English, Italian and Portuguese. Achieved native-level proficiency in English and Portuguese; Italian consolidated to B1. Living and studying in London built the cross-cultural communication skills essential for working with international enterprise clients.
Language Proficiency
CEFR Framework — 4 Languages
Mother tongue. Full command — oral and written — across corporate and technical environments.
Bilingual. Fluent across technical, formal and colloquial contexts — Portugal & Brazil variants.
Bilingual since childhood. Fluent across technical, formal and colloquial contexts — US & UK variants.
Fluent communication in professional and everyday settings. Solid oral and written comprehension.
Tools & Technologies
Every tool listed here has been used in real enterprise environments — not just studied or certified. Click any skill to see where and how it was applied.
Engineering Notes & Analysis
Documented findings from real enterprise deployments — not tutorials, not product marketing.
It’s time to play
Real-world enterprise scenarios. No Google. No hints. Prove your M365 engineering instincts.