Lester Calixtro

Senior Systems Engineer & Cloud Specialist

Results-driven infrastructure architect with extensive experience optimising complex IT ecosystems across AWS, Azure, and hybrid environments. I build resilient systems, automate everything, and keep organisations secure and compliant.

Get in Touch
7+
Years in IT
2
Cloud Platforms
AWS
+ Azure Certified

Core Competencies

What I Bring

☁️
Cloud Infrastructure
Architecting and managing scalable cloud environments on AWS and Azure, including migration initiatives and cost optimisation.
🔒
IT Security & Compliance
Implementing robust security protocols, identity management (ADFS, Active Directory), and ensuring governance across all layers.
⚙️
Automation & Scripting
Driving efficiency through PowerShell automation, reducing manual overhead and enabling proactive system management.
🛡️
Disaster Recovery
Designing and testing comprehensive DR plans to ensure business continuity and minimal RTO/RPO across critical systems.
📊
Incident Management
Leading high-impact incident response with clear communication, documented resolutions, and root-cause analysis.
🔧
Server & Virtualisation
Deep expertise in Windows Server, virtualisation technologies, and hybrid infrastructure management at enterprise scale.
Cloud Environments
AWS Microsoft Azure Azure AD / ADFS Microsoft Intune
Operating Systems
Windows Server Linux Mac OS X Active Directory
Tools & Platforms
Jira Confluence Mimecast Sophos Defense.com JumpCloud Google Suite PowerShell Okta Iru

Key Achievements

Projects

01
Business Migration — EPOS Implementation
Led the installation and configuration of EPOS till machines during a large-scale business migration, ensuring a seamless operational transition with zero disruption to trading.
02
Store IT Infrastructure Setup
Managed end-to-end store setup including all IT-related equipment procurement and network configuration, optimising operational efficiency and network performance from day one.
03
Film Content Protection Agency (FCPA) Award
Contributed to winning the FCPA award by enhancing the organisation's film security posture and recognition, demonstrating a commitment to industry-leading content protection standards.

Qualifications & Certifications

Education

Certifications
AZ-900: Microsoft Azure Fundamentals Exam Prep — Udemy (April 2024)
Certificate of Attendance: Linux System Administration
Certificate of Attendance: Systems Operations on AWS
Certificate of Attendance: AWS Technical Essentials

Let's Connect

Get In Touch

I'm open to senior engineering roles, cloud infrastructure projects, and challenging IT leadership opportunities. Let's talk about how I can help your organisation thrive.

✉ lester_calixtro@yahoo.co.uk 📞 07850 452 099 in linkedin.com/in/lestercalixtro 📍 Rainham, RM13 8PF