Dynamic, innovative, problem solving, IT Professional.

RENE CASTILLO

Miami, Florida USA 305-***-**** **.**.*****@*****.*** linkedin.com/in/rene-castillo-419b88149 Dynamic, innovative, problem solving, IT Professional with exceptional relationship management skills and business acumen who aspires to contribute value, evolve, and grow with an organization. EDUCATION

FLORIDA INTERNATIONAL UNIVERSITY

Bachelor of Business Administration-Management Information Systems 2006 – 2008 CISCO NETWORK ACADEMY

Associate of Science – Network Services Technology, Cisco Network Academy 2004 – 2006 SKILLS

Communication and Stakeholder Management

Business Operations Management and Support

Migrations, Acquisitions, Integrations

Operational Continuity (Plan, Test, Prevent, Mitigate)

Infrastructure and Endpoint Administration

Vendor Relationship Management

Distributed Cloud (Azure, AWS, GCP)

Anywhere Operations (Secure Remote Access & Support) PROFESSIONAL EXPERIENCE

Sr. Systems Engineer Infrastructure, Web, Mobility & Desktop Engineering Lennar Miami, Florida Dec 2023 - Current

Deployment, maintenance of infrastructure, and creation of processes with specific focus on the security of the Infrastructure, End-point protection, Application security, Mobile Security, and Identity and Access Management

Managed Entra ID users, groups, systems, applications and endpoints (12,000 Lenovo PCs, 600 Macs, 20,000 iOS) with MDM tools (Intune, AirWatch, Lansweeper) migrated onsite and remote deployments to Entra using Autopilot

Responsible for vulnerability remediation: patched servers, endpoints, applications and technology tools

Led and directed internal LIII team on the design, creation, and implementation of workflows and repeatable frameworks of automations, integrations, configurations, and support ensuring efficient delivery of solutions

Created and maintained internal Sharepoint knowledgebase repository with up-to-date technical documentation of implemented standards, IT policies, SOPs and processes involving technical writers for uniformity

Implemented and rolled out MS 365 copilot companywide with phased approach complete with scaling out licensing

Led migration of MacOS devices from AirWatch (Workspace One) MDM to Intune

LIII escalation support, LII training for newly created outsourced PwC Technology LII, executive level support IT Business Operations & Integrations Manager CHRISTOPHER COLUMBUS HIGH SCHOOL Miami, Florida Aug 2022 – Nov 2023

Directed, implemented, and managed IT Business Operations: ERP, SIS, Infrastructure, Cloud Solutions, Cybersecurity, Identity and Access Management, User Management, Asset and Resource Management, Application Management and Delivery, Business Collaboration Solutions Systems, Business Continuity, Vendor Management, Risk Management, Incident Response Management, Problem Management, Disaster Recovery

Led and directed internal team and external vendors for the design, creation, and implementation of workflows and repeatable frameworks of automations, integrations, and configurations, ensuring delivery of efficient solutions and operations to meet business needs of all stakeholders and improved efficiency and functionality

Managed Information Technology vendor relationships and budget

Responsible for planning, execution, and successful completion of major Information Technology projects on time and on budget:

o Overhauled organization’s identity and access management (IAM) for user authentication integrating AD, Azure, Google Workspace, and all disparate production applications, technologies, and systems by establishing Azure based Central User Repository and Azure as the identity provider (IdP) o Implemented cybersecurity posture improvements, rolling out multifactor authentication (MFA), single sign on (SSO) and Cybersecurity culture overhaul including user education campaign o Restructured user access management on SIS and ERP systems to manage identities, privileges, and resource allocation enforcing zero trust principles and least-privilege access o Standardized business processes, creating repeatable frameworks increasing efficiency o Developed business continuity strategy, established, and tested disaster recovery procedures Senior Systems Engineer WIN SYSTEMS Miami, Florida (Remote) Sep 2020 – Aug 2022

Administered and supported infrastructure for global gaming and entertainment industry clients remotely

Supported over 350 international sites deploying technologically advanced solutions

Focused on network and server-based flagship product WIGOS Casino Management System

Performed security monitoring, vulnerability management, API configurations, and services integration for English and Spanish language systems on premises, cloud and hybrid environments ensuring operational continuity

Deployed and managed on-site infrastructures complete with firewalls, routers, switches, DNS, and DHCP services, VPNs as well as Windows servers domains, with Active Directory and GPO's

Set up and managed Virtual Private Clouds on AWS using multiple EC2 instances, incorporating S3 as needed

Used vCenter Server to manage and monitor different vSphere environments with single ESXi hosts as well as some with ESXi clusters. Used PRTG Network Monitoring Tool to monitor servers and infrastructure components IT Solutions Consultant H&CO TECHNOLOGY ADVISORS Miami, Florida Aug 2017 – Aug 2020

Provisioned, managed, and supported IT infrastructure for H&CO conglomerate and corporate clients with operational continuity and 99.999% availability for on premises, distributed cloud, and hybrid environments

Managed Office 365 multi-tenant environment: licensing, subscriptions, and services

Configured, supported, and maintained O365, VMWare, AWS, Citrix, Cisco Meraki, Azure, VOIP, and multi-tenant AD environment for over 200 external clients providing IaaS, PaaS, and SaaS solutions

AD and O365 migrations and acquisitions, domain transfers, including access control and security management

Addressed vulnerabilities and other security issues on systems and network devices

All-inclusive technical support and customer service directly to internal end users and external clients Network Administrator ATLANTIC BIOLOGICALS, INC. Miami, Florida June 2013 – Aug 2017

Led technology strategy, managed, and supported business technologies for 9 companies, including 15 sites under the Atlantic Biologicals corporate umbrella with a proactive approach and focus on operational continuity, budget management and scalable infrastructure (UDOSE, Unit Dose Services, NASRX, Unit Dose Solutions, etc.)

Slashed Information Technology annual operating costs by 15%, while optimizing infrastructure

Planned, executed, and completed organization-wide multi-site infrastructure design, configuration, and installation on time and on budget including datacenter migration and deployment of MPLS mesh network improving connectivity, scalability, and security while maintaining operational continuity and uptime of 99.999%

Migrated corporate email from on-site MS Exchange to Office 365 complete with years of archives

Planned and executed new office infrastructure for satellite shipping facility in Nashville, Tennessee, procuring and managing cabling, security camera system, and door access system vendors and installations

Setup all network infrastructure including phone system, workstations, printers, and copiers at new office location, delivering project on-time and on budget with full network functionality and site fully operational

Established free Cloud based Helpdesk (Spiceworks) and supported all companies, sites, applications and devices

Administrator of 40+ servers Windows 2008/2012 Active Directory domain, Cisco switches, routers, firewalls, VPN, Phone Systems, cloud solutions, security appliances. Responsible for cybersecurity and disaster recovery Systems Engineer WELCH ALLYN, INC. Miami, Florida Aug 2008 – June 2013

Principal role in the integration of MDI into Welch Allyn infrastructure including network readdressing, staff domain name change/transfer, hardware refresh project, office relocations, email migrations (Exchange to Lotus)

Managed, and supported 5 Welch Allyn, Inc. Latin America International sites' WAN and LAN networks ensuring 99.999% availability, monitored connectivity, resource availability, performed server maintenance and backups

Analyzed network connectivity post changes at all sites: testing, troubleshooting network connections and resources

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