Christian Ruiz
Verified Expert in Engineering
Security Engineer and Developer
Zapopan, Mexico
Toptal member since January 3, 2023
Christian has been a dedicated IT support engineer for two large infrastructure companies within the last 15 years. He has excelled as a security engineer for a company managing digital products and as a high-level administrator for a financial client with access to Windows domain services and data. Christian is a committed, reliable, and dependable professional specializing in Windows services and infrastructure, always working hard to become a critical part of his teams.
Portfolio
Experience
- Active Directory Programming - 15 years
- Windows Server - 15 years
- ITIL V3 Foundation Certified - 12 years
- ServiceNow - 10 years
- Windows PowerShell - 5 years
- Venafi Trust Protection Platform (TPP) - 5 years
- SSL Certificates - 5 years
- DigiCert - 4 years
Availability
Preferred Environment
Windows Server, Active Directory Programming, SSL Certificates
The most amazing...
...accomplishment I've achieved is becoming an onsite leader within six months after being hired as part of the servers support team.
Work Experience
Certificates Management Support Engineer – InfoSecOps Team
Tata Consultancy Services
- Maintained and managed the entire certificate management process, moving from 2,000 application SSL certificates to more than 8,000 in five years without increasing the number of support engineers.
- Continuously supported root and intermediate certificate replacement in Symantec, Digicert, RapidSSL, and PKI for internal, external, and public services, including planning, documentation, and implementation.
- Identified and fixed SSL certificate issues for public sites hosted by different vendors and countries, determining how to issue the signing request, handling DNS registrar processes, and adding and issuing certificates for new domains.
Microsoft Servers World Wide Operations Lead
Tata Consultancy Services
- Provided consultancy services to a banking client, leading the MS servers support team just six months after joining the company, turning it into the third most effective IT support team.
- Obtained Active Directory domain administration rights for high-level troubleshooting, root cause analysis, security, and forensic investigations, using tools like Splunk or SCOM for logs and events analysis.
- Handled ongoing Active Directory monitoring on a global environment to fix incorrect user logon names, invalid characters, incompatible modification dates, last password set dates, and inaccurate group modifications or unused accounts.
- Coordinated vulnerability fixing on a large Windows servers infrastructure by defining implementation plans, installation patches, updates, and scripts for disabling services, ports, or protocols, following change management procedures.
- Designed a remote procedure to solve an ongoing issue requiring manual intervention from on-call engineers to restart HP blade servers. I also oversaw the script implementation to restart servers for critical firmware updates.
Systems and Security Administrator
Technicolor Mexicana
- Designed, documented, and implemented a DR plan for critical IT services on Windows servers, including backup, restoring, and rebuilding of essential services and databases.
- Documented and implemented endpoint security controls for Sarbanes-Oxley audits and conducted digital forensics investigations to track digital media within the IT services and networks.
- Updated and migrated critical services, like the Windows server operating system, SQL databases, web servers, and backups, without downtime, as this is a 24x7 manufacturing company.
- Provided ongoing vulnerability management on servers with Windows and Qualys reports for operating system patching by validating and disabling ports, protocols, and apps and designing procedures to back up and fix vulnerabilities in legacy systems.
- Implemented scripts for Active Directory monitoring to validate user account creation, status, and group memberships, ensuring compliance with user access control audits (UAC) and servers' local groups and memberships.
Experience
Active Directory Domain Setup for Certificate Authority Service Presentation
Education
Bachelor's Degree in Computer Science
CUCEI, University of Guadalajara - Guadalajara, Mexico
Skills
Libraries/APIs
OpenSSL
Tools
VMware, System Center Configuration Manager (SCCM), Splunk
Platforms
Windows Server
Languages
Python
Frameworks
Windows PowerShell
Paradigms
Change Management
Storage
Database Administration (DBA), Databases
Other
Active Directory Programming, Venafi Trust Protection Platform (TPP), SSL Certificates, DigiCert, Domain Name System (DNS), ITIL V3 Foundation Certified, ServiceNow, Group Policy Management, Network Administration, Endpoint Security, Digital Forensics, DNS, DHCP, Commvault, IIS, Patches & Updates, System Center Operations Management (SCOM), FTP Servers, Incident Management, Trust Protection Platform, PKI, Reports, Truststore, Java KeyStore, Virtualization, Computer Science, Programming
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
Share your needs
Choose your talent
Start your risk-free talent trial
Top talent is in high demand.
Start hiring