Fabian Ontiveros
IT Security Analyst II
Phoenix,US
Summary
Experienced and highly capable IT Security Analyst II with over 3 years in enterprise SOC environments and 17+ years in technical support. Demonstrated success in leading Tier 2 operations, mentoring analysts, and driving improvements in threat detection, incident response, and tool optimization. Expert in managing and integrating security platforms including CrowdStrike, LogRhythm, Microsoft Sentinel, Cortex SOAR, and Palo Alto Firewalls. Skilled in tuning detection use cases, validating high-priority incidents, and ensuring timely response to security events. Known for delivering consistent results in fast-paced environments and contributing to strategic security initiatives.
Overview
11
11
years of professional experience
6
6
years of post-secondary education
2
2
Languages
Work History
IT Security Analyst II
FIS Management Services LLC
Phoenix, AZ
02.2024 - Current
- Serve as Tier 2 lead for SOC operations, guiding Tier 1 analysts during investigations and providing mentorship on complex security scenarios.
- Review and validate high and critical priority cases marked as false positives, ensuring accuracy and improving triage quality.
- Perform threat detection, incident response, and forensic analysis using tools such as CrowdStrike, LogRhythm, Google SecOps Siemplify, Cortex SOAR, and Microsoft 365 Defender.
- Act as SME for SOC tools including Microsoft Azure Sentinel, Microsoft Entra, Intune, Exchange, Netskope, iBoss, and Palo Alto Firewalls, supporting tool optimization and analyst enablement.
- Identify noisy use cases and recommend tuning strategies to reduce alert fatigue and improve signal-to-noise ratio.
- Proactively monitor SOC queues to ensure timely response to priority tickets, including client-reported incidents and Siemplify cases.
- Analyze investigation trends to propose new use cases and detection logic, enhancing SOC coverage and threat visibility.
- Escalate operational challenges and process gaps to management, contributing to continuous improvement and strategic planning.
- Created customized reports for stakeholders detailing key metrics related to IT security performance, fostering transparency and accountability within the organization.
- Identified areas requiring improvement through detailed analysis of past incidents, preventing future occurrences through targeted remediation efforts.
IT Security Analyst I
FIS Management Services LLC
Phoenix, AZ
08.2020 - 02.2024
- Provided information security support for over 100+ Banks using different security products for varied purposes.
- Responsible for end to end security, ensuring that confidentiality, integrity and availability of all Banks authority data is not breached, infected or compromised in anyway by outside malicious users.
- Established company-wide security best practices and protocols to mitigate risk of data breach.
- Completed vulnerability scans to identify at-risk systems and remediate issues.
- Services monitored will include but are not limited to SIEM, IDS/IPS, Firewall, Web Application, Data Loss Prevention.
- Collaborated with cross-functional teams to address complex security incidents, minimizing potential damage.
- Reduced potential security risks by proactively monitoring systems for suspicious activity and taking appropriate action.
Security Service Desk
FIS Management Service LLC
Phoenix, AZ
09.2018 - 08.2020
- Responsible for being first point of contact for incident related to security threats and assist Gateway Protection, Firewall and Security Operations teams as need it.
- Entered service tickets into incident tracking system to facilitate faster problem identification and resolution.
- Engaged in user support interactions via telephone, chat and email platforms.
- Removed malware, ransomware and other threats from laptops and desktop systems.
- Patched software and installed new versions to eliminate security problems and protect data.
- Active Directory Administration; Creation/Modification of users Security groups for web access and manage Cisco web security filters and policies.
Technical Support Representative Sr.
FIS Management Services LLC
Phoenix, Arizona
06.2018 - 09.2018
- Provide day-to-day technical support to banks employees for network infrastructure, internal desktops and thin clients, servers and software.
- Maintained servers and systems to keep networks fully operational during peak periods.
- Assist bank employees in analyzing email for threats, scams and phishing attempts.
- Ensure data privacy by following all work and industry policies in resetting and unlocking remote user accounts.
- Classify Email tickets and assigned to appropriate teams for follow up.
Technical Support Analyst
G/O Digital A TEGNA Company
Phoenix, AZ
09.2015 - 09.2018
- SQL server reporting services (SSRS) manage e-schedule SQL reports.
- Active Directory Administration; Creation/Modification of users, Distribution lists, Security groups, Attribute modifications.
- Support Hardware, resolve issues related to PC's and peripheral hardware, printers, scanners, cell phones and Avaya VOIP.
- Support Software installation, maintenance, and troubleshooting of Microsoft office365 applications, Windows 7/10, Mac OS, McAfee ePO and McAfee Antivirus, Salesforce applications, and other miscellaneous software.
- Troubleshoot network and wireless connectivity problems such as authentication, connection speed, connection quality, throughput and loss of synchronization.
Desktop Support Specialist
Insight Global: Contractor At The Arizona Republic
Phoenix, AZ
09.2014 - 09.2015
- Set up equipment for employee use, performing proper installation of cables, operating systems and appropriate software.
- Documented problem and solution thoroughly; provided timely status of updates for resolved and newly assigned tickets.
- Service and Maintain laptops and Desktops systems, including inspect, clean, test, run scandisk & update Windows OS 7, BIOS Firmware, hardware drivers, antiviral programs to maintain performance and security.
- Deploy new computer systems for new remote or local users.
- Configured software and VPN troubleshooting, LAN, DNS, DHCP settings and browsers internet settings to allow accessibility to online products.
Education
Completed Coursework - Information Technology: Network And Cyber Security
MCC - SMC Colleges
Phoenix, AZ 01.2018 - 05.2019
Diploma - Computer Repair And Network Essentials
East Valley Institute of Technology
Mesa, AZ 08.1998 - 05.1999
High School Diploma -
Marcos De Niza High School
Tempe, AZ 08.1995 - 05.1999
Skills
Cisco ASA firewalls, Firepower
Critical Thinking
Active Directory Administration
JIRA and ServiceNow
Cisco VPN, LANDesk, ASA Firewalls
Firemon
Trend Micro CM
LogRhythm
McAfee Antivirus and ePO
Cylance
Crowdstrike
Cortex SOAR
NetSkope
Google SecOps Siemplify
PaloAlto Firewalls
Remediation Assessment
Ibos
Anomali ThreatStream
Red Canary/Carbon Black
Microsoft Azure
Timeline
IT Security Analyst II
FIS Management Services LLC
02.2024 - Current
IT Security Analyst I
FIS Management Services LLC
08.2020 - 02.2024
Security Service Desk
FIS Management Service LLC
09.2018 - 08.2020
Technical Support Representative Sr.
FIS Management Services LLC
06.2018 - 09.2018
Completed Coursework - Information Technology: Network And Cyber Security
MCC - SMC Colleges
01.2018 - 05.2019
Technical Support Analyst
G/O Digital A TEGNA Company
09.2015 - 09.2018
Desktop Support Specialist
Insight Global: Contractor At The Arizona Republic
09.2014 - 09.2015
Diploma - Computer Repair And Network Essentials
East Valley Institute of Technology
08.1998 - 05.1999
High School Diploma -
Marcos De Niza High School
08.1995 - 05.1999
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