Sergio Cossio Email & Phone Number

United States

• Facilitating communication and reporting false negatives & false positives to our labs' teams via Jira.• Supporting SIEM, EDR, SOAR, and TIP integrations that range from CrowdStrike, SentinelOne, Carbon Black, Splunk Phantom, etc.• Assisting enterprise clients in analyzing malicious websites and file types by identifying IOC’s and MITRE ATT&CK Framework.• Utilizing Splunk to search error logs, client IDP information, and account information. • Supporting On-Prem & Cloud software configurations ranging from user permission roles, submission types, SAML 2.0 SSO, and YARA Rules.• Collaborate with our DevOps and legal team to report bugs and potential compliance issues.• Supporting our IR Mailbox that handles automated scanning of emails that may contain malicious QR Codes, URLs, or SPAM.• Assisting in writing reports, knowledge base articles, and technical writing documentation for new onboarding training.• Utilizing the Salesforce platform to manage ticket queues.• Support Windows & Ubuntu on-premise installations.• Demo products to enterprise clients to understand the fundamentals of the platform.• Support 24/7 on call in case of premium enterprise client emergency.

San Diego, California, United States

• Assisting students in becoming Proficient in Linux fundamentals including important distributions, file structure navigation, process management, package installation, password auditing, privilege escalation, user and group management, file permission setting, service management, and user assignment for services.• Helping students improve log analysis, correlation rule design, SIEM vendor evaluation, and Splunk operations including add-on selection, log uploading, SPL query writing, statistical reporting, activity baseline establishment, and alert design for potential attacks.• Supporting introductory sessions on bash scripting constructing compound commands using logical operators (&& and |) and if/else and for statements, teaching file redirects, creating and saving alias commands to the ~/.bashrc file, and editing $PATH variables to include a custom ~/scripts directory.• Assisted students in completing comprehensive training covering cloud service selection, virtual network setup, security implementation, Docker container management, Ansible configuration for VMs, load balancing, redundancy testing, and cloud security protocols via Azure.• Aided in exploring cryptography, encryption and encoding differences, using Open SSL for encryption/decryption, asymmetric encryption, hashing, digital signatures, steganography, SSL certificates, and hash cracking with Hashcat.• Assisted students in pen testing roles, OSINT methods with Google Dorking and Shodan, phishing email detection, advanced Nmap scans, Metasploit automation, privilege escalation, post-exploitation tasks including password cracking, and cybersecurity report writing.

San Diego, California, United States

• Analyze logs, process trees, registry hives, and hidden file extensions for malware.• Utilize Wireshark to capture IP packets to discover Arp cache poisoning traffic.• Extract samples of malicious PowerShell scripts & files to submit for further analysis.• Perform vulnerability scans on customers public facing servers & client workstations.• Assist customers in understanding path detections that occur within their EDR Solution.• Review customer SIEM console detections that consist of network attacks, web & email, and scans.• Utilize internal & external tools to aid in malware analysis.• Eradicate APT’s by removing malicious PowerShell scripts & Registry keys.• Respond to ransomware incident events to help mitigate spread & discover vulnerability exploited.• Interact with our Malware Labs team to distinguish false positives.• Utilize websites like VirusTotal, AbuseIP, Sitecheck, and ssllabs to verify hashes, MAC’s, and websites.• Provide after hours support for premium customers when a security event occurs.

San Diego, California, United States

• Troubleshooting a large range of dynamic environments which include Domain Controllers, Windows OS, macOS, and Linux distros. • Supporting customers, Managed Service Providers (MSP) and resellers.• Provide support in SEIM Implementation and management.• Configuring 2-Factor Authentication via OTP, SMS, SMTP, RDP, Windows logins, account logins.• Governing policies for Firewalls, IDS/IPS Exclusions, HIPS, Device control, Web Control.• Supporting a variety of products ranging from Antivirus, Authentication, SIEM, EDR, and Encryption.• Engineering creative solutions for unique customer complex issues.• Multitasking by supporting two remote sessions simultaneously through phone & chat support.• If required, escalate tickets to level 2 support.• Gather logs and send to our Developer to fix bugs within endpoint & server products.• Responsible for upgrading customers SIEM platforms to meet current up to date versions.• Configuring proxy settings on Endpoints & SIEM to function properly.

Rancho Cucamonga, California, United States

Customer Support • Explain IP networking, IP mapping, port routing & configurations. • Troubleshooting IP conflict issues in customer environments.• Assigning Static and Dynamic IP addresses (DHCP) within customer networks.• Often worked with H264 & H265 video compression to consolidate space for storage.• Safely assigning correct port configurations to prevent ddos and brute force attacks.• Analyzed logs within NVR’s firmware to monitor any illegal intrusion detections (illegal logins).• Updated Firmware on multiple NVR’s and DVR’s to meet current standards.• Supported customers within their dynamic network environments.• Helped configure IP cameras to communicate to the NVR system appropriately.Hardware Technician• Required to create RJ45 cables to connect IP cameras to PoE Switch. • Hardwired CCTV Cameras via RJ45 cables & Coax Cables (running wire).• Installed HDD’s onto Network Video Recorders (NVR) and Digital Video Recorder (DVR).• Submitted the annual division budget request and provided justifications.• Responsible for dismantling IP Cameras and replacing broken hardware.

Rancho Cucamonga, California, United States

• Completed 200+ system reboots for student Chromebooks under 4hr’s.• Successfully imaged 20+ MAC’s and PC’s with proper configurations.• Performed successful PC troubleshooting. (Software/Hardware)• Uninstalled 50+ older PC/MAC models for next generation models. • Installations involved Voip connections, Display Ports, HDMI’s, USB’s, Power Sources, etc.• Responsible for accurate inventory records of all Chromebook serial numbers and designated rooms.• Successfully repaired 100+ Chromebooks (keyboards, lcd screens, power supply, etc). • Successfully backed up 20+ MAC’s onto OneDrive cloud platform.• Promoted to PC Tech Lead for strong work ethic, tech skills, and teamwork.• Exceeded deadline expectations which resulted in extremely satisfied client.• Responsible for sending out time sensitive emails using Microsoft Outlook.

California, United States

Software Support • Managed Active Directory via Domain Controller to add & remove users. • Troubleshooting printers within environment and updated drivers.• Assigning Static and Dynamic IP addresses via Domain Controller (DHCP).• Monitoring & maintaining server health.• Assigning new printers to the domain.• Analyzed logs within NVR’s firmware to monitor any illegal intrusion detections (illegal logins).Hardware Support• Upgrading clients Random Access Memory (RAM) to maximum Gigabytes (GB) storage.• Upgraded clients Hard Disk Drives (HDD) to Solid State Drives (SSD).• Connected new workstations to LAN via switch and RJ45 cable.

Bachelor Of Science - B.S, Information Systems Technology - Cybersecurity

Associate Of Science - As, Business Administration

Associate Of Arts - Aa, Social & Behavioral Sciences