Sergio G. Email & Phone Number

United States

Bozeman, Montana, Us

Primary responsibility is to safeguard the company's digital assets, data, and network infrastructure. Leveraging a range of advanced cybersecurity tools and technologies.Key Tools and Technologies:• Zscaler ZIA: Ensures secure internet access by inspecting web traffic for threats and enforcing security policies.• Zscaler ZPA: Provides secure, seamless access to internal applications without exposing the network to the internet.• Imperva WAF: Protects web applications from various attacks such as SQL injection, cross-site scripting (XSS), and DDoS.• Netography: Monitors network traffic for anomalies and potential threats, enabling proactive threat detection and response.• Firemon: Automates and manages network security policies across multiple firewalls, ensuring consistent enforcement and compliance.• Palo Alto Firewalls: Implements advanced security features to safeguard the network perimeter.My role as a Cyber Security - Lead Engineer is integral to maintaining the security and integrity of the company's digital environment. By leveraging cutting-edge tools and technologies, I ensure a proactive defense against cyber threats, fostering a secure and resilient operating environment.

Bozeman, Montana, Us

• Engineer assigned to all Cyber Security projects• Ensure the stability, integrity, and operation of the network infrastructure• Assist in the Design and Manage of security solutions• Participate in the planning and execution of security audits• Assisted in deploying and supporting the following: Splunk, Zscaler ZIA/ZPA, Netography, Plixer Scrutinizer, CyberArk• Removal of unused security rules• Remediate over-permissive security rules• Hardening/securing network devices• Knowledge of ServiceNow ticketing system, Solarwinds, ISE • Trained peers on new systems and proceduresGeneral Core Competencies• Zscaler ZPA/ZIA • Scrutinizer • Netography • Firemon • Solarwinds • Python Scripting • ServiceNow ticketing systems • Linux• Network Engineering • Network Security • High Availability Data Center 24/7 Operations • Cisco • ACLs • Switches • Routers • Firewalls • VPN Solutions • OSPF • BGP • ISE • Tacacs • Meraki (CMNO certified) • Load Balancers • F5 (LTM & GTM) • Citrix Netscaler Gateway • Juniper • Staff Training • SAN (storage area network) • WAN (wide area network) • LAN (local area network) • Software & Hardware Installation • Technical Troubleshooting • Helpdesk & Desktop support • Bilingual English/Spanish

San Diego , Ca, Us

• Provide technical expertise and project management for wide & local area networking, security infrastructure, business continuity• Provide operational, technical, and analytical support for network infrastructure• Support a LAN/WAN environment consisting of MPLS and VPN technologies for ~12 Corporate sites and 2 Data Centers• Configure and Administer Cisco switches, routers, firewalls, load balancers, WAP devices• Deploy Meraki Telecommuter solution • Routing protocols including EIGRP and BGP • Vendor management for hardware, software and WAN circuits• Strong skills with:• Routers: Cisco 3800s, 3900s, ASR 1000s,• Firewalls: Cisco ASA 5585• Load Balancers: Netscaler• Switches: Cisco 3750s, 3948s, 4900s, 6500s, Nexus 9ks, 7Ks, 2Ks• Cisco Meraki (CMNO Certified), MX, MS, MR and Z3 Series devices• Cisco ISE/Tacacs/Radius• Network Security• Excellent written, verbal, and presentation skills. Strong organizational and leadership skills. Ability to influence and drive consensus

Mountain View, California, Us

• Assist in the build/maintain/operation of multiple high availability Data Centers• Data centers consist of multiple tier layers, security zones, partner and corporate access. • Data centers contain production, pre-production as well as developer areas/zones• Implement/recommend network solutions according to company’s requirements• Install and configure routers, firewalls, switches and load balancers.• Implement network security/code upgrades/troubleshooting/documentation/• Work closely with customers/vendors/providers to complete/provision projects• Train peers on new procedures and hardware installations• Hardware:Routers: Cisco 3800s, 3900s, 7600s, ASR 1000s, Juniper: MX480sFirewalls: Cisco ASA series and Juniper SRXsF5: 1600s, 3600s, 3900s, 6400s, 8900s, ViprionsSwitches: Cisco 3750s, 3948s, 4900s, 6500s, Nexus 9ks, 7Ks, 5Ks, 2Ks

Various companies (Argent Mortgage, VueTechnology, CoreObjects, others), Southern California • Design/Implement/Recommend network solutions according to customer's requirements • Install and configure Cisco routers, firewalls, switches and VPN solutions. • Design/Implement network security • Work closely with vendors and providers to complete/provision projects • Create documentation; train IT members on new procedures and hardware installations • Hardware:Routers: Cisco's 7200s, 6500s, 3600s and 2600sWAN: T1s, Frame-Relay and DS3sFirewalls: Cisco Pix 500 series and Juniper NetScreen-25 applianceSwitches: Cisco 2900s, 3500s, 3700s, 4000s, 4500s, 6500s and HP Procurve 2650. Media: 10/100/1000 as well as fiber-gig (single mode and multi-mode).VPNs: Cisco 3030 concentrators, Cisco Pix 500 series and Nortel Contivity 1600s/1700sSANs: Hitachi 9960s, EMC Symmetrixs. Brocade switches Server: HP Proliant DL380 G4s/G3s, DL360s, DL320s, Array controllersTape Library: StorageTek L20 Robotic Tape Library and HP External Tape Drives

Us

• Oversee day-to-day 24x7 network operations for Questerra LLC. • It includes 2 Corp Offices (Aliso Viejo, CA and Charlottesville, VA), Staging and a Production environment (Irvine, CA). • The locations involve a total of 40-45 network devices, which include Cisco Routers (7200s, 3640s, 2610s), Cisco 6509s with Multilayer Switch Feature (fiber gig, copper gig and 10/100 blades), Cisco Pixs (525s, 515s), Cisco Switches (4003s, 3500s, 2900s), Nortel Load Balancers (180Es and AD3s) and Nortel Contivity boxes (1600s and 1700s).• Assisted in the design and implementation of Production Data Center, Staging, and Corporate areas from ground zero. Duties included network gear installations, network design and implementations (routers, routing protocols, VPNs, inter-networks, traffic patterns, VLANs, etc.), network security (Pixs, ACLs, VPNs), cabling, testing, validation, racking, and assisting Systems group with server (software and hardware) installations.• Duties include new network designs/configurations/implementations for all sites, Corp/Staging/Production network security, troubleshooting, debugging and solve any problems, which might arise in the WAN, and/or LAN for any site.Oversee the day-to-day 24x7 operations of the SAN (Storage Area Network) for a total of two Hitachi 9960s with capacity of 10TB and 8TB. Design LUN capacity accordingly to requirements. Emulations in place are Open-Ls, Open-Es, Open-9s and Open-3s. Assign LUNs to different ports depending on the Tier server configuration as well as implement LUN security.Configure/Implement/Maintenance Brocade 3800 switches. Add security based on adapters’ WWN and Hitachi ports (zoning). Assist on the implementation and maintenance of Windows 2000 Corp servers with tasks such as server installations, DHCP, DNS, FTP, IIS, Exchange 2000, Active Directory, Domain Policies, account creation (Domain, Exchange, FTP, IIS), Antigen software, backup software and Ghost images.Assist on Helpdesk and Desktop support

El Segundo, Ca, Us

Maintain/build two staging areas. Each which consist of about 24Compaq NT4.0 Servers (1600s, 6400s, 8500Rs, DL380s and DL360s) including 3 complete Clusters and a Catalyst 6500 Cisco switch. Each staging area contains its own domain and has fiber network connectivity. Program VLANs on Cisco switches, build disk arrays, test and validate new hardware, add/remove hardware, create documentation, train operations group members on new procedures and hardware installations. Assist on the programming of Cisco routers, installation and initialization of USPS compliant meter devices. Install EMC’s hardware requirements and provide connectivity from servers to an EMC Symmetrix box (storage network solution) with a mix environment of Qlogic and Emulex adapters. Install/configure/maintain/test the following software: NT 4.0 Domain, MS Cluster Administrator (including virtual servers), MS SQL Server 7.0 Enterprise edition, SQL Fail-over Manager.Maintain/build the International Cluster, which consists of 23 IBM’s Netfinity 4000R servers. These machines belong to the company’s primary domain.

Seattle, Wa, Us

Administer and maintain five Novell Servers (two Novell file servers, one Novell server running backup software, one Novell server with Border Manager serving as a Proxy server). Three Windows NT 4.0 Servers (two Windows NT 4.0 servers, 1 mail server with Microsoft Exchange Server 5.5). One UNIX SGI server, five Baystack 450 switches in a cascade configuration, two Cisco routers. The NT servers include the following services: RAS, WINS, DNS and DHCP. Also maintain the WAN and VPN.Backup and restore servers using Arcserve and Backup Exec. Secure backup tapes at an offsite location. Create network and mail user accounts. Create home directories, printers’ queues, and assign permissions to files and directories, maintain plotters and printers. Support, maintain and upgrade desktops. Create Dial-up connections. Configure and upgrade routers. Create ghost images. Install service packs on Novell and NT servers. Upgrade BIOS for PCs. Upgrade Flash for switches. Assign TCPIP addresses.Install and support the following software applications: MS Office, Outlook, AutoCAD, Photoshop, Internet Explorer, Netscape Communicator, IntelliSync and Palmpilot. During the construction of the new facilities oversaw cabling installation and construction of the server room. Reported progress to main offices in Seattle, WA.

Provide technical support to customers and Distributors (VARs), by providing solutions to installations and usage issues of company flagship CAD systems. The platform coverage includes stand-alone Windows stations as well as networked, and UNIX.Validate customer reported trouble tickets and write defect report to the tracking system for further development resolution.Develop and review technical documentation to incorporate into support materials.Obtained in-depth knowledge and experience of DOS, Windows V3.1, Windows 95, Windows NT, and AIX, HP-UX and IRIX operating systems.Through work, acquired TCP/IP familiarity with IP address, FTP, Telnet, domain name assignment, as well as HLLAPI to VM communication. Have exposure to Novel Netware 3.12 and assist System Administrator on maintaining/installing Fax Server.Quality Assurance of pre-release software. Verify code fixes. Generate materials for supported customer web site. Design software-documentation web pages.Set up internal http server and provide web services to the group as information kiosk center.Assist conferences to support Sales personnel.Assist Jr. members with network settings, software upgrades, and OS settings.

Assist customers with deployment and integration issues regarding PC hardware and CAD/CAM systems (Microcadam, AutoCAD, AutoSurf & AutoCAD Designer).Arrange and give Technical seminars to promote CAD/CAM systems in local business environment and demonstrate the usability of CAD applications to companies with specific needs.Manage and maintain company’s PC hardware and software. Provide internal training on Windows and UNIX operating system, CAD/CAM features and PC hardware maintenance and trouble-shooting.Train application engineers as well as end-users.Implemented the sale of a new products, which in return incremented sales by 70%.