ESTEVAN CASTILLO ALVARADO

Santa Maria, CA

Cell: 209-***-****

http://www.linkedin.com/in/estevan-alvarado

adkb9w@r.postjobfree.com

NETWORK ENGINEER

Experienced Network Administrator with a DoD security clearance and demonstrated history of working in the Information Technology Industry. Skilled in Troubleshooting, Operating Systems, Network Administration, Security, and Military Operations. Strong IT professional with a Bachelor of Science (B.S.) focused on Information Technology Security from Western Governors University.

EDUCATION

Master of Science, Telecomm & Network Engineering, Southern Methodist University, 60% Complete

Bachelor of Science, Information Technology-Security, Western Governors University, Mar 2016

CERTIFICATIONS

CCNP Enterprise, CCNA Security CompTIA Security+, Network+, Linux+, Project+

PROFESSIONAL EXPERIENCE

AT&T Defense Segment, Santa Maria, CA

October 2017 – Present

Network Engineer

Responsible for making product recommendations, selecting and configuring hardware to meet requirements, designing a network solution to meet range needs and the security and performance needs for each site. Directly support all engineering disciplines to include design of an upgraded Communications Subsystem (CMSS) architecture for the Western Range, allocation of CMSS network requirements, test preparation, and test execution of the upgraded CMSS. Support acceptance and performance testing of the solution, and help to configuration and maintain the Network Management System (NMS).

Configure, install, integrate, test and deploy an IPv6 network and related computing environments, including computer and network hardware, network services, systems software, applications software, and all configurations.

Recommend changes to improve systems and network configurations, and determine hardware or software requirements related to such changes.

Perform basic Windows Server 2016 Networking Infrastructure Administration such as (AD, DNS and Network Policy Server-Radius).

Provision Virtual Machines (Windows, Linux) in VMware vSphere 6.5 environment.

Extensive hands on experience with Juniper MX, EX and SRX devices as well as Cisco ASR routers running IOS XE & IOS XR software.

Fundamental MPLS knowledge and configuration.

IPv6 Multicast configuration and troubleshooting (PIMv6 and MLD).

Support Cyber/IA team to ensure network is hardened to meet security needs. Experience hardening Layer 2 and 3 devices.

SNMPv3 Manager Experience for device monitoring using WhatsUP Gold.

Support Program Management Office (PMO) in estimating, reporting, and planning network engineering tasks.

Experience configuring OSPFv3, and BGP routing protocols.

Palo Alto firewall configuration and troubleshooting.

General Dynamics IT, Fort Huachuca, AZ

July 2016 – October 2017

Associate Network Engineer

Provide network support to the U.S. Army Regional Cyber Center - Conus. Install, configure and troubleshoot Top Level Architecture and Joint Regional Security Stack (JRSS) network devices in support of multiple mission areas. Ensure all network devices and configurations are compliant with current DoD/Army regulations (STIGs) and to instruct, train and oversee network associates towards the completion of network tasks. Ensure correctness of all diagrams, device checks and databases. Manage LAN/WAN performance and maintain LAN security.

Responsible for ensuring the function and security of WAN connections to Army networks across CONUS via DISA.

Collaborate with other IT professionals and clients in an effort to implement network hardware and software installations.

Troubleshoot IPsec Site to Site and SSL Remote Access VPNs over public and government networks.

Monitor, report and resolve Trouble Tickets via ITSM Remedy System and ensure quality level work for existing tickets to meet SLA.

Setup and maintain iBGP, eBGP, OSPF, static routes and various next hop redundancy protocols (High Availability and Failover).

Strong knowledge of TCP/IP, IP sub-netting, ACEs, route filtering using route-maps, PBR, GRE tunnels, VLANs, 802.1q trunking, port-channels, DHCP and DNS.

Experience configuring multiple Cisco devices including Nexus 9Ks, ASAs, 3750, 3850, 6500, 7600, ASR and ISR platforms.

Configure and modify ACLs in Palo Alto Panorama, Juniper (ScreenOS) and Cisco ASA firewalls.

Configure VRF, HSRP and VLANs for customer inter-VLAN routing and internet connectivity on Cisco Nexus 9Ks.

Utilize Spectrum, BMC, Netcool, eHealth, Wireshark, tcpdump and NETSCOUT nGenius for network monitoring, automation, and reporting.

United States Air Force, Robins AFB, GA

August 2010 – July 2016

Network Administrator

Performed and supervised airborne equipment operations and maintenance. Initialized, operated, monitored, tested, troubleshot, isolated malfunctions, and repaired radio, audio distribution, switching, cryptologic, satellite communications, radar, computer, and LAN equipment. Monitored displays and indicators for equipment status using technical orders and manuals, test equipment, software diagnostics, waveform observations, or other tests. Adhered to communication security (COMSEC) procedures.

Diagnosed, troubleshot, and resolved software network and systems malfunctions in order to provide 99% system availability.

Extensive knowledge in implementing, maintaining and troubleshooting LAN & WAN, Network security including NAT configurations and VLAN creation.

Performed routine maintenance and repairs to networking devices (routers, switches, firewalls and cabling).

Oversaw the daily performance of computer systems using command line tools and displays to detect errors.

Expertise in configuration of Cisco Catalyst Switches 1900, 2900, Cisco Routers 1800, 2500, 2600, 2800, 3600 and firewalls using Cisco Adaptive Security Device Manager (ASDM) and (CSM).

Provided end-user support, answered inquiries regarding computer and network operations to resolve problems that lead to mission success.

Managed Cisco routers and switches for internal subsystems interconnectivity, Layers 1-3 troubleshooting.

Trained associates on UNIX, Red Hat Linux systems and network operations.

Established and implemented policies, procedures, and standards to ensure conformance with IT systems and organization objectives.

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