Summary
Overview
Work History
Education
Skills
Certification
Timeline
Generic

Ryan Castleberry

Summary

Knowledgeable Network Engineer with strong foundation in network design and troubleshooting. Proven track record of optimizing network performance and enhancing system reliability in diverse environments. Demonstrated expertise in implementing security protocols and managing complex network infrastructures.

Overview

7
7
years of professional experience
1
1
Certification

Work History

Intermediate Network Engineer

DISA
02.2024 - Current
  • Company Overview: Defense Information Systems Agency
  • We are providing System Support to the Defense Information Systems Agency (DISA) at the DISA facility located in Oklahoma City, Columbus, and Montgomery
  • Work with the DISA mission partners and internal DISA resources in gathering networking requirements, discussing with mission partners the current DISA network architecture, and designing and documenting the requirements into a solution document
  • Utilize various security authentication methods, to include access control lists, single sign on, two-factor authentication, and smart/token card certificate authentication using current network communications topologies and communications infrastructure hardware including switches, routers, load balancers, and firewalls
  • Support the design of routing, switching, VPNs, Terminal Access Controller Access Control System (TACACS)/Remote Authentication Dial-In User Service (RADIUS), Software Defined Networking (SDN) and convergent networks
  • Utilize networking protocols (Transmission Control Protocol/Internet Protocol (TCP/IP), Open Shortest Path First (OSPF), Border Gateway Protocol (BGP), data link Switching (DLSW), and Multiprotocol Label Switching (MPLS)
  • Coordinate and integrate new systems created for DISA/DoD use within the DISA Data Center
  • Provide support in resolving network communication issues as the development and integration of these systems transition from initial standup to initial operating capacity to full operating capacity
  • Utilize network analyzers and troubleshoot/isolate network connectivity issues
  • Support implementation of configuration management process and support the tracking and reporting of those changes
  • Update baseline artifacts to include logical design, as-is drawings for proper network administration of the systems and applications
  • Diagram, document, configure and install layer 2/3 networks
  • Experience with Data Center, VOIP, network and security engineering and design
  • Experience with network and security automation
  • Familiarity with F5 Networks BIG-IP Application Security Manager (ASM) and Local Traffic Manager (LTM)
  • Familiarity with Cisco basic switch configurations and segment routing
  • Familiarity with Juniper Networks SRX series firewalls configurations and management
  • Technical experience in Data Center and Enterprise Routing and Switching
  • In-depth knowledge of implementing and supporting multi-vendor complex Routing and Switching infrastructure
  • Ability to troubleshoot large enterprise networks
  • Ability to explain technical concepts, give clients guidance and vision about the solution
  • Experience with network topology modeling analysis
  • Experience with general networking concepts such as port channels and virtual port channels (vPC), as well as trunk and access ports
  • Support of new technology solutions like Ansible automation and SD-WAN / SD-DC
  • Experience with development of build of materials lists, obtaining quotes, and producing technology refresh plans
  • Ability to work independently and self starter
  • Ability to work multiple, but separate project tasks simultaneously and efficiently
  • Experience supporting network security devices (IPS/IDS, Firewalls, Load balancers) and Encryption devices
  • Proven experience working with Network Management and Analysis tools
  • Experience working with cloud networking
  • Experience with installation of structured cabling
  • Provides secure, reliable, and high performing configurations of the Network environments


COMSEC Custodian/manager

Cyber Transport Systems
04.2018 - Current
  • Company Overview: Alabama Air National Guard
  • Deploys, sustains, troubleshoots, and repairs standard voice, data, and video network infrastructure systems, intrusion prevention and detection systems, and cryptographic equipment
  • Performs, coordinates, integrates, and supervises network design, configuration, operation, defense, restoration, and improvements
  • Analyzes capabilities and performance, identifies problems, and takes corrective action
  • Fabricates, terminates, and interconnects wiring and associated network infrastructure devices
  • Installs, upgrades, replaces, configures, and maintains systems/circuits/IP-based intrusion detection systems that access Military, Federal, and commercial networks
  • Configure Cisco IPsec VPNs for remote users and resolving all VPN related issues
  • Design, implement, and maintain virtual machines using VMware vSphere
  • Led a team that successfully built a network using Cisco switches and routers, supplying Internet, VOIP, and secure services to support 120 unclassified hosts, 28 classified hosts, and 21 administrator-controlled hosts
  • Properly configured VLANS, subnets, port security, IP addresses, and subnet masks using routing and switching protocols such as OSPF, EIGRP, BGP routing protocols
  • Maintain server and network for 150 users in a high tempo deployed environment
  • Maintain accounts and key network infrastructure for a Forward Aviation Detachment
  • Experience in configuring, monitoring, and supporting advanced network switches
  • Knowledge of Microsoft server and Cisco networking devices
  • Excellent analytical, leadership, and organizational skills
  • Connected workstations limited to the office area
  • Installed new software and hardware and set up user accounts and passwords
  • Ensured total security of the network systems, including the internet
  • Installed anti-virus software and fixed network faults
  • Planned and implemented procedures necessary for future development
  • Assisted in maintenance of servers and serve clusters
  • Alabama Air National Guard

Junior Software Engineer/Systems Integrator

Modern Technology Solutions Inc.
08.2022 - 02.2024
  • Support the Integrated Air and Missile Defense Battle Command System’s (IBCS) Government Systems Integration Lab’s network and integration team
  • Built, configured, and managed IBCS product assets
  • Implemented DISA STIG checklists to ensure infrastructure compliance
  • Developed IPv6 multicast routing configurations to eliminate black side from our network topology
  • Built RedHat Linux servers and installed updates of IBCS software, dependencies, and network tools
  • Updated and renovated old system architecture to incorporate new industry technologies
  • Troubleshot any issues that arose in the network to optimize the speed of software deployment and testing
  • Software/systems Integration & Checkout activities
  • Support racking and cabling of servers, routers, switches, and other required equipment
  • Load configurations and firmware Cisco switches and routers
  • Installation and configuration of Linux operating system
  • Installation and configuration of Window Virtual Machines (VM) using ESXI
  • Support troubleshooting and root cause analysis of IBCS IFCN/OIV/Software install scripts
  • Support resolving network/VLAN problems

Junior Network Engineer

DISA
02.2022 - 08.2022
  • Company Overview: Defense Information Systems Agency
  • We are providing System Support to the Defense Information Systems Agency (DISA) at the DISA facility located in Oklahoma City, Columbus, and Montgomery
  • Work with the DISA mission partners and internal DISA resources in gathering networking requirements, discussing with mission partners the current DISA network architecture, and designing and documenting the requirements into a solution document
  • Utilize various security authentication methods, to include access control lists, single sign on, two-factor authentication, and smart/token card certificate authentication using current network communications topologies and communications infrastructure hardware including switches, routers, load balancers, and firewalls
  • Support the design of routing, switching, VPNs, Terminal Access Controller Access Control System (TACACS)/Remote Authentication Dial-In User Service (RADIUS), Software Defined Networking (SDN) and convergent networks
  • Utilize networking protocols (Transmission Control Protocol/Internet Protocol (TCP/IP), Open Shortest Path First (OSPF), Border Gateway Protocol (BGP), data link Switching (DLSW), and Multiprotocol Label Switching (MPLS)
  • Coordinate and integrate new systems created for DISA/DoD use within the DISA Data Center
  • Provide support in resolving network communication issues as the development and integration of these systems transition from initial standup to initial operating capacity to full operating capacity
  • Utilize network analyzers and troubleshoot/isolate network connectivity issues
  • Support implementation of configuration management process and support the tracking and reporting of those changes
  • Update baseline artifacts to include logical design, as-is drawings for proper network administration of the systems and applications
  • Diagram, document, configure and install layer 2/3 networks
  • Defense Information Systems Agency

PC Support

Summit Technologies
02.2021 - 09.2021
  • Provide on-site Tier II break-fix service
  • Perform activities associated with installing, diagnosing, repairing, reimaging, managing of end-user devices and servicing desk side computer-related products and legacy systems
  • Perform regular, special, and integrated system test programs as directed
  • Consult with customer regarding pre- and post-installation problems
  • Utilize and monitor the BMC Remedy ticket tracking system
  • Diagnose incidents and escalate to appropriate Tier III support as needed

IT Computer Specialist/Software Specialist

Modern Technology Solutions Inc.
01.2020 - 02.2021
  • Field Service Representative for the JTDI (Joint Technology Data Integration) program
  • Configure, create, and install JKCS (Joint Knowledge Caching Server) software packages, on mid-tier servers, airframe logbooks, and tablets for the U.S
  • Army
  • Use Splunk to monitor data transfer of units to top-tier servers
  • Troubleshot any installation errors or data transfer problems that might occur while on-site
  • Monitored the network security level, installed new software, performed system back-ups regularly
  • Installed, upgraded, and troubleshot networking software and hardware devices
  • Examined user problems, identified the source, and provided thorough solutions
  • Configured, installed, and maintained workstations, internet connectivity, network cabling, and other networking equipment
  • Integrated and transferred data from mid-tier to top-tier servers from multiple locations
  • Built and installed mid-tier servers to support the customer’s needs
  • Compliant with Department of Defense 8570 (DoDD 8570) Certification – IAT Level II

Help Desk Intermediate

Will Technology
10.2019 - 12.2019
  • Assembled, imaged, and configured workstations, laptops, and servers according to client IT project specifications and details
  • Performed remote and onsite troubleshooting of hardware, software, and networking issues for Fort Rucker USAACE clients
  • Performed level 2 tech support at the desktop level which included installing and upgrading software and hardware, implementing file backups, and configuring systems and applications
  • Monitored organizations central ticketing system to ensure timely resolution of tech support issues with USAACE define SLA
  • Documented all changes to client environments and applied the latest industry “Best Practices”
  • Assisted management with creating new check lists to ensure a consistent result for routine and standard tasks within our proactive IT Service model
  • High attention to detail with focus on strong independent job responsibilities
  • Strong oral and written skills

Education

Bachelor of Science - Information Technology

University of West Alabama
Livingston, AL
07-2024

Skills

  • Network configuration
  • LAN switching technologies
  • Layer-2/3 protocols
  • IP addressing and subnetting
  • DNS implementation
  • Network device monitoring
  • Firewall functionality
  • Network performance monitoring
  • Data center networking
  • Network troubleshooting
  • Firewall configuration expertise
  • Change management

Certification

  • Comptia Security +
  • Microsoft MTA Operating Systems Fundamentals
  • HDI DAST

Timeline

Intermediate Network Engineer

DISA
02.2024 - Current

Junior Software Engineer/Systems Integrator

Modern Technology Solutions Inc.
08.2022 - 02.2024

Junior Network Engineer

DISA
02.2022 - 08.2022

PC Support

Summit Technologies
02.2021 - 09.2021

IT Computer Specialist/Software Specialist

Modern Technology Solutions Inc.
01.2020 - 02.2021

Help Desk Intermediate

Will Technology
10.2019 - 12.2019

COMSEC Custodian/manager

Cyber Transport Systems
04.2018 - Current

Bachelor of Science - Information Technology

University of West Alabama

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Ryan Castleberry