David Diaz
Dallas,TX
Summary
Dynamic Network Administrator with extensive experience at Kenco Logistics Service, excelling in VPN management and network security. Proven ability to enhance system performance and resolve complex issues swiftly. Skilled in router configuration and dedicated to self-motivation, ensuring optimal network integrity and user satisfaction.
Overview
24
24
years of professional experience
1
1
Certification
Work History
IT Manager
Encon Systems International
Sunnyvale, Texas
07.2025 - 03.2026
- Oversaw VPNs to deliver secure virtual network access to remote users.
- Configured and maintained routers, switches, firewalls, and wireless networks for optimal performance.
- Implemented security measures including firewalls, encryption, and access control lists to safeguard data.
- Monitored system performance to guarantee service availability for authorized users.
- Managed employee access, security roles, and permissions to uphold network integrity.
- Created detailed documentation of configurations and procedures for network operations.
- Participated in on-call shifts during holidays and weekends to address system emergencies.
- Diagnosed network issues using tools like packet sniffers and protocol analyzers to ensure quick resolution.
- Coordinated vendor relationships to ensure quality service and support.
- Developed training programs for staff on new software applications and tools.
- Streamlined IT processes to improve efficiency and reduce downtime.
- Evaluated emerging technologies for potential integration into existing systems.
- Ensured compliance with industry standards and best practices in IT management.
- Maintained strong knowledge of applicable regulations to guarantee that designs, operations and IT systems met those requirements.
- Performed regular system audits to identify potential risks or vulnerabilities.
- Coordinated disaster recovery plans to minimize downtime during system outages or malfunctions.
- Established security protocols to protect data from unauthorized access or modification.
Network Administrator
KenconLogisticsService(FormerlyShippersWarehouse)
Hutchins, Texas
11.2002 - 06.2025
- Configured and maintained routers, switches, firewalls, and wireless networks for optimal performance.
- Implemented security measures including firewalls, encryption, and access control lists to safeguard data.
- Monitored system performance to guarantee service availability for authorized users.
- Managed employee access, security roles, and permissions to uphold network integrity.
- Created detailed documentation of configurations and procedures for network operations.
- Participated in on-call shifts during holidays and weekends to address
- Diagnosed network issues using tolls like packet sniffers and protocol analyzers to ensure quick resolution.
Senior Network Administrator
Shippers Warehouse (before Kenco acquired)
Dallas, TX
11.2002 - 01.2024
- Provided technical support for users addressing network and computer issues.
- Trained junior staff on best practices for configuring networking devices.
- Implemented technologies including DHCP, DNS, WINS, VPNs, VoIP systems, and VLANs.
- Monitored network performance and troubleshot connectivity issues effectively.
- Tested new server builds prior to production deployment.
- Resolved complex issues related to LAN and WAN infrastructure.
- Configured and maintained routers, switches, firewalls, and wireless access points.
- Analyzed device logs to identify potential security threats in network traffic.
- Conferred with network users about solutions to existing system problems.
- Kept flexible schedule and resolved after-hours and weekend emergencies quickly and accurately.
Warehouse Manager
Shippers Warehouse
Mesquite, Texas
01.2003 - 01.2006
- Consistently met company and department objectives within budget and time constraints.
- Directed investigations to verify and resolve customer or shipper complaints.
- Established or monitored specific supply chain-based performance measurement systems.
- Implemented and planned warehouse safety and security programs and activities.
- Established transportation cost standards and economical shipping practices.
- Implemented bar coding system to identify location and quantities of requested items.
- Monitored product import or export processes to verify compliance with regulatory or legal requirements.
- Implemented on-the-job training activities to cross-train employees on various tasks.
- Planned and implemented energy-saving changes to transportation services by optimizing capabilities.
- Developed and documented standard and emergency operating procedures for receiving and shipping products or materials.
- Restructured warehouse picking locations and reserved slots to achieve maximum employee productivity.
- Handled departmental scheduling to maintain proper staffing for shifts.
- Created and enforced policies and procedures for entire logistics team.
- Prepared inventory for shipment by attaching tags and labels.
- Examined invoices and shipping manifests for conformity to tariff and customs regulations.
- Supervised activities of workers engaged in receiving, storing and shipping products or materials.
Operation Supervisor
Shippers Warehouse
Mesquite, TX
01.2002 - 01.2003
- Evaluated current practices in order to recommend improvements or modifications as needed.
- Directed the hiring process for new staff members including interviewing potential candidates and making final selection decisions.
- Organized training programs for personnel development purposes.
- Provided guidance and support to subordinate staff in order to maximize their individual potentials.
- Ensured adherence to safety protocols throughout all operational processes.
- Collaborated with management team to develop long-term business objectives and plans.
Education
CISCO CCNA
El Centro College
Dallas, TX03-2007
Skills
- Self-Motivation
- Time management
- VPN management
- Network security
- Router configuration
- Proficient in Iron Scales, Microsoft Defender, Sentinal Antivirus, Azure Ad, Azure 365, Azure Teams, Junos System, Cisco Certified, Microsoft
- Firewall management
- System monitoring
- Technical support
- Network troubleshooting
- System administration
- IP addressing and subnetting
- Customer support
- Linux administration
- Client-Server Technology
- Install hardware
Certification
- CCNA Certified
- GoTo Phone Systems
- WMS Systems
- AS400
- Synapse
Accomplishments
- Article written and posted about me and my excellent job skills and work affects by my employer The Shippers Group. Still viewable at https://blog.shipperwarehouse.com/the-shippers-group-celebrates-david-diaz-national-it-professionals-day
Affiliations
- Proud Father in-law to Fallen Solider 1LT Dustin Vincent Killed In Action Iraq 2011
References
Rochelle Lindsay
Executive Account Manager at Encon
Mobile Number: 972-400-5658
John Dennington
Director of Operations at Kenco
254-979-1986
john.dennington@kencogroup.com
Rob Doyle
Group Vice President at Kenco
Email: rob.doyle@kencogroup.com
Mike Beckwith
Chief Financial Officer
beckwith_72@me.com
Mike Mora
General Manager with Kenco
Mobile Number:214-966-3931
Email: mike.mora@kencogroup.com
Morre References Upon Request
Chuck Hovitz
President & CEO of Encon Systems
Encon Systems, Ltd., Inc.
972-226-3400 x223 Main
chovitz@enconsupplies.com
Chris Holmden
Director of IT
Encon Systems, Ltd., Inc.
cholmden@enconsupplies.com
214-450-0276
Timeline
IT Manager
Encon Systems International
07.2025 - 03.2026
Warehouse Manager
Shippers Warehouse
01.2003 - 01.2006
Network Administrator
KenconLogisticsService(FormerlyShippersWarehouse)
11.2002 - 06.2025
Senior Network Administrator
Shippers Warehouse (before Kenco acquired)
11.2002 - 01.2024
Operation Supervisor
Shippers Warehouse
01.2002 - 01.2003
CISCO CCNA
El Centro College