Network Engineer System Administrator

Alfredo E Guardado March **, ****

Woodbridge VA *2193

Cell 703-***-****

Email **************@*****.***

PROFESSIONAL SUMMARY

•Accomplished System Administrator confident in maintaining reliable and secure Type systems. Highly knowledgeable in related equipment, software and best practices. Results-oriented and driven to improve system operation and meet future demand with callable solutions. Skilled and detail-oriented VMware Administrator with over 6 years of hands-on experience in deploying, configuring, and managing VMware virtualization platforms, including vSphere, ESXi, vCenter, NSX, and Horizon. Proficient in maintaining virtual infrastructures, implementing high availability, backup, and disaster recovery strategies, and automating tasks using Power CLI. Adept at troubleshooting complex virtualization issues, optimizing performance, and ensuring secure and compliant environments. Proven ability to work across cross-functional teams, support hybrid cloud environments, and deliver scalable, resilient infrastructure solutions. Strong background in Windows and Linux server administration, storage integration, and virtual networking.

TECHNICAL SKILLS

Operating Systems: Windows Server.

Virtualization: Citrix Virtual Apps & Desktops, VMware, Hyper-V

Networking: BGP, MPLS, OSPF, VLANs, VPNs, Load Balancing

Scripting & Automation: Power Shell, Bash,

•EXPERIENCE

•Metrostar July 2024 - Present Senior Lead Network Engineer.

•responsible for designing, implementing, managing, and troubleshooting complex network systems. Will Oversee and manage the day-to-day operations of the company's network infrastructure, ensuring optimal performance and availability, Also Troubleshooting and Support: Provide advanced troubleshooting and problem resolution for network issues, ensuring minimal downtime and impact on business operations. Worked closely with other IT teams, vendors, and stakeholders to ensure seamless integration and operation of network systems., also Provide guidance and mentor-ship to junior network engineers, helping to develop their skills and knowledge. with my 12 years of experience in, implementing, and maintaining LAN, WAN.

•VSO 2022- July 2024 Network Engineer

•Net MRI, Red seal, and Forward Network data collectors, collecting data from all NRO assets layer 2 and, layer 3 routers, switches, firewalls. Working with IT Security team to ensure the cloud environments aligns with IT Security compliance. Develops and maintains cloud infrastructure user access roles.

•Worked closely with Tier 1 Cloud Support Techs and the Cloud Services team to remediation issues and fulfill support requirements. Experience with ansible, Power shell automation tool-sets. Knowledge and experience working with Amazon Web Services, Microsoft Azure or Google Compute Engine or equivalent cloud platform experience with application/data migration to AWS.

•PAE Network Engineer from 2020 to 2022

•Managed and administered local area networks (LANs) to support daily operations and facilitate communication across departments. Configured and maintained network equipment, including switches, routers, and wireless access points, to ensure optimal performance and reliability. Monitored network traffic and performance metrics, identifying and addressing potential bottlenecks and security threats. Conducted regular backups and implemented disaster recovery procedures to safeguard critical data and ensure business continuity. Collaborated with vendors and service providers to procure network hardware, software, and services, negotiating contracts and ensuring cost-effective solutions.

I was responsible for managing and maintaining virtualized infrastructure using VMware technologies such as vSphere, ESXi, vCenter, NSX, and Horizon. My role was critical in organizations that rely on server virtualization to optimize resource usage, improve scalability, and ensure high availability. Deployed and Configured Virtual Infrastructure: Install and configure ESXi hosts, VMware vCenter, and VMs virtual machines. Set up resource pools, data stores, and clusters. Diagnose and resolve issues related to VMs, storage, networking, and host connectivity. Used VMware logs and tools like vRealized Operations, ESXCLI, and vSphere Client for troubleshooting.

•Allied Associates Network Engineer 2018 2020

•Assist technical support staff and end-users to manage basic and expedited support for all network related issues Work independently while providing system admin support to multiple software development teams. Work with Team members to develop to brainstorm and implement Ideas to support other groups within the agency. Currently involved in developing and VMware implementation to deploy virtual desktop for Wise dell thin clients.

•Supporting Cisco UCS B-Series Blade and C-Series Rack Servers, the C3260 storage server, and the Cisco Hyper Flex. Design, implement and maintain VMware vSphere infrastructure Monitor, troubleshoot and capacity planning of vSphere environment Proactively identify and perform hardware and software upgrades Evaluate new products and recommends updates and upgrades Provide technical guidance to other VMware administrators.

•Manage and maintain the physical hardware and virtual environment / infrastructure of the Energy & Utilities group using Virtual Center Server v6.0 with a mixture of ESXI 6.5 & ESX 6.7 hosts, consisting of six physical hosts with 250 – 300 virtual machines. Built the v6.5 VCenter Server and moved / migrated hosts over from the previous v6.0 Virtual Center

•Bruin waves Solutions. Sr. System Admin Tier III Support 2012 2018

•Manage and maintain Windows Server and Linux environments, ensuring system up-time and security compliance. Administer Citric Virtual Apps and Desktops, optimizing performance for enterprise users across multiple locations. Implement and troubleshoot network protocols (BGP, MPLS, OSPF) to improve connectivity and network performance. Configure and manage cloud services, including Azure Active Directory, Virtual Machines, and Security Policies. Oversee enterprise wireless network infrastructure, ensuring seamless connectivity and minimal downtime. Automate system tasks using PowerShell and Python to improve efficiency and reduce manual workloads. Conduct security audits and enforce best practices to protect systems from Cyber threats. Maintain and optimize Windows Server infrastructure, including patch management, role-based access control, and performance tuning.

•Lockheed Martin Sr. System Admin 2010 – 2012

•Manage and maintain Windows Server and Linux environments, ensuring system up time and security compliance. Administer Citric Virtual Apps and Desktops, optimizing performance for enterprise users across multiple locations. Implement and troubleshoot network protocols (BGP, MPLS, OSPF) to improve connectivity and network performance. Configure and manage cloud services, including Azure Active Directory, Virtual Machines, and Security Policies. Oversee enterprise wireless network infrastructure, ensuring seamless connectivity and minimal downtime. Automate system tasks using PowerShell and Python to improve efficiency and reduce manual workloads. Conduct security audits and enforce best practices to protect systems from Cyber threats. troubleshooting and diagnostics to identify and resolve connectivity issues, ensuring minimal downtime. Collaborated with cross-functional teams to plan and execute network expansion projects, including hardware upgrades and capacity planning. Implemented security protocols and measures to safeguard network.

•Navy International Program System Admin 2007- 2010

•Supported the Information Assurance implementation for Nippon Accreditation for 2008, and 2009 on all secure, and non-Secure. Ran Gold disk, and Retina to see what’s needed to be re-mediated according to stags. Reviewed exceptions that did not required any remediation for all Navy IPO servers to run properly. Made sure that any remediation and exceptions are well reviewed before making any changes. Remediation is done to each server and according to what applications or programs are being run on each server.

•SOS International System Admin/Engineer 2005 – 2007

•Installed, configured, updated, and maintained Microsoft Windows servers 2000/2003 for SOS International. Performed complex hardware deployments, software upgrades, and significant projects. Perform Tier II-III problem management, isolation, and resolution. Worked with vendors isolate and resolve complex problems. Replaced failed components as necessary. Worked with Microsoft or other vendors as necessary to resolve systems problems. Maintained and upgraded automated scripts for application products to facilitate operational tasks. Monitored system capacity (CPU, memory, ports, disk space, etc.) and took appropriate action to report and correct any issues which were included on a weekly report.

•United States Senate System Engineer 2002 – 2005

•Installed, configured, and maintained windows 2000, 2003 exchange servers, and active directory. Ghost utility to speed up deployments and Repair Drivers from a total system crash including upgrades, and installations. Involved in the planning on upgrading from windows 2000 to windows 2003 active directory, and exchange server. The State Senate had over 200 different domain controllers with over 10,000 users. Supported all members of the State Senate with issues ranging from, exchange server for emails, new installation, upgrades, black barriers.

•U. S Marine Corps Communications. 1994 – 2002

•Gained progressive experience providing network support, system planning, product evaluation, and selection. Provided comprehensive and cost-effective installation, trouble shooting, and maintenance of voice and data communication systems. Implemented TCP/IP, Windows NT 4.0, wins 2000 server. Responsible for troubleshooting all connectivity issues, corrected hardware malfunctions, and resolved software, and network problems throughout the Local area Network and Wide area Network. Configured and maintained firewalls Implemented and configured Storage Area Network Devices Maximized customer operational performance by resolving IT issues Maintained upgrades and monitored all server and internal infrastructure equipment Established network specifications Maintained network performance on need basis.

EDUCATION Certifications

1. CCNP July 2028

2. Security plus June 2028

3. CEH January 2026

5. CompTIA Network January 203

7. AWS Network engineer November 2027

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