Esmil Contreras Hidalgo

• Manage Network Operations department including staff supervision, Network infrastructure, In addition to designing and implementing cost-effective solutions in terms of network redundancy, telephony, and security procedures
• Lead projects and evaluate the best proposal based on the technical needs of the organization by public bidding and contracting procedures
• Responded to network outages and issues related to circuits, websites, vendors and telecoms.
• Management and configuration of Firewalls from different vendors: Fortigate 500D, FortiGate 400E, Fortigate 200E, Fortigate 80F, Fortigate 400F , Cisco Meraki Mx84, Cisco ASA.
• Management and configuration of L3 Core and design efficient routing protocols techniques to communicate with branches by BGP, OSPF, EIGRP and MPLS.
• Manage Network devices from different vendors Cisco SW-37xx ,Cisco SW-38xx ,Cisco SW-36xx , Cisco SW-45xx and Fortiswitch 148f-PoE

• Management and Configuration of Site-Site VPN (IPSEC),Remote-Site VPN (IPSEC AND SSL web-based) and SDWAN by using different algorithms such as :Source IP , Spillover Latency and Volume .

• Administration and Troubleshooting Office 365, G-Suite, Active Directory, Group Policy, File Shares, and Print Management.
  
• Administration and Troubleshooting of all clients' firewalls: FortiGate, SonicWall, Unifi Gateway.
  
• Remote support to clients regarding reactive and proactive tickets solving issues, which include networking, software, servers, security, VoIP, MS Teams, Skype for Business.

• Working as a Contracted Professor and teaching Operating Systems I and II, Network Fundamentals, and Cybersecurity Fundamentals.
  

• Core maintenance,troubleshooting and administration of the entire network in order to maintain the high availability of the business operations based on the best practices.

• Management and configuration of Telecommunication devices from different vendors : , Fortigate 500D, Fortigate 400E, Fortigate 200E Cisco SW-37xx ,Cisco SW-38xx ,Cisco SW-36xx, PepLink Load Balancers 1850 Series, Cisco Wireless LAN Controller 5500.

• Management and Configuration of Site-Site VPN (IPSEC),Remote-Site VPN (IPSEC AND SSL) and SDWAN by using different algorithms such as :Source IP , Spillover and Latency .
• Manage TACACS + Server and Cisco Identity Service Engine (ISE).
• Management and Configuration PRTG Network Monitoring tool.

• Delivered helpdesk service and support to customers.
• Documented system configuration, mapping and processes.
• Provide remote support to clients in their IPTV Platform
• Integrated database and backup servers into enterprise systems.
• Configure and Manage Asterisk PBX
• Linux OS Servers Administration and troubleshooting
• Management and troubleshooting IKUSI IPTV headend.

• Administration, configuration & statistics reports automation (bandwidth consumption and SLA ) of PRTG Network monitoring tool.
• Troubleshot complex multi-vendor network service provider issues.
  
• Management and configuration of Telecommunication devices from different vendors : Cisco ASA 55xx, Fortigate 600C, Cisco SW-37xx,Cisco SW-35xx,Cisco SW-38xx ,Cisco SW-36xx, Cisco SW-29xx, PepLink Load Balancers 1850 Series, Aruba wireless solution, Cisco Meraki cloud wireless solution and Cisco ISE

• Administration Asterisk PBX version 11 (FreePBX)
• Management Telephony Servers (CentOS)
• Configured and troubleshot VoIP and multi-media distributed systems and platforms.
• Integrated data, voice and video networks for use in multi-site installations.
• Identified issues, analyzed information and provided solutions to problems.
• Validate the proper operation of voice applications ( ACD, Avaya Communicator,Zoiper Biz Softphone)
• Configure Voice over IP Endpoints SIP/H.323 (Deskphones)

• Internal support
• SIP Lines, Centrex and Sip Trunks Provisioning
• Local and International interconnection (SIP/TDM/SS7)
• PBX, ATA and IP Phones programming
• Local Number Portability(LNP)
• VoIP Troubleshooting

• Core maintenance and Administration of VoIP Network Nortel CS2k PBX hosted on Solaris

• Planning and Optimize internal processes related with the telephony services

• Configured hardware, devices and software to set up work stations for employees.
• Maintained support policies and methods of support delivery to provide technically accurate solutions to users.
• Removed malware, ransomware and other threats from laptops and desktop systems.
• Maintained servers and systems to keep networks fully operational during peak periods.