Ivan Serenko Email & Phone Number

Limassol, Cyprus

Drive continuous improvement initiatives through root cause analysis, problem-solving, andimplementing new best practices;Streamline and organize all operational processes to ensure efficient and practical support for end users,focusing on improving user experience, reducing downtime, and promptly addressing their concerns andissues;Lead the Endpoint Infrastructure team, ensuring team development aligns with organizational quality andquantity needs;Plan and allocate resources effectively for successful project delivery and team support;Ensure infrastructure functionality, efficiency, and reliability across a group of companies, including on-premises infrastructure across different locations;Maintain hardware, including purchase, recording, audits, upgrades, repairs, replacements, and deliveryof user devices and other equipment for optimal performance and longevity;Automate provisioning processes and implement an MDM solution with necessary security measures andpolicies for Windows, Mac, Linux, and BYOD devices;Maintain cloud infrastructure; andImplement DevOps practice in teamwork.

Tasks:• Administering users, virtual servers, and local machines in Microsoft Entra ID, including the development and implementation of automation scripts to enhance efficiency.• Managing and optimizing AWS environments to ensure reliability, scalability, and cost-efficiency.• Overseeing the administration of essential corporate systems to ensure they are configured correctly and operate smoothly.• Supporting and maintaining monitoring systems to proactively detect and address potential issues, ensuring the availability and performance of critical infrastructure.• Providing robust support for network infrastructure, addressing connectivity issues, and implementing improvements to maintain high network reliability.Results:• Successfully optimized and supported internal infrastructure, ensuring continuous and reliable operations.• Implemented automation processes that significantly reduced manual workload and improved overall system efficiency.Stack: TCP/IP, VLAN, QoS, ACL, IGMP, LACP, VRRP, VRF, SNMP, OSPF, NAT, DNS, SIP, IPsec, OpenVPN, Ansible, Bash, YAML, Microsoft Entra ID, AWS, Grafana.

St Petersburg City, Russia

Tasks:• Preparation of specifications for network equipment;• Automation of routine processes;• Maintenance of the network infrastructure of customers;• Identification and elimination of faults on networks;• Carrying out activities to ensure network fault tolerance;• Participation in projects to modernize the network infrastructure;• Development and implementation of network security solutions;• Advising customers and clients;• Setting up a Jitsi video conferencing server;• Records management.Results:• Implementation of projects and further support of the customer's infrastructure;• Ensuring the smooth operation of the internal infrastructure.Stack:TCP/IP, VLAN, RSTP, QoS, ACL, IGMP, OSPF, LACP, VRRP, VRF, SNMP, BGP, OSPF, NAT, DNS, SIP, Ipsec, Openvpn, Ansible, Bash, YAML.

St Petersburg City, Russia

Tasks:• Preparation of specifications for Aruba and Cisco equipment;• Participation in large network IT projects;• Maintenance of the network infrastructure of customers;• Preparation of reports on the network infrastructure of customers;• Configuring Citrix NetScaler(Load balancing).Results:• Implementation of projects and further support of the customer's infrastructure.Stack: TCP/IP, VLAN, RSTP, QoS, ACL, IGMP, OSPF, LACP, VRRP, VRF, SNMP, BGP, OSPF, NAT, DNS, SIP, Ipsec, Openvpn.

St Petersburg City, Russia

Tasks:• Connecting new clients;• Installation and configuration of new hardware and software for network equipment (routers, switches, firewalls, wifi equipment), VoIP equipment (Cisco, juniper, Extreme Networks, Huawei, Eltex, HP, Mikrotik, Ubiquiti, D-link, etc. );• Diagnosing and solving problems of subscriber services at the 3rd level of technical support;• Interaction with employees of related departments to resolve emergency situations;• Preparation and implementation of planned work on the network;• Analysis of the IP network, identification of possible emergencies, correction of errors in the configuration of network devices and servers, and development of proposals for network modernization.Results:• Ensuring uninterrupted operation of the IP network (redundancy, security, reduction of recovery time in case of accidents);• Maintaining documentation of the network and the actions taken.Stack: TCP/IP, VLAN, RSTP, QoS, ACL, IGMP, OSPF, LACP, VRRP, VRF, SNMP, BGP, OSPF, NAT, DNS, SIP, Ipsec, Openvpn.

Master'S Degree, 11.04.02 Infocommunication Technologies And Communication Systems

Bachelor'S Degree, 11.03.02 Infocommunication Technologies And Communication Systems