TAKNET Co, provider of Internet services and local/global network connections in the Iranian private sector, Providing diverse solutions for Internet access such as ADSL, Broadband Services, Wireless Services and VoIP are among the most important activities.Perform the necessary research, planning, design, testing, troubleshooting, installation and
 system administration of the Linux servers environment and applications.
in order to be to ensure the stability and availability switches and routers of the network that supports these servers and thousand of customers.
- resolve network issues involving, cisco switch and Firewall configuration, wireless, network load balancing, OSPF routing, MPLS packet switching and etc
- maintain up-to-date technical knowledge of server systems, applications, hardware, operating systems, network hardware, and security best practices
- handle day-to-day maintenance for services, troubleshooting, and performance tuning
- work with other departments and teams to assist and support them with network infrastructure
 - monitors both VM and physical servers through network monitoring systems
- assist help desk as required and be available for weekend rotation
- provides on-location support for various remote operational sites
- troubleshoot all network issues and contact vendors to resolve as needed
- install operating systems, applications, and patches

FARRAR Co ( Gostaresh Ertebatate Noor ), is Providing Network and Connectivity services since 2007. providing services wireless internet with more than 1000+ p2p and p2mp link to end-users such as home users, diplomatic centres, universities, hospitals and etc.- manage multiple tasks with frequent interruptions, occasionally in urgent situations 
- serves as a hardware technician installs, repairs, troubleshoots, modifies computer systems and related hardware to meet the needs of customers 
- maintains strict confidentiality (e.g. passwords and other system security features) for the purpose of ensuring district network security 
- updates tickets with appropriate journal entries of activities, and closes tickets with resolution
- engages in research and in-depth troubleshooting to resolve technical issues 
- elevates complex and high priority problems to the appropriate supp group for resolution
- designing and implementing VLANs and managing and configuring network switches
- managing and configuring network switches
- supporting VoIP system based on Elastix 
- managing network passive activities- managing virtualization based on ESX, proxmox, LXC 
 - install, configure and support 
Linux servers like redhat, ubuntu, FreeBSD 
Linux services like squid, bind, ldap, apache, mysql and etc
block/object storage like Free-NAS, CEPH and etc 
 layer3 hotspot and free-radius 
distance-vector/link-state routing protocol 
 windows servers and service 
- backup data from servers and files 
- monitor Internet consumption by servers, sites and users
- technical control of purchased equipment 
- configure and resolve issues Mpls/vpls network on the wireless backbone

- maintain, monitor, and administer the infrastructure and ensure a 24x7 operational environment including, camera network, switches, routers, wireless access points
- document and communicate on cases from inception to resolution, including root cause analysis
 - ensure the smooth running of the network and services and issues due to the specified SLA
- provide network monitoring, incident response 
- using solar-winds products, OPManager, Cacti and etc 
- open tickets and assign to other teams for resolving the issue
- records all required customer and problem information
- oversee the performance of certain computer systems 
- available for 24x7 on-call rotation as operation might require

HoorOnline Co, internet service provider and Internet communication solutions company, Dialup, ADSL2+, Wireless service provider in Tehran- customer support as full time in work shift and for operation and maintenance
 - training of the customer for proper operating of the systems
- provides answers to clients by identifying problems
- solving DNS, proxy, etc problem on-call support 
- post-warranty Support 
- solving internet phone card for dialup modems

- wireless site-survey and install P2P link
- ability to install long-distance wireless link
- optimize wireless links for improvements
- troubleshoot wireless link, find problems like an electric issue or close visibility

- Install all type of Windows and Linux operation system- Update and patching systems- install and repair all type of RAID HDD in servers