Mihai Tanasescu

TECHNICAL LEAD / CONSULTANT ~ SR. NETWORK / SYSTEMS ENGINEER

*Swiss C Work Permit Holder, Valid until 2016*

About

Solutions-driven technical leader with 10+ years of success designing and transforming network and IT infrastructures to drive productivity, efficiency, and customer satisfaction. Well-qualified with extensive background and advanced technical skills spanning a full range of network/systems/server engineering, administration, and security.

Successful in partnering with clients, stakeholders, management, and teams to evaluate and transform needs into state-of-the-art technical and data management solutions with a compelling ROI.

Organised, take-charge professional with exceptional follow-through abilities, able to plan and oversee projects from conception to successful conclusions.

Cross-functional leadership and technical skills: talent for inspiring superior team performance whilst coordinating initiatives in deadline-driven environments.

TECHNICAL BACKGROUND

OPERATING SYSTEMS

Linux, Unix, FreeBSD, NetBSD, OpenBSD, Windows 2012R2

PROGRAMMING LANGUAGES

Bash/PHP/Perl/Python Scripting Basic level: C/C++, Java

SOFTWARE

Active Directory, Apache, Squid, Nginx, NFS server, NTP, Tomcat, Samba, FTP (Pure-FTPd, ProFTPD, VSFTPD), Quagga, ExaBGP, BIRD, SNMP (net-snmp), Mysql, PostgreSQL, Oracle, NIS, Email servers (Postfix, Qmail, Sendmail, Exim), Iptables, ipfw, ALTQ, HTB, Bind, Cacti, Nagios, Zabbix, Asterisk, Tacacs, Bacula, Rancid, Chora, Clamav, Spamassassin, Spamd, Webhomer, Bazaar, SVN, Puppet, Git, VMWARE, Xen, KVM/Qemu, VirtualBox, Linux HA, HAProxy, igmpproxy

Hardware

Cisco, Juniper, F5 Big IP, ZTE ZXA10-C300M DSLAMs, Vyatta, Huawei

MANAGEMENT & MONITORING PLATFORMS

Nagios/Icinga, Zabbix, Cacti, Telemetry based systems, ELK/Graphite/Grafana

FIREWALLS

Shorewall, iptables, ipfw, fwbuilder, Phion Netfence, Cisco PIX, Cisco ASA, Nokia Checkpoint, Juniper SRX

VPN

OpenVPN, IPSEC, IPIP, GRE, DMVPN (GRE + IPSEC), FlexVPN, MPLS VPNs (EoMPLS, VPLS, L3VPN, EVPN)

NETWORKING/DATA CENTRE

Cisco UCS, Cisco Nexus, EMC Storage (VNX/ISILON), Netflow analysis (Arbor Peakflow), BGP, TR-069, IPTV, Solaris zones, Linux jails, NAS (NexentaStor, FreeNAS), Sun Clusters, Openstack (Mirantis, TripleO), VMWare vCloud

TELEPHONY

ACME SBC, Cirpack Softswitch

CERTIFICATIONS

CCIE R&S #43060, JNCIP-ER, RHCE, Solaris, VMWARE VCP, OSCP (Offensive Security), ITILv3, VCE (Verimatix)

PROFESSIONAL EXPERIENCE

JUNIPER NETWORKS

(2016 – present)

International Networking Company handling a variety of fields such as Networking, Security, Cloud, Automation.

PROFESSIONAL SERVICES CONSULTANT.

Part of the Professional Services team building tailored solutions (Cloud, Automation, Datacenter, Routing) for our customers while also offering on-site support and realizing PoCs for the Sales Team.

Recruited to manage, develop and expand the network infrastructure of Finecom Telecommunications, design business projects for our customers, administer the TV & Voip solutions, provide coaching to 2nd level (Operations) department.

FINECOM TELECOMMUNICATIONS AG

(2012 – 2016)

Regional telecommunications provider; provides cable and fiber internet connectivity, analog, digital, IPTV services, B2B services, VOIP solutions.

SENIOR NETWORK/SYSTEMS ENGINEER:

Recruited to manage, develop and expand the network infrastructure of Finecom Telecommunications, design business projects for our customers, administer the TV & Voip solutions, provide coaching to 2nd level (Operations) department.

Main tasks involve: Leading the design and implementation of a new IPTV project (datacentre technologies, networking, security, load balancing, virtualization – Cisco UCS / VMWare), B2B projects (VPNs, MPLS VPN configuration – CE, PE), System Engineering (Linux installation and configuration of various services, Windows), Security (Juniper Netscreen, Cisco ASA), DTV / IPTV (operating current IPTV platform, spearheading our new IPTV Project in concern with the technical elements), Voip (SBC, Softswitch), FTTH (Ericsson BLM 1500, Huawei MA 5600), Docsis troubleshooting (Cisco UBR 10k CMTS), customizing various in-house solutions (also automation projects), training our 2nd Level Operations Team, acting as deputy Team Leader when the situation demands it.

The role itself is quite challenging and involves both using my varied technical skills and leading the new geo-site redundant IPTV project, coordinating the technical team, tracking the evolution of comprised tasks, managing our suppliers and ensuring deadlines are respected.

Key Successes:

INTERNATIONAL CREDENTIALING ASSOCIATES

(2014 – 2014)

International company recruiting people for part-time projects that involve writing questions for various IT related exams.

KEY SUCCESSES:

Wrote questions/scenarios/drag and drop items for the Cisco CCNP SP exam.

SWISSCOM GROUP: WINGO / ACCELERIS / AIRBITES

(2007-2012)

Major telecommunications provider; provides fixedline and mobile telephony, Internet, digital television, IT services and networking solutions.

SENIOR NETWORK ENGINEER / WINGO, FRIBOURG, SWITZERLAND (2011-2012)

Recruited to customise and expand network infrastructure of Swisscom-owned start-up providing Internet, voice, and IPTV services.

Simultaneously perform systems administration, VoIP troubleshooting, and IPTV development, maximising functionality and security. Provide high level administration and support of Linux server environment encompassing DNS (Bind), DHCP (standalone, failover), Firewalls (Shorewall, FWBuilder), VPNs (OpenVPN), Cacti, Smokeping, Nagios, and Puppet.
Mentored and evaluated team members as I became the team leader of our small networking/systems department which had a total of 3 members.

Key Successes:

Technical Consultant & Team Leader, Acceleris / Airbites (2007 – 2010)

Stepped into role of company’s 1st employee, charged with hiring staff and launching technical operations for Romanian branch of Swisscom partner, Acceleris. Provided IT consultation and technical support for systems/network operations and security under Linux, Solaris, and Windows environments. Migrated and continued Swisscom investment project previously started with Airbites, including design, configuration, and maintenance of local data centre including firewalls and VPNs. Planned and coordinated all Airbites Data Centre projects, aggressively meeting project milestones whilst managing budget, resources, and time constraints. Recruited, trained, and coordinated 4 team members. Provided pre-sales support and delivered technical presentations at industry events.

Key Successes:

ERICSSON GLOBAL SUPPORT CENTRE (GSC), BUCHAREST, ROMANIA

(2010 - 2011)

Largest GSC in Romania, supporting global telecom operators such as Vodafone-NL, Mobistar Belgium, Base Belgium, Yoigo Spain, etc; 1000 employees.

TEAM LEADER, BACK OFFICE IP

Provided decisive leadership and direction for 19 team members across 4 different international projects (Vodafone Netherlands, Mobistar Belgium, Base Belgiu, Yoigo Spain). Resolved escalated issues involving Cisco (ASR, 7600, ASA), F5, Bluecoat, Juniper, and Redback network equipment, Linux and Solaris operating systems, SGSN and GGSN telecom technologies. Organised internal, governance, and change management meetings to ensure compliance with ITIL standards. Permanent monitoring of KPIs, actively identifying motivational factors for employees, training needs and assigning the budget as per priorities of these factors.

Key Successes:

ROMSYS, Bucharest, Romania

(2006 – 2008)

Provides security & networking solutions, SAP & custom software for large corporations and government entities.

Technical Solutions Engineer

Planned and executed all phases of complex projects focused on design and implementation of Cisco-based networking solutions for key clients such as Dacia – Renault Pitesti, Arcelor Mittal (Sidex), and Mechel. Partnered with stakeholders, managers, and teams to define business requirements and specifications for project implementation. Analysed business, system, and security requirements, and customised implementations based upon Linux OS. Analysed and recommended modifications to maximise capacity and ensure a scalable environment while minimising cost. Provided post-implementation training and support. Forged and managed productive client relationships.

Key Successes:

ADDITIONAL EXPERIENCE

UPC LIBERTY GLOBAL

(2006 – 2006)

TECHNICAL SOLUTIONS ENGINEER

MEDIA SAT

(2005 – 2006)

NETWORK & SYSTEM ADMINISTRATOR

DURAS

(2003 – 2005)

NETWORK & SYSTEM ADMINISTRATOR

Co-founded successful start-up; positioned for profitable sale in 2005 after reaching 2000 client margin.

FACULTY OF MATHEMATICS & COMPUTER SCIENCE AT UNIVERSITY OF BUCHAREST

(2003 – 2004)

NETWORK & SYSTEM ADMINISTRATOR / VOLUNTEER POSITION

EDUCATION & CREDENTIALS

MASTER OF SCIENCE, COMPUTER AIDED BUSINESS & PROJECT MANAGEMENT
(2007 - 2009)

University of Economical Studies, Faculty of Cybernetics, Statistics & Computer Science, Romania

BACHELOR OF ARTS, COMPUTER SCIENCE / NETWORKING & PROGRAMMING
(2002 - 2007)

University of Bucharest, Faculty of Mathematics & Computer Science, Romania'

SOLARIS COURSES

Solaris Administration I, Solaris Admin II, Solaris Clustering, Legato Networker Backup

SIX SIGMA COURSE

Ericsson ∙ Project Management Course, Project Management Institute

ORACLE COURSES

Database Administration I & II, Oracle RAC - Real Application Clusters'

CERTIFICATIONS

LANGUAGE SKILLS

Mihai Tanasescu

TECHNICAL LEAD / CONSULTANT ~ SR. NETWORK / SYSTEMS ENGINEER

About

Solutions-driven technical leader with 10+ years of success designing and transforming network and IT infrastructures to drive productivity, efficiency, and customer satisfaction. Well-qualified with extensive background and advanced technical skills spanning a full range of network/systems/server engineering, administration, and security.

Successful in partnering with clients, stakeholders, management, and teams to evaluate and transform needs into state-of-the-art technical and data management solutions with a compelling ROI.

Organised, take-charge professional with exceptional follow-through abilities, able to plan and oversee projects from conception to successful conclusions.

Cross-functional leadership and technical skills: talent for inspiring superior team performance whilst coordinating initiatives in deadline-driven environments.

TECHNICAL BACKGROUND

OPERATING SYSTEMS

Linux, Unix, FreeBSD, NetBSD, OpenBSD, Windows 2012R2

PROGRAMMING LANGUAGES

Bash/PHP/Perl/Python Scripting Basic level: C/C++, Java

SOFTWARE

Active Directory, Apache, Squid, Nginx, NFS server, NTP, Tomcat, Samba, FTP (Pure-FTPd, ProFTPD, VSFTPD), Quagga, ExaBGP, BIRD, SNMP (net-snmp), Mysql, PostgreSQL, Oracle, NIS, Email servers (Postfix, Qmail, Sendmail, Exim), Iptables, ipfw, ALTQ, HTB, Bind, Cacti, Nagios, Zabbix, Asterisk, Tacacs, Bacula, Rancid, Chora, Clamav, Spamassassin, Spamd, Webhomer, Bazaar, SVN, Puppet, Git, VMWARE, Xen, KVM/Qemu, VirtualBox, Linux HA, HAProxy, igmpproxy

Hardware

Cisco, Juniper, F5 Big IP, ZTE ZXA10-C300M DSLAMs, Vyatta, Huawei

MANAGEMENT & MONITORING PLATFORMS

Nagios/Icinga, Zabbix, Cacti, Telemetry based systems, ELK/Graphite/Grafana

FIREWALLS

Shorewall, iptables, ipfw, fwbuilder, Phion Netfence, Cisco PIX, Cisco ASA, Nokia Checkpoint, Juniper SRX

VPN

OpenVPN, IPSEC, IPIP, GRE, DMVPN (GRE + IPSEC), FlexVPN, MPLS VPNs (EoMPLS, VPLS, L3VPN, EVPN)

NETWORKING/DATA CENTRE

Cisco UCS, Cisco Nexus, EMC Storage (VNX/ISILON), Netflow analysis (Arbor Peakflow), BGP, TR-069, IPTV, Solaris zones, Linux jails, NAS (NexentaStor, FreeNAS), Sun Clusters, Openstack (Mirantis, TripleO), VMWare vCloud

TELEPHONY

ACME SBC, Cirpack Softswitch

CERTIFICATIONS

CCIE R&S #43060, JNCIP-ER, RHCE, Solaris, VMWARE VCP, OSCP (Offensive Security), ITILv3, VCE (Verimatix)

PROFESSIONAL EXPERIENCE

JUNIPER NETWORKS
(2016 – present)

International Networking Company handling a variety of fields such as Networking, Security, Cloud, Automation.

PROFESSIONAL SERVICES CONSULTANT.

Part of the Professional Services team building tailored solutions (Cloud, Automation, Datacenter, Routing) for our customers while also offering on-site support and realizing PoCs for the Sales Team.

test2

test3

Key Successes:

test 4 key succ

FINECOM TELECOMMUNICATIONS AG
(2012 – 2016)

Regional telecommunications provider; provides cable and fiber internet connectivity, analog, digital, IPTV services, B2B services, VOIP solutions.

SENIOR NETWORK/SYSTEMS ENGINEER:

Recruited to manage, develop and expand the network infrastructure of Finecom Telecommunications, design business projects for our customers, administer the TV & Voip solutions, provide coaching to 2nd level (Operations) department.

Main tasks involve: Leading the design and implementation of a new IPTV project (datacentre technologies, networking, security, load balancing, virtualization – Cisco UCS / VMWare), B2B projects (VPNs, MPLS VPN configuration – CE, PE), System Engineering (Linux installation and configuration of various services, Windows), Security (Juniper Netscreen, Cisco ASA), DTV / IPTV (operating current IPTV platform, spearheading our new IPTV Project in concern with the technical elements), Voip (SBC, Softswitch), FTTH (Ericsson BLM 1500, Huawei MA 5600), Docsis troubleshooting (Cisco UBR 10k CMTS), customizing various in-house solutions (also automation projects), training our 2nd Level Operations Team, acting as deputy Team Leader when the situation demands it.

The role itself is quite challenging and involves both using my varied technical skills and leading the new geo-site redundant IPTV project, coordinating the technical team, tracking the evolution of comprised tasks, managing our suppliers and ensuring deadlines are respected.

Key Successes:

  • Led implementation of new IPTV project which included configuration of the following: Cisco UCS 5108, Cisco UCS 6200, Nexus 5672UP, VMWare, Cisco CSR1000V, ASAv, EMC Storage ISILON and VNX, Envivio IPTV Encoders, Verimatrix, Broadpeak content caching (BkS100, BkS300) for Live and OTT traffic, Agama monitoring, F5 Virtual Load Balancer, Cisco EdgeQAMs, Cisco DCM, Verimatrix.

INTERNATIONAL CREDENTIALING ASSOCIATES
(2014 – 2014)

International company recruiting people for part-time projects that involve writing questions for various IT related exams.

KEY SUCCESSES:

Wrote questions/scenarios/drag and drop items for the Cisco CCNP SP exam.

SWISSCOM GROUP: WINGO / ACCELERIS / AIRBITES
(2007-2012)

Major telecommunications provider; provides fixedline and mobile telephony, Internet, digital television, IT services and networking solutions.

SENIOR NETWORK ENGINEER / WINGO, FRIBOURG, SWITZERLAND (2011-2012)

Recruited to customise and expand network infrastructure of Swisscom-owned start-up providing Internet, voice, and IPTV services.

Simultaneously perform systems administration, VoIP troubleshooting, and IPTV development, maximising functionality and security. Provide high level administration and support of Linux server environment encompassing DNS (Bind), DHCP (standalone, failover), Firewalls (Shorewall, FWBuilder), VPNs (OpenVPN), Cacti, Smokeping, Nagios, and Puppet.
Mentored and evaluated team members as I became the team leader of our small networking/systems department which had a total of 3 members.

Key Successes:

  • Spearheaded large-scale project to expand data centre to accommodate business growth into IPTV market; completed project on time and with zero service/business disruption.
  • Led successful architecture and implementation of Wingo network including dual-homing, BGP, VRRP enabled routers, NAT444 and lawful intercept.
  • Customised and enhanced of CPE Firmware for ADSL/FXS-enabled gateways, significantly improving functionality and customer satisfaction.
  • Debugged and tested FXS / telephone interface in user equipment, troubleshooting and resolving critical performance issues such interference from poor grounding or incompatible telephone brands/filters.
  • Configured and deployed ZTE ZXA10-C300M DSLAMs and Vyatta-based routers.
  • Conducted in-depth analysis and testing, and built business case for integrating TR-069 into setup for CPEs and STBs.
  • Developed new CPE firmware and utilities for debugging, significantly accelerating troubleshooting and resolution of VoIP/Internet issues.

Technical Consultant & Team Leader, Acceleris / Airbites (2007 – 2010)

Stepped into role of company’s 1st employee, charged with hiring staff and launching technical operations for Romanian branch of Swisscom partner, Acceleris. Provided IT consultation and technical s...

Key Successes:

  • Credited with successfully building new data centre from ground up despite limited prior experience with the primary operating system, Sun Solaris.
  • Orchestrated seamless relocation of data centre equipment, hardware and software 2 times; achieved implementation deliverables with minimal service or business disruption.
  • Key contributor to architecture of entire international/metropolitan/access network from the ground up in less than 1 month. Coordinated all technical teams, vendor negotiations, and implementation of lawful intercept.
  • Delivered highly scalable bandwidth limiting solutions with traffic differentiation (local/metropolitan vs extern/international) by using HTB machines, VRFs, and route leaking.
  • Completed both low and high-level configuration of Cisco equipment (Cisco 2950, 2960, Cisco 3845, Cisco 3750 / Cisco 3560, Cisco 7200, Cisco 7600): BGP, OSPF, QOS, MPLS, EoMPLS, MPLS VPNs, PVSTP, MST.
  • Designed and configured Inter-Office DMVPN project, linking multiple locations across Europe with local Datacenter in Bucharest, Romania.
  • Deployed Sun servers X86 and SPARC with Solaris OS, ZFS and zones and IPF filtering (Sun T1000, T2000, X4100, X4150, X2100, T5120).
  • Configured and maintained state-of-the-art storage and backup solutions including Tape Library SL-500, SAN Switches (Brocade), Storage arrays (Storate Tek 6140/6130), NAS (5320 appliance) and Sun StorEdge Enterprise Backup.
  • Virtualised machines for 3rd party clients utilizing Xen, VirtualBox and VMWare.
  • Installed, configured, and managted Windows 2003/2008 AD, Web servers (Apache, Apache Tomcat), Proxy (Squid, web filtering), DNS (Bind), Firewalls (PFSense, Phion Netfence), FTP server (Pure-FTPD, ProFTPD), and Mail server (Postfix).

ERICSSON GLOBAL SUPPORT CENTRE (GSC), BUCHAREST, ROMANIA
(2010 - 2011)

Largest GSC in Romania, supporting global telecom operators such as Vodafone-NL, Mobistar Belgium, Base Belgium, Yoigo Spain, etc; 1000 employees.

TEAM LEADER, BACK OFFICE IP

Provided decisive leadership and direction for 19 team members across 4 different international projects (Vodafone Netherlands, Mobistar Belgium, Base Belgiu, Yoigo Spain). Resolved escalated issues...

Key Successes:

  • Conducted root cause incident investigations and performance/trend analyses of managed networks to accelerate problem resolution whilst increasing uptime, reliability, and security.
  • Mentored staff and colleagues, employing conflict resolution strategies to maximise team productivity.
  • Identified and cost-effectively met employee training needs within established budget parameters.

ROMSYS, Bucharest, Romania
(2006 – 2008)

Provides security & networking solutions, SAP & custom software for large corporations and government entities.

Technical Solutions Engineer

Planned and executed all phases of complex projects focused on design and implementation of Cisco-based networking solutions for key clients such as Dacia – Renault Pitesti, Arcelor Mittal (Sidex), ...

Key Successes:

  • Customised and deployed ISDN-based failover system for National Ambulance of Romania; created custom scripts (bash, expect) for optimising and accelerating software upgrades, network changes, and redundancy switchovers.
  • Implemented network-wide QOS in 2 days for Mittal Steel.
  • Provided 1st level support for Call Manager and VoIP solution at Dacia-Renault, a car manufacturer.
  • Praised for customer service mentality and the ability to clarify issues and set user expectations.
  • Built productive relationships with both colleagues and customers, earning reputation as ‘go-to’ resource for high-risk projects and technical issues.

ADDITIONAL EXPERIENCE

UPC LIBERTY GLOBAL
(2006 – 2006)

TECHNICAL SOLUTIONS ENGINEER

MEDIA SAT
(2005 – 2006)

NETWORK & SYSTEM ADMINISTRATOR

DURAS
(2003 – 2005)

Co-founded successful start-up; positioned for profitable sale in 2005 after reaching 2000 client margin.

NETWORK & SYSTEM ADMINISTRATOR

FACULTY OF MATHEMATICS & COMPUTER SCIENCE AT UNIVERSITY OF BUCHAREST
(2003 – 2004)

NETWORK & SYSTEM ADMINISTRATOR / VOLUNTEER POSITION

EDUCATION & CREDENTIALS

MASTER OF SCIENCE, COMPUTER AIDED BUSINESS & PROJECT MANAGEMENT
(2007 - 2009)

University of Economical Studies, Faculty of Cybernetics, Statistics & Computer Science, Romania

BACHELOR OF ARTS, COMPUTER SCIENCE / NETWORKING & PROGRAMMING
(2002 - 2007)

University of Bucharest, Faculty of Mathematics & Computer Science, Romania'

SOLARIS COURSES

Solaris Administration I, Solaris Admin II, Solaris Clustering, Legato Networker Backup

SIX SIGMA COURSE

Ericsson ∙ Project Management Course, Project Management Institute

ORACLE COURSES

Database Administration I & II, Oracle RAC - Real Application Clusters'

CERTIFICATIONS

  • Redhat Openstack
  • Cisco Certified Internetworking Expert
  • VMWARE VCP 6.5
  • Juniper JNCIP-ER
  • Redhat Certified Engineer (RHCE)
  • Offensive Security (OSCP)
  • VCE (Verimatrix Certified Engineer)
  • Sun Certified System Administrator, Solaris 11
  • IELTS English Language Accreditation
  • ITIL v3 Foundation

LANGUAGE SKILLS

  • Romanian (Native)
  • English (Fluent)
  • French (Medium)
  • German (Medium)
  • Italian (Basic)

Blog

Come visit my blog to see a few of the things I work on.

Intra pe blogul meu pentru a vedea o parte din tehnologiile cu care lucrez.

Venez visiter mon blog pour voir quelques-unes des choses sur lesquelles je travaille.

Besuchen Sie meinen Blog, um ein paar der Dinge, an denen ich arbeite, zu sehen.

GO TO BLOG GO TO BLOG

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