Sirimon Puripunpinyo

Dublin, CA  ·  

  • Energetic network engineer with a year of Juniper’s routing products technical support role on premium customers’ critical/major cases, and with 11 years of extensive hand-on experiences in large IP core network in telecommunication industry supporting more than 40 million nationwide customers in Thailand, which included:
    • 6 years of experience on multi-vendor network equipment in configuring, implementing, fault analysis and trouble-shooting IP-MPLS network, L2/L3 VPN services, WLAN, VoIP and NMS.
    • 5 years of experience on multi-vendor network equipment in planning, designing and optimizing IP-MPLS network, L2/L3 VPN services, Firewall, Load Balancer, and NMS.
  • Cost minimizer providing satisfied solutions for customers with minimizing network cost.
  • Collaborative leader who has led and guided teams, mentored individuals and resolved cross-functional team conflicts.
  • Excellent communicator who can build relationships, break down silos, and influence partners.
  • High performance worker with proven record of accomplishment – Fast track promotion, and full-ride scholarship.

Skills

Proficient with designing, operating and trouble-shooting a vast array of IP network, concepts and technologies, including:

  • Multiple hardware platform: Juniper, Cisco, Alcatel-Lucent, Huawei and Tellabs.
  • Juniper: PTX5000, MX960, MX2020,M10i, EX4200, EX4550, QFX5100, Firewall SRX3400.
  • Cisco 2900, 3600 and 3700 series.
  • ALU 7750-SR7, Telco T5C-24GT, F5 Load Balancer
  • Huawei NE40 router, S3700-28TP switch.
  • Network Management Tool: WANDL, Vital, Cacti Cisco, ALU 5620 SAM, Tellabs 8000 IN Manager, and Huawei U2000 NMS.
  • Ixia traffic generator.
  • IS-IS, OSPF, BGP, Route-Reflector
  • MPLS and Traffic Engineering, MP-BGP
  • L2 and L3 VPN services, Inter-provider VPN
  • SONET, SDH, DWDM
  • Unix, VMwere
  • Kiwi Syslog server, RADIUS server
  • Routes control by setting Route policy
  • Flow control, by setting Filter-based Forwarding, ACL
  • IP Multicast(PIM, IGMP)
  • GRE, IPsec, QoS
  • Packet monitor and analyst tool: PRTG, Wireshark, Opnet.

Experience

Technical Support Engineer IV, Customer Focus Technical Support

JUNIPER NETWORKS

  • Provide technical assistance on Juniper’s routing products (MX, PTX, ACX and T series) for premium customers’ critical/major cases with precise analysis and solutions under the SLA.
  • Replicate customer network’s issues in Juniper’s lab for engineering teams to identify a root cause.
  • Collaborate with engineering teams through problem analysis report and validate bug fixes.

August 2019 - Present

Engineer Specialist I/II, Transport and Data Network Planning

Advanced Info Service (AIS)

    IP nationwide network optimization project leader
  • Led the development of IP-MPLS core network carrying 2G/3G/4G data and signaling services of more than 40 million subscribers in the form of L2/L3 VPN services resulting in exponentially growth traffic without any congestion and a better customer experience.
  • Transformed business goals and forecasted consumer usage by leveraging performance tools into action-oriented plans.
  • Identified the best solution that achieves zero down time based on simplicity and laboratory-based simulation results.
  • Successfully managed the project collaborating with 4 cross-function teams and 3 vendors, and delivered it 7 days earlier than the target date.
    Inter-roaming network redesign project leader
  • Designed and implemented a better inter-roaming network by increasing capacity, security and reliability.
  • Developed the inventory process to minimize the overall project cost by leveraging in-house software.

January 2013 - May 2017

Network Engineer Internship, Global Network Operation

University of Maryland University College

Worked in a laboratory to provide solutions for implementing IP-MPLS and IPsec-VPN network.

June 2012 - December 2012

Engineer Specialist I, Transport and Data Network Operation

Advanced Info Service (AIS)

Transport and Data Network Operation Team

  • Team leader responsible for developing and coaching junior team members to improve fault analysis and trouble-shooting skills in IP-MPLS network and L2/L3 VPN service. Created a positive environment by fostering trust and motivating team members to maximize performance.
  • Was a guest instructor to teach on the topics of IP, MPLS and L2/L3 VPN services to 120 engineers from 5 different departments.
  • Conducted network LLD and configuration template to mitigate risks of service integration errors.

April 2010 - January 2011

Senior Network Engineer - Transport and Data Network Operation

Advanced Info Service (AIS)

  • Product evaluation committee responsible for providing detailed comparisons and guidance to support management’s decision on purchasing products such as enterprise Ethernet routers, multi-layer switches, and NMS from Cisco, Juniper, Alcatel-Lucent, Tellabs, and Huawei.
  • Extensive hands-on experiences in launching up the first nationwide IP-MPLS backbone network and NMS, and migrating 2G/3G data services without service degradation.
  • Achieved 99% of solving network issues under service level agreement (SLA) policy.
  • Improved preventive maintenance processes resulting in a substantial reduction of failure cases.

April 2008 - March 2010

Network Engineer

Advanced Info Service (AIS)

Transport and Data Network Operation Team

  • Responsible for implementing the first IP-MPLS network in the company.
  • Successfully migrated the main billing and charging system to the new network without service degradation.
  • Optimized an existing nationwide wireless LAN by redesigning network topology and upgrading equipment capacity to support customers nationwide.
  • Hands-on experience in operation and maintenance Frame-relay, ATM, SDH and SONET.

April 2006 - March 2008

Network Engineer Internship

Siemens Communications

Solution Management

  • Provided QoS knowledge sharing and network solutions to help customer managing heavy usage without investment.

March 2004 - May 2004

Education

University of Maryland (College Park)

Master of Science Telecommunications
Scholarly Paper: Wireless Networking Architecture for Maritime Communication
2011 - 2012

King Mongkut's Institute of Technology Ladkrabang

Bachelor of Engineering, Information Engineering

  • Top 3 of class. Cum laude honors
  • Founder & President of Information Technology Engineering Club (2003-2006).

2002 - 2006

Certifications

Enterprise Routing and Switching, Specialist (JNCIS-ENT)

Juniper Networks
Issued: July 2020
Expires: July 2023

Service Provider Routing and Switching, Professional (JNCIP-SP)

Juniper Networks
Issued: December 2015
Expires: November 2021

Service Provider Routing and Switching, Specialist (JNCIS-SP)

Juniper Networks
Issued: February 2015
Expires: November 2021

Junos, Associate (JNCIA-Junos)

Juniper Networks
Issued: December 2014
Expires: November 2021

Cisco Certified Network Associate – Routing and Switching (CCNA)

Cisco Systems
Issued: December 2009

Certificate of Archievement for Completion of IP Advanced Session Course

Alcatel-Lucent University @ Shanghai, China

Certificate of Archievement for Completion of Building Scalable Cisco Internetworks V2.0 (BSCI)

Cisco Technical Training Center @ Bangkok, Thailand

Certificate of Archievement for Completion of Ethernet over Metro DWDM Application in MW1000, and Management from INC-100MS

NEC Corporation @ Bangkok, Thailand

Awards

  • Advanced Info Service Scholarship (At most 2 people will be qualified each year)
  • The Best Project Award: Information Engineering 2006
  • The Best Presentation Award: Information Engineering 2006
  • Second-class Honours: Information Engineering 2006

Projects

Github

BubbleTea

Suite for Boosting Productivity and Employee Engagement on Slack