Sean Li

**** ******** ***, ******** **, L*J *N*

416-***-****, addxht@r.postjobfree.com

Objective

Senior System Operation/ Network and Security Administration Highlight of Qualifications

• 10+ years extensive experience in IT field

• Superior knowledge of wired/wireless networks, routers and network topology

• Diversified skills in network deployment, administration, systems engineering, network Security, monitoring and troubleshooting

• Excellent statistic and analytical skills in network, system and security

• Proficiency with all of popular Network Application Services (especially in Web, CDN, P2P)

• Experience in information security products and technologies (especially in defense/mitigation DDoS attack)

• Experience in virtualization and cloud technologies

• Experience in ITIL service management

• Dynamic and result oriented leader with outstanding communication, consulting and team building skills

Technical Skills

OS and Application Network and Security

Operating Systems: MS-Windows, SUN Solaris, RedHat Linux, FreeBSD, Novel Netware, CentOS etc.

Network Application Services: BIND and MS DNS, MS

Active Directory, MS-IIS /Apache and Squid, Sendmail

/MS Exchange / IMAIL, MS-FTP /WS FTP /ServU /FTPd, MS-SQL /MySQL /Oracle, NFS/SAMBA,iSCSI

Management and Monitoring: Cisco NetFlows, Ipswitch WhatsUp, MRTG, Cacti, Nagios/Icinga, NTOP, OSSIM,

Ganglia, Kibana, Grafana, ELK

Internet protocols: SMTP, POP3, HTTP, FTP, SNMP, RIP, OSPF, BGP, VLAN, VPN, WebVPN, IPSec, SSH, QoS,

NAT, DHCP, xDSL, L2TP, PPTP, PPPoE, ISDN, Frame

Relay, 802.11x Wireless

Bigdata: Hadoop

IOT: Kaa

Network Switch/Router: Cisco, Bay

Networks H3C

Content Switch: F5 BIGIP Switch, Array

Networks TMX Content Switch, Cisco

Content Services Switch, Cisco LoadDirector

Network Security: Microsoft ISA, Linux

Firewall, CheckPiont, McAfee Sniffer Pro,

Ethereal, Wireshark, Pfsense, Snort, Ntop,

IPSec VPN, OpenVPN; Cisco PIX Firewall,

NetScreen Firewall, Fortinet Firewall,

McAfee IntruShield IPS, Tipping Point IPS,

Radware Defense Pro IPS,

NSFocus Collapsar IPS and IDS Barracuda

Global Traffic Manager: F5 3-DNS

Content Distribution: NetApp NetCache

Virtualization ITSM

VMWare, Amazon AWS, Docker OTRS GLPI, OCS, FUSION

Professional Experience

Senior System and Network Administrator 2010-2019

OSSSI Co., Ltd (Beijing, China)

• Participates in the assessment of external and internal technology capabilities required to achieve desired competitive positioning.

• Maintains currency on new technologies and platforms and provides direction on what emerging technologies should be assimilated, integrated and introduced to ensure IT capabilities respond to the needs of the enterprise's business strategy.

• Provides oversight as well as design, configure and deployment of company data networks, assess near and long-term network capacity needs and direction.

• Assures the reliability, stability and availability of all IT infrastructure components.

• Manage and maintenance infrastructure security.

• Participating in wireless deployments including network preparation, site surveying and performance tuning.

• Troubleshooting wired and wireless network issues, assess and action vulnerability scans, penetration tests, threat risk assessments.

• Assists in the recommendation of strategies for data center and infrastructure management from business continuity, disaster recovery, monitoring, storage, security.

• Monitor, analyze and tune the IT system to achieve optimal performance levels.

• Provide detailed procedures and instructions, and assist the Support Team with security event investigation and resolution.

System and Network Administrator 2006-2009

ALT Software Co., Ltd (Toronto, Canada)

• Managed and supported of whole IT system and operational services.

• Developed system operation SOP documents, security policies and procedures.

• Assisting in the management and responsibility for company data ensuring that all backup and restore procedures are adhered to and effective.

• Analyze and maintain wired/wireless voice and data communication network

• Overseeing the uninterrupted monitoring of the IT infrastructure, making sure all systems are capable of handling their given workloads and have not been compromised by any external influences.

• Ensuring that any planned changes to the IT infrastructure are efficient, viable and documented in line with Change Control methodologies

• Ensuring security on all systems and legal requirements are met.

• Maximize network performance by monitoring performance; troubleshooting network’s problems and outages, scheduling upgrades.

• Managed, configure and maintain all network security platforms and software

• Manage and support all data center cabling activities (install/label/document directly and through Facilities/Cabling Contractors)

• Maintained 24/7 system operations

Senior System Administrator 2005-2006

Hurray! Holding Co., Ltd (NASDAQ: HRAY)

• Designed, managed, installed and supported of all networking, Internet and operational services (including mobile value-added services and application acceleration system).

• Developed system operation SOP documents, security policies and procedures.

• Designed and deployed system backup/recovery strategies.

• Managed Firewall, IPS, Router and Switch.

• Managed internal and Co-location IDC

• Monitored systems and network performance, identified abuse of network and took appropriate actions.

• Tuned system performance for better capacity.

• Maintained 24/7 system operations

Certifications / Education

• ITIL V3 Expert

• Certified Information Systems Security Professional (CISSP)

• Certified Wireless Security Professional (CWSP)

• AWS Certified Security - Specialty

• Cisco Certified Internet work Expert (CCIE) – Security, Writing

• Cisco Certified Network Professional (CCNP)

• AWS Certified SysOps Administrator

• Cisco Certified Network Professional Associate (CCNA)

• Microsoft Certified System Engineer (MCSE)

• Computer Science Degree Beijing University of Technology References Available upon Request

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