Systems Administrator - Global Infrastructure

Salary depends on experience
Posted on 09/21/17
New York, NY
Less than 5 years experience
Online Advertising & Marketing Services
Salary depends on experience
Posted on 09/21/17

Systems Administrator - Global Infrastructure

The Technical Operations team is distributed across the globe and handles a wide variety of responsibilities, from providing tech support to architecting long-range build-out and day-to-day operations at our seven global data centers. We have well over 8,000 servers, which process over a million of ad serving requests per second (billions per day). All production systems run on Linux, with employees running roughly 70% Mac and 30% Windows laptops.

As part of Technical Operations, the CorpIT Infrastructure team at AppNexus is responsible for the internal networks and systems that support our global corporate offices. Items under our purview consist of wired & wireless networks and their associated core network services, global video-conferencing, phone systems and our corporate VPN services. We select hardware, design our networks, implement and support them, which gives our SAS exposure to systems and techniques that they wouldn’t find at most companies. This is a fast-paced and demanding environment where you will have a chance to work with and help shape a rapidly growing, world class IT infrastructure. 
About the job:

  • Manage and maintain our existing internal wired, wireless networks and services
  • Architect new networks and prepare existing systems for massive growth 
  • Automate deployment related and repetitive tasks using scriptinglanguages, puppet, and/or other automation frameworks
  • Proactively monitor and maintain all internally facing systems and services 
  • Report to IT Management on service levels achieved and on-time delivery of service 
  • Participate in 24X7X365 support of critical Corporate systems 
  • Write and update documentation on all systems and services 
  • Act as escalation point for Help Desk technicians regarding corporate IT systems 
  • We’re in search of troubleshooters and those who love to tinker and innovate with technology


About your skills:

  • 3+ years of experience with TCP/IPNetworking, preferably using Cisco, Juniper or Fortinet. Having worked in a multi-vendor environment is a plus. 
  • 2+ years of experience managing wired and wireless networks. 
  • 2+ years of experience using Unix/Linux
  • 2+ years of experience with Microsoft Hyper-V or VMware
  • 2+ years of experience managing a VPNinfrastructure
  • Ability to participate in an on-call rotation 
  • Familiarity with Windows or a strong desire to learn 
  • Excellent interpersonal, written and verbal (phone) communication skills 
  • Experience managing PBX systems
  • Experience managing video-conferencing systems 
  • Ability to function as an individual contributor or as a team member depending on project/situation 
  • Desired but not required: Bachelor's degree in CS or MIS Experience with systems automation (puppet, chef, cfengine, etc)
  • Good documentation skills 

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