Sr. Systems Administrator

  • Singapore
  • Full-time

Company Description

As the world's leader in digital payments technology, Visa's mission is to connect the world through the most creative, reliable and secure payment network - enabling individuals, businesses, and economies to thrive. Our advanced global processing network, VisaNet, provides secure and reliable payments around the world, and is capable of handling more than 65,000 transaction messages a second. The company's dedication to innovation drives the rapid growth of connected commerce on any device, and fuels the dream of a cashless future for everyone, everywhere. As the world moves from analog to digital, Visa is applying our brand, products, people, network and scale to reshape the future of commerce.

At Visa, your individuality fits right in. Working here gives you an opportunity to impact the world, invest in your career growth, and be part of an inclusive and diverse workplace. We are a global team of disruptors, trailblazers, innovators and risk-takers who are helping drive economic growth in even the most remote parts of the world, creatively moving the industry forward, and doing meaningful work that brings financial literacy and digital commerce to millions of unbanked and underserved consumers.

You're an Individual. We're the team for you. Together, let's transform the way the world pays.

Job Description

  • Exposure in deploying, managing and maintaining large enterprise virtualization technologies including Cloud, KVM, Docker containers, OpenStack (HOS).

  • Responsible for the ongoing maintenance, security, and availability of Systems infrastructure based on business requirements and adhering to tight operations, security, and procedural models
  • Operate in complex, highly-secure, highly-available, operations-centric datacenter environments and interact with other technology domain experts as required
  • Respond to and resolve incident and problem tickets
  • Document and thoroughly understand the application architecture, system configuration across platforms and interface with various systems and use this knowledge effectively to resolve issues
  • Work closely with customer support team to communicate the root cause of the outage, duration and recommendations or steps to resolve issues
  • Demonstrate a high level of technical expertise to support complex Unix Systems across all tiers, under minimal supervision
  • Exposure converged hardware including Cisco UCS, HP and Hitachi HDS.

  • Proficient in troubleshooting storage related issues as it relates to EMC/Hitachi HDS storage arrays, extending to the basic support knowledge of Brocade storage switch technologies.

  • Must have Strong Knowledge & experience in system monitoring techniques and tools supporting unattended operations.

  • Responsible for partnering with the Platform, Engineering and Delivery Teams to deliver seamless infrastructure support for all Visa business lines

  • Responsible for adherence of established ITIL practice

  • Ability to operate in complex, highly-secure, and highly-available, operations environments and interact with the technology domain experts required to maintain those environments

  • Position will require shift based work hours.
  • Provide automation solutions of manual tasks performed by infrastructure support.
  • Will work closely with areas across Visa including, Operations, Engineering, Service Product office, and Global Open System Development Lines.
  • The candidate will be heavily involved in ensuring team meets all SLA's and team objectives.
  • Managing large heterogeneous infrastructure involving Linux, AIX
  • Lead and participate in the determination of root causes for service failure and support escalation, using knowledge and experience of VMWare ESX vSphere, UCS,  Server, Blade technology (Cisco/HP/Dell),  IBM VIO, Linux & AIX


Basic Qualifications:

  • 4 years of work experience with a Bachelor’s Degree or at least 2 years of work experience with an Advanced degree (e.g. Masters, MBA, JD, MD) or 0 years of work experience with a PhD degree

Preferred Qualifications:

  • 7-10 years of work experience and a Bachelor’s Degree or 6 years of work experience with an Advanced Degree (e.g. Masters, MBA, JD, MD) or 3 years of experience with a PhD.
  • Must have at least 5+ Years of Unix Systems Administration experience in relevant technologies

  • Exposure in Virtualization technologies such as Docker, KVM, Containers, OpenStack

  • Experience supporting shared infrastructure i.e. HP blade server / Cisco Blade (UCS) / Dell Blade (UCS) Infrastructure (Dell, HP, VMWare), IBM Power Systems

  • Strength in scripting against UNIX/Linux/VMWare/Docker: Shell, Python, Perl & Power CLI. BAO automation experience is highly recommended

  • Experience in storage technologies is required

  • Experience in supporting virtualization technologies such as VMWare ESX, IBM VIO

  • Experience in supporting cluster technologies such as GPFS

  • Experience working in large, complex, enterprise datacenter environments

  • Ability to write technical design and build documentation for all aspects of Unix Infrastructure

  • Excellent verbal, written, skills; in particular, demonstrated ability to effectively communicate technical and business issues and solutions to multiple organizational levels internally and externally

  • Strong understanding of process orientation ( ITIL), understanding of project management techniques, methodologies and best practices

  • Individual should be self-motivated with the ability to work independently

  • Sound planning, organizational and problem solving skills

  • Candidate must have excellent interpersonal skills with ability to communicate effectively with both technical and non-technical customers

  • Strong project, organizational, presentation, and writing skills

  • Demonstrated ability to meet deadlines and commitments in an environment that requires multitasking among concurrent projects

  • Experience supporting a 24x7 Operational environment, requiring shift support

  • Strong organizational skills with the ability to adapt quickly to changing priorities and assignments

  • Ability to set goals and objectives, prioritize, and manage situations to satisfactory completion

  • Ability to coordinate activities within cross-divisional and cross-functional teams

  • Bachelor’s degree in Computer Science/Engineering or related field is preferred

Additional Information

Work Hours This position requires the incumbent to be available during core business hours.

Travel Requirements This position requires the incumbent to travel for work less than 10% of the time.

Mental/Physical Requirements This position will be performed in an office setting.  The position will require the incumbent to sit and stand at a desk, communicate in person and by telephone, frequently operate standard office equipment, such as telephones and computers, reach with hands and arms, and bend or lift up to 25 pounds.


Visa will consider for employment qualified applicants with criminal histories in a manner consistent with EEOC guidelines and applicable local law.

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