Role Overview
Mastercard is hiring a Junior Network Engineer. This is a full-time role in O'Fallon, Missouri. posted today. applications are still in the early window, before most candidates have applied. Full responsibilities, required qualifications, and the apply link are listed in the description below.
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Job description
Our Purpose
Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we’re helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential.
Title and Summary
Junior Network EngineerOur PurposeWe work to connect and power an inclusive, digital economy that benefits everyone, everywhere by making transactions safe, simple, smart, and accessible.
Using secure data and networks, partnerships and passion, our innovations and solutions help individuals, financial institutions, governments, and businesses realize their greatest potential.
Our decency quotient, or DQ, drives our culture and everything we do inside and outside of our company.
We cultivate a culture of inclusion for all employees that respects their individual strengths, views, and experiences.
We believe that our differences enable us to be a better team – one that makes better decisions, drives innovation, and delivers better business results.
Who is Mastercard?
Mastercard is a global technology company in the payments industry.
Our mission is to connect and power an inclusive, digital economy that benefits everyone, everywhere by making transactions safe, simple, smart, and accessible.
Using secure data and networks, partnerships and passion, our innovations and solutions help individuals, financial institutions, governments, and businesses realize their greatest potential.
Our decency quotient, or DQ, drives our culture and everything we do inside and outside of our company.
With connections across more than 210 countries and territories, we are building a sustainable world that unlocks priceless possibilities for all.
Overview
The Global Provisioning Team is providing consumers with a single point of contact to request infrastructure changes, reduce hand-offs and SLA wait time.
The Platform Engineer drives efficiency and provides value to our internal customers and stakeholders. The Platform Engineer II drives efficiency and provides value to our internal customers and stakeholders.
The ideal candidate is highly motivated, intellectually curious, is curious on how to improve processes and possesses an entrepreneurial mindset.
Role
In this position, you will:
• Manage Smart PDU monitoring and infrastructure health.
• Support port capacity tracking and utilization reporting.
• Maintain DCIM systems, asset inventories, and operational data.
• Provide operational support for data centre infrastructure services.
• Troubleshoot and resolve infrastructure incidents and service requests.
• Support infrastructure deployments, upgrades, and lifecycle activities.
• Contribute to automation and operational efficiency initiatives.
• Develop technical documentation and operational procedures.
• Collaborate with engineering teams on infrastructure improvements.
• Ensure compliance with operational and security standards.
All About You
• Platform engineering expertise with exposure to two or more of the following areas: LAN, firewalls, Routing and Switching technologies while adhering to standard design methodologies and best practices.
• Mastery of TCP/IP protocol communications, addressing & subnetting, knowledgeable with IPV6 addressing.
• Knowledge of Cisco’s product portfolio: routers, switches, ACI.
• Knowledge of Aruba product portfolio: switches, ClearPass, APs.
• Knowledge of Arista product portfolio: Spine leaf architecture, Cloud Vision.
• Cisco certifications such as CCNA required, DCCOR preferred.
• Familiarity with scripting tools such as Python, Ansible and Automation to improve process efficiencies and remove errors due to manual inputs.
• Knowledge of Infoblox (inc. DHCP, DNS).
• Datacenter support experience including racking and cabling of IT equipment is a plus.
• Ability to follow process - Evaluate and propose process enhancements to drive efficiencies.
Desirable or additional capabilities
• Strong verbal and written communications skills, and excellent customer support capabilities.
• Self-motivated demonstrating strong organizational and listening skills; and very detail oriented with the ability to carry out assigned tasks with minimal supervision.
• Ability to consistently act in a professional manner and communicate with all levels of the organization, both internally and externally.
• Methodical problem resolving skills.
• Implementation of Cisco ACI.
• Understanding of spine-leaf technologies and Cloud Vision is good to have.
• Bachelor’s degree in computer science, Math, Engineering or equivalent combination of education and experience.Mastercard is a merit-based, inclusive, equal opportunity employer that considers applicants without regard to gender, gender identity, sexual orientation, race, ethnicity, disabled or veteran status, or any other characteristic protected by law. We hire the most qualified candidate for the role. In the US or Canada, if you require accommodations or assistance to complete the online application process or during the recruitment process, please contact reasonable_accommodation@mastercard.com and identify the type of accommodation or assistance you are requesting. Do not include any medical or health information in this email. The Reasonable Accommodations team will respond to your email promptly.
Corporate Security Responsibility
All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must:
Abide by Mastercard’s security policies and practices;
Ensure the confidentiality and integrity of the information being accessed;
Report any suspected information security violation or breach, and
Complete all periodic mandatory security trainings in accordance with Mastercard’s guidelines.
Pay Ranges
O'Fallon, Missouri: $76,000 - $127,000 USDAbout Mastercard
Mastercard
mastercard.com
20 other open roles at Mastercard on TryApplyNow.
Frequently Asked Questions
How do I apply for the Junior Network Engineer position at Mastercard?
Use the Apply button above to submit your application directly to Mastercard. Most applications take less than 5 minutes if your resume and contact details are ready, and you'll be routed to the employer's official application system to finish.
Where is the Junior Network Engineer position at Mastercard located?
This position is based in O'Fallon, Missouri. Mastercard has not indicated remote or hybrid options for this role, so candidates should plan for on-site work.
What does a Junior Network Engineer at Mastercard earn?
Mastercard has not disclosed a salary range in this posting. Many employers share specifics later in the interview process; you can also ask during a recruiter screen if compensation transparency is important to you.
When was the Junior Network Engineer role at Mastercard posted?
This role was posted on July 24, 2026 (today). It's still listed as actively hiring; we re-confirm openings against the source system multiple times per day and remove closed roles.
Is the Junior Network Engineer role at Mastercard entry-level?
Yes. This is an entry-level position. Strong candidates typically have 0-2 years of relevant work experience, internships, or significant project work. Read the full description for any specific qualification requirements Mastercard has listed.
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