Senior AWS Cloud Engineer – EC2 & Linux Administration Job Chicago area,Illinois USA,IT/Tech

Specialist I
- Cloud Infrastructure Services Who We Are

Born digital, UST transforms lives through the power of technology. We walk alongside our clients and partners, embedding innovation and agility into everything they do. We help them create transformative experiences and human-centered solutions for a better world.

Role Description Senior AWS Cloud Engineer - EC2 & Linux Administration Specialist I
- Cloud Infrastructure Services Who We Are

UST is a mission-driven group of 29,000+ practical problem solvers and creative thinkers in more than 30 countries. Our entrepreneurial teams are empowered to innovate, act nimbly, and create a lasting and sustainable impact for our clients, their customers, and the communities in which we live.

With us, you'll create a boundless impact that transforms your career— and the lives of people across the world.

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You Are

UST is searching for a Senior AWS Cloud Engineer to join our Cloud Platform Engineering team, supporting the migration of on-premises workloads to AWS. This role is focused on the compute and OS layer of the migration — standing up, configuring, and hardening EC2 instances and administering the Linux systems that run our re-hosted applications. You will work closely with the rest of the migration team to plan cutover waves, right-size compute, and ensure migrated servers are secure, patched, and production-ready from day one on AWS.

The

Opportunity

Plan and execute lift-and-shift migration of on-premises servers to Amazon EC2
Build and maintain custom AMIs, instance configurations, and Auto Scaling groups for migrated workloads
Administer Linux servers — provisioning, patching, performance tuning, and troubleshooting — across the fleet
Configure supporting networking and security for EC2 workloads (VPC, security groups, NACLs, load balancers)
Harden and standardize server builds to meet security and compliance baselines
Automate provisioning and configuration management using scripting and config management tools
Validate post-migration performance and stability, and remediate issues found during cutover
Document server architecture, runbooks, and standard operating procedures

This position description identifies the responsibilities and tasks typically associated with the performance of the position. Other relevant essential functions may be required.

What You Need

(Must Have) Amazon EC2
Hands-on experience provisioning and managing EC2 instances at scale, including AMI creation and lifecycle management
Experience with instance types, Auto Scaling groups, and EBS volume management
Understands EC2 networking fundamentals - security groups, elastic IPs, placement groups Linux Administration
Strong hands‑on Linux system administration experience (RHEL, CentOS, Amazon Linux, or Ubuntu)
Comfortable with user/permissions management, systemd services, log management, and performance troubleshooting
Experience with shell scripting for automation and operational tasks
Experience with OS patching, hardening, and vulnerability remediation Lift & Shift Migration Experience
Has led or been a core contributor to at least one on-premises to AWS migration project
Experience with migration assessment, wave planning, and cutover execution
Comfortable working with legacy infrastructure and minimizing risk during transition
Preferred Qualifications (Nice to Have)
These skills will strengthen a candidate's profile but are not a hard requirement. AWS Certifications
AWS Certified Sys Ops Administrator
- Associate
AWS Certified Solutions Architect
- Associate or Professional Additional Experience
Experience with configuration management tools (Ansible, Chef, or Puppet)
Familiarity with AWS Application Migration Service (MGN) or AWS Data Sync
Experience with Infrastructure as Code (Cloud Formation or Terraform)
Exposure to containerization (Docker) or hybrid connectivity (Direct Connect, Site-to-Site VPN)

Core Technology Stack…