Sr. Infrastructure System Administrator Jobs

Sr. System Engineer

Hewlett Packard Enterprise is the global edge-to-cloud company advancing the way...

Location

United States

Salary:

89400.00 - 206500.00 USD / Year

Hewlett Packard Enterprise

Expiration Date

Until further notice

Requirements

Master’s degree in computer science, or equivalent experience in a related field
7+ years of System and Cloud Administrator role
Experience leading and managing projects
Experience administering Windows AD, LDAP, and Domain Servers
Experience with mixed operating systems: mainly Linux and some Windows
Experience with Configuration Management and automation tools like Ansible, Chef, or Puppet
Experience with Virtualization (VMWare) and Storage Systems (NetApp, Nimble, Pure, etc.)
Project management
Experience in Hypervisors other than VMware. Ex. Proxmox , RHEL openshift
Knowledge of servers, storage, HCI, and FC switch configuration

Job Responsibility

Work closely with the business leaders to develop and implement project plans, risk assessments, capacity growth, and contingency plans
Remediate the Security Vulnerabilities for the systems
Supporting Windows and Linux Server Environments, including rack and stack the hardware
Active directory maintenance and monitoring as needed
Install, configure, test, and maintain operating systems, application software, and system management tools
monitor, and manage them
Proactively ensure the highest levels of systems and infrastructure availability
Monitor and test application performance for potential bottlenecks, identify possible solutions, and work with developers to implement those fixes
Maintain security, backup, and redundancy strategies
Document and automate the processes

What we offer

Health & Wellbeing
Personal & Professional Development
Unconditional Inclusion

Fulltime

Sr Network Administrator / Team Lead

Babcock Power is seeking a Lead Network Administrator to drive the design, imple...

Location

United States , Marlborough

Salary:

110000.00 - 140000.00 USD / Year

Babcock Power

Expiration Date

Until further notice

Requirements

10+ years of experience in a systems/network administration role supporting hybrid environments
Bachelor of Science in Information Systems or a related technical field
Advanced proficiency in Windows Server, Active Directory, and virtualization platforms (e.g., VMware/Hyper-V/Nutanix)
Hands-on experience with cloud platforms (AWS, Azure)
Self-motivated with track record of continuous skill development
Deep understanding of network protocols, security architecture, and systems automation
Clear, effective communicator with a focus on customer service and team collaboration
Experience leading and mentoring IT staff

Job Responsibility

Design, plan, and implement scalable, secure, and resilient network solutions (cloud, on-premises, hybrid)
Documentation of network topologies, system configurations, and IT processes
Oversee administration and maintenance of Windows Server environments (Active Directory, DNS, DHCP, Group Policy)
Manage virtualized infrastructure (VMware, Hyper-V, Nutanix) for performance and uptime
Lead response to incidents affecting global operations, providing remediation and root cause
Mentor IT Infrastructure staff and foster a culture of ownership and continuous improvement
Complete infrastructure related activities that deliver new capabilities to the business
Configure and troubleshoot routers, switches, VLANs, VNets, secure remote access, secure internet gateway, SDWAN, wireless infrastructure, and firewalls
Monitor network traffic, logs, and performance metrics to proactively resolve issues
Implement QoS, network segmentation, and access control policies

Fulltime

Sr Network Administrator

We are providing an incredible opportunity for a Sr Network Administrator to be ...

Location

United States , Cedar Rapids

Salary:

Not provided

Robert Half

Expiration Date

Until further notice

Requirements

Minimum of 5 years of experience working as a Network Administrator or in a similar type role
Demonstrated experience in managing Active Directory
Familiarity with Backup Technologies and their implementation
Skilled in handling Computer Hardware
Experience in Configuration Management
Ability to understand and navigate Contracts related to network management
Experience working with Google Cloud Platform

Job Responsibility

Monitor the operation within Cisco, Arista, and Meraki technologies
Implement and manage Technologies within the network infrastructure
Oversee the integration and usage of Cloud Technologies in the company's operations
Ensure system stability and efficiency by managing Active Directory and Backup Technologies
Handle computer hardware issues and Configuration Management tasks efficiently
Manage contracts related to network systems and services
Familiarize and utilize the Google Cloud Platform for network operations and management

What we offer

Medical, vision, dental, and life and disability insurance
401(k) plan

Fulltime

Semi Sr Application Database Administrator

The position has the responsibility for researching, troubleshooting, and suppor...

Location

Costa Rica , Heredia

Salary:

Not provided

Citi

Expiration Date

Until further notice

Requirements

Bachelor’s degree in computer science, Information Technology or equivalent professional experience
5+ years of experience as a Database Administrator, preferably in application database environments
Proficiency in database management systems such as Oracle and SQL Server
Strong understanding of SQL, PL/SQL for query optimization and troubleshooting
Experience with database performance tuning and monitoring tools
Familiarity with backup and recovery solutions, HA and DR
Knowledge of database security practices, including encryption, roles, and permissions
Solid understanding of database design, normalization, and data modeling principles
Experience working with ETL tools, APIs, or integration framework for data transformation
Proficiency in LINUX/Unix operating systems

Job Responsibility

Manage and maintain the organization’s application databases, ensuring optimal performance, availability, and security
Collaborate with developers to design, implement, and optimize database structures that align with application requirement
Perform database tuning and optimization, including indexing, query analysis, and resource allocation to maximize efficiency
Oversee database patching, upgrade, and migrations, ensuring minimal downtime and system reliability
Ensure the backup and recovery plans to safeguard data integrity and support disaster recovery strategies
Monitor database performance and proactively identify and resolve bottlenecks and issues
Implement and enforce database security policies, ensuring compliance with organizational and regulatory requirements
Troubleshoot and resolve complex database issues in collaboration with development and infrastructure team
Document database architectures, processes, and procedures to support operational and troubleshooting needs
Provide technical guidance and support to application teams on database-related topics and best practices

Fulltime

Info Security Tech Sr Analyst

Authentication Platforms Level 3 (L3) Operation Support team is responsible for ...

Location

India , Chennai

Salary:

Not provided

Citi

Expiration Date

Until further notice

Requirements

8+ Years in support business and work with System administrators, developers, and analysts with troubleshooting issues
3-5 years of relevant industry experience in one or more of the following: Enterprise Single Sign On (SSO), Authentication and Authorization Products
Identity and Access Management tools and processes
Strong ability to utilize Unix and Linux systems like Red hat Enterprise Linux 8.x/7.x/ 6.x.
Supporting complex, multi-tier, distributed systems - Webservers, App Servers, Network topologies (Demilitarized Zone, Firewall rules etc.) required to support applications utilizing the authentication infrastructure

Job Responsibility

Perform change management and incident management utilizing documented procedures through Service Now (SN) or similar change management tools
Support service recovery procedures
Be the point of contact for the Level 2 Team escalation
Participate in Problem Management processes to identify solutions for recurring problems
Document problem resolutions and publish knowledgebase
Work with vendor support, System administrators / architects on a regular basis and track issues to closure as a Subject Matter Expert
Support maintenance and migrations on the SSO infrastructure

Fulltime

Senior Operations Manager

The Senior Operations Manager is a key leader and owner of operational functiona...

Location

United States , Overland Park; Atlanta; Frisco; Bellevue

Salary:

92800.00 - 167400.00 USD / Year

T-Mobile

Expiration Date

Until further notice

Requirements

High School Diploma/GED
Bachelor's Degree or equivalent work experience
7+ years of experience in as a business owner or product owner role
2-4 years IT or Engineering knowledge and/or experience as it pertains to service provisioning and usage generation
2-4 years Prior experience working in wholesale/TFB
Expert understanding of business process and system process within telecom multiple knowledge areas
Experience with application support
Proficient in MS Office - specifically Excel, Word, Power Point
Detail oriented with an Accounting or Finance background
Ability to manage multiple projects concurrently

Job Responsibility

Defines the technical experience vision for the Wholesale partner to align with overarching business objectives
Responsible for identifying systematic opportunities to improve wholesale partners experience and reduce the administrative time spent within core systems and applications
Interact with departmental leadership teams and act as a liaison between cross-functional technical, Frontline organizations and Wholesale Partner
Drives the connection of strategy to best in class operational excellence
Aligns stakeholders and initiatives across the business
Plays a key role in shaping T-Mobile's Wholesale line of business day to day operations
Develop and deliver an exceptional Wholesale system experience in support of business strategy
Serve as a functional lead for specific and operational areas

What we offer

Competitive base salary and compensation package
Annual stock grant
Employee stock purchase plan
401(k)
Access to free, year-round money coaches
Medical, dental and vision insurance
Flexible spending account
Paid time off
Up to 12 paid holidays
Paid parental and family leave

Fulltime

Sr. Network Engineer

At Applied Network Solutions (ANS), we bring together some of the most curious m...

Location

United States , Annapolis Junction

Salary:

100000.00 - 200000.00 USD / Year

Applied Network Solutions

Expiration Date

Until further notice

Requirements

Ten (10) years' experience as an Engineer, applying fundamental skills and concepts using established procedures and standard practices to work problems on contracts of similar scope, type, and complexity is required
A Master's Degree in a field related to engineering from an accredited college or university is required
In lieu of a master's degree, a bachelor's degree and an additional four (4) years of experience is required
TS/SCI Poly Required

Job Responsibility

Monitors, analyzes, troubleshoots, and evaluates hardware, software and other network related problems
Manages the performance and configuration of the global networks and systems
Performs general LAN/CAN/WAN administration
Schedules conversions and cutover
Coordinates with all responsible users and sites to resolve network or system incidents
Responsible for monitoring, tracking and evaluating global Information Technology Infrastructure (ITI) incidents
Translates business requirements into telecommunications (e.g., LAN, CAN, WAN, Voice and Video) requirements, designs and orders
Perform in-depth engineering analysis of telecommunications alternatives for Government agencies
Coordinates Telecommunications services to support installations and maintenance
Resolves problems to include performance and configuration

What we offer

Family Medical, Dental (w/ adult orthodontia) and Vision coverage
Pet Discount Program
PTO (Paid Time Off)
Maternity/ Paternity Leave
Supplemental Military Leave Pay
11 Paid Holidays
401(k) plan with 6% Company Contribution
Generous Professional Development Program
100% Employer paid Short- and Long-Term Disability
100% Employer paid Life Insurance

Semi Sr. Platform Engineer Analyst IT Support

The Engineer Intmd Analyst is an intermediate level position responsible for a v...

Location

Costa Rica , Heredia

Salary:

Not provided

Citi

Expiration Date

Until further notice

Requirements

2-5 years of relevant experience in an Engineering role
Experience working in Financial Services or a large complex and/or global environment
Project Management experience
Consistently demonstrates clear and concise written and verbal communication
Comprehensive knowledge of design metrics, analytics tools, benchmarking activities and related reporting to identify best practices
Demonstrated analytic/diagnostic skills
Ability to work in a matrix environment and partner with virtual teams
Ability to work independently, prioritize, and take ownership of various parts of a project or initiative
Ability to work under pressure and manage to tight deadlines or unexpected changes in expectations or requirements
Proven track record of operational process change and improvement

Job Responsibility

Provide assistance with a product or product component development within the technology domain
Conduct product evaluations with vendors and recommend product customization for integration with systems
Assist with training activities, mentor junior team members and ensure team’s adherence to all control and compliance initiatives
Assist with application prototyping and recommend solutions around implementation
Provide third line support to identify the root cause of issues and react to systems and application outages or networking issues
Support projects and provide project status updates to project manager or Sr. Engineer
Partner with development teams to identify engineering requirements and assist with defining application/system requirements and processes
Create installation documentation, training materials, and deliver technical training to support the organization
Appropriately assess risk when business decisions are made, demonstrating particular consideration for the firm's reputation and safeguarding Citigroup, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgment regarding personal behavior, conduct and business practices, and escalating, managing and reporting control issues with transparency
Maintain essential IT operations, including Unix/Linux operating systems, Messaging middleware (MQ), Databases, Application and Web servers

Fulltime

Sr. Infrastructure System Administrator

Miracle Software Systems

Location:
India, Miracle Heights

Category:
IT - Administration

Contract Type:
Not provided

Salary:

Job Responsibility:

Requirements:

Additional Information:

Job Posted:
December 10, 2025

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Sr. Infrastructure System Administrator

Miracle Software Systems

Location:India, Miracle Heights

Category:IT - Administration

Contract Type:Not provided

Salary:

Job Responsibility:

Requirements:

Additional Information:

Job Posted:December 10, 2025

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