Senior Systems Engineer (Microsoft Infrastructure)

careers-sentinel; Cicero (IL); On-site; USD 66,000 - 79,000; Full time

Job summary

Sentinel Technologies, Inc. is seeking a Senior Systems Engineer to act as the on-site technical subject matter expert for Microsoft infrastructure, including Active Directory, Microsoft 365, Entra ID, Intune, and VMware environments.

The role focuses on supporting and modernizing the existing infrastructure, establishing governance, standards, and best practices, and mentoring teammates. This contract-to-hire position is onsite in Cicero, Illinois.

Qualifications

• Significant hands-on experience administering enterprise Microsoft infrastructure environments.
• Strong expertise with: Active Directory, Microsoft 365, Entra ID, Intune, VMware.
• Experience supporting hybrid Microsoft environments.
• Strong understanding of identity and access management principles.
• Experience with PowerShell scripting and automation.
• Proven ability to troubleshoot complex infrastructure issues.
• Experience documenting environments, implementing standards, and driving infrastructure improvements.
• Strong communication and collaboration skills with the ability to work effectively across teams.
• Legally authorized to work in the US without sponsorship
• Must demonstrate a “can-do” attitude
• Bachelor's degree in IT, CS, or related field preferred.

Responsibilities

• Serve as onsite technical subject matter expert for Microsoft infrastructure (AD, M365, Entra ID, Intune, VMware).
• Support and modernize current infrastructure while establishing long-term architecture, standards, governance, and best practices.
• Collaborate with team members through knowledge sharing and mentorship to drive improvements.
• Transform and optimize enterprise environments rather than simply maintain them.

Skills

Active Directory

Microsoft 365

Entra ID

Intune

VMware

Hybrid infrastructure

PowerShell scripting

Infrastructure troubleshooting

Documentation & standards

Communication & collaboration

US work authorization

Education

Bachelor's degree in Information Technology/CS/Related field

Experience & certifications considered

Relevant Microsoft/VMware infrastructure certifications

Tools

PowerShell

VMware

Job description

Responsibilities

We are seeking a Senior Systems Engineer with deep expertise in Microsoft infrastructure technologies to serve as the organization's onsite technical subject matter expert for Active Directory, Microsoft 365, Intune, and VMware environments.

This individual will play a critical role in both supporting and modernizing the current infrastructure while helping establish long‑term architecture, standards, governance, and best practices. The ideal candidate is not only a strong systems administrator but also someone who understands infrastructure architecture, can drive improvements, and enjoys collaborating closely with team members through knowledge sharing and mentorship.

This is an excellent opportunity for a hands‑on infrastructure professional who enjoys transforming and optimizing enterprise environments rather than simply maintaining them.

This is a contract to hire position located onsite in Cicero, Illinois.

Qualifications

• Significant hands‑on experience administering enterprise Microsoft infrastructure environments.
• Strong expertise with:
• Active Directory
• Microsoft 365
• Entra ID
• Intune
• VMware
• Experience supporting hybrid Microsoft environments.
• Strong understanding of identity and access management principles.
• Experience with PowerShell scripting and automation.
• Proven ability to troubleshoot complex infrastructure issues.
• Experience documenting environments, implementing standards, and driving infrastructure improvements.
• Strong communication and collaboration skills with the ability to work effectively across teams.
• Legally authorized to work in the US without sponsorship
• Must demonstrate a “can-do” attitude

Preferred Requirements:

• Bachelor's degree in Information Technology, Computer Science, or a related field preferred.
• Equivalent combination of professional experience and technical expertise will also be considered.
• Relevant Microsoft, VMware, or infrastructure certifications are a plus.

We focus on candidates that display our “ACE” factor – Attitude, Compassion, and Enthusiasm to deliver quality solutions with exceptional customer service.

Compensation Range:

$48-$57 per hour

What you get:

We offer weekly competitive pay, medical, dental, vision, 401K and more.

Overview

MOTIVATED.....make IT happen!

Sentinel Technologies, Inc. has been rated a top workplace every year since 2012!

About Us:

Sentinel delivers solutions that can efficiently address a range of IT needs – from security, to communications, to systems & networks, to software applications, to cloud and managed services; all of which include our staffing solutions for our clients. Since 1982, Sentinel has grown from providing technology maintenance services to our current standing as one of the leading IT services and solutions provider in the US. We have aligned with many of today’s global technology leaders including Cisco, Dell, VMware and Microsoft. Sentinel services customers both nationally and internationally with primary support operating centers in Downers Grove (HQ), Chicago, and Springfield, IL; Phoenix, AZ.; Lansing, and Grand Rapids, MI; Milwaukee, WI; and Denver, CO.

If you are MOTIVATED… you can make IT happen at Sentinel. Our commitment to our employees is to create a work environment that encourages creativity, an entrepreneurial spirit, foster growth through certification and hands‑on training, and values a team-oriented culture with rewards based on impact!

If you share our passion about what technology can do and want to be part of a top workplace environment – we’d like to have you join our team. Learn more at www.sentinel.com/careers.

As part of Sentinel's employment process, candidates will be required to complete a background check. Only those that meet the minimum requirements will be contacted. No phone calls please.

Sentinel is proud to be an equal opportunity employer including disability and veterans. In accordance with Title VII and state regulations, all qualified applicants will receive consideration for employment without regard to race, color, religion, age, sex, sexual orientation, gender identity, national origin, marital status, pregnancy, genetics, disability, military, veteran status or any other basis protected by law.

If you are an individual with a disability and need assistance in applying for a position, please contact [e-mail].

The “Know Your Rights” Poster is available here

https://www.eeoc.gov/sites/default/files/2023-06/22-088_EEOC_KnowYourRights6.12ScreenRdr.pdf

Sentinel EEO Policy Statement is available here.

https://www.sentinel.com/about/diversity

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