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Sentinel Technologies

IT services, cloud, and security solutions

Senior Systems Engineer - VMware & Microsoft Infrastructure

Full-TimeDeadline 9/23/27
$48 - $57/hr
Senior
Bachelor's
Cicero, IL, USA
In PersonOnsite position in Cicero, Illinois.
No H1B Sponsorship

About the job

Requirements
  • Significant hands-on experience administering and supporting enterprise VMware environments.
  • Strong expertise with VMware vSphere, ESXi, vCenter, VMware lifecycle management, upgrades, performance optimization, Active Directory, Microsoft 365, Entra ID, and Intune.
  • Experience designing, managing, and troubleshooting highly available virtualized environments.
  • Experience supporting hybrid Microsoft infrastructure environments hosted on VMware platforms.
  • Strong understanding of storage, compute, networking, and virtualization concepts.
  • Experience with VMware capacity planning, performance tuning, disaster recovery, and infrastructure modernization initiatives.
  • Strong understanding of identity and access management principles.
  • Experience with PowerShell scripting and automation.
  • Proven ability to troubleshoot complex infrastructure issues across VMware and Microsoft technology stacks.
  • Experience documenting environments, implementing standards, and driving infrastructure improvements.
  • Legally authorized to work in the United States without sponsorship.
Responsibilities
  • Serve as the organization's onsite technical subject matter expert for VMware, Active Directory, Microsoft 365, Entra ID, and Intune environments.
  • Administer, optimize, and modernize the organization's VMware infrastructure.
  • Help establish long-term architecture, standards, governance, and best practices.
  • Collaborate closely with team members through knowledge sharing and mentorship.
  • Work effectively across teams to support infrastructure operations and improvements.
Desired Qualifications
  • A bachelor's degree in Information Technology, Computer Science, or a related field.
  • VMware certifications such as VCP or VCAP.
  • Relevant Microsoft infrastructure certifications.
  • Experience participating in virtualization migrations, datacenter transformations, or infrastructure modernization projects.

About the company

Sentinel Technologies provides IT services and solutions to businesses of all sizes, focusing on end-to-end IT infrastructure and support. It offers 24/7 managed services via a Network Operations Center (NOC) and a Security Operations Center (SOC) for monitoring and managing networks, servers, and applications; CloudSelect ITaaS to modernize IT; Fortis cybersecurity services; IT consulting; and technology resale through partnerships with Cisco, Dell EMC, and Microsoft. The company differentiates itself with long-tenured leadership, an integrated service model that combines security, cloud, and consulting, and a nationwide and international client base. Its goal is to help clients improve operational efficiency and business performance by delivering scalable IT solutions that align technology with business needs.

Company Size

501-1,000

Company Stage

Seed

Total Funding

$400K

Headquarters

Downers Grove, Illinois

Founded

2009

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What believers are saying

  • The July 2025 MSP 501 ranking supports stronger market visibility and sales credibility.
  • CRN's April 2026 interview cites growing security demand and refreshed detection-response offerings.
  • OnDefend BAS services and Zscaler authorization deepen higher-margin cybersecurity attach opportunities immediately.

What critics are saying

  • Cisco 360 certification required substantial investment, pressuring margins through 2026.
  • Acquiring HPT creates integration risk across culture, delivery standards, and customer retention in 2026.
  • Heavy dependence on vendor ecosystems like Cisco, Google, Zscaler, and Microsoft constrains differentiation.

What makes Sentinel Technologies unique

  • Sentinel’s 1982 leadership continuity gives clients unusually stable account ownership.
  • Zscaler MSSP authorization, earned December 2023, strengthens its managed-security credibility.
  • The 2025 High Performance Technologies acquisition expands geographic reach and lifecycle-services depth.

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Benefits

Health Insurance

Dental Insurance

Vision Insurance

Life Insurance

Disability Insurance

401(k) Retirement Plan

401(k) Company Match

Family Planning Benefits

Unlimited Paid Time Off

Paid Vacation

Flexible Work Hours

Growth & Insights and Company News

Headcount

6 month growth

↑ 0%

1 year growth

↑ 0%

2 year growth

↑ 0%
Business Wire
Apr 16th, 2026
Horizon3.ai scales partner ecosystem with 32% of Q4 bookings sourced through channel

Horizon3.ai held its second annual Global Partner Conference in Orlando, Florida, bringing together over 100 partners and signalling expanded investment in its channel ecosystem. The AI-native security company reported that 32% of Q4 bookings came through partners, with approximately 70% of customers supported by managed security service providers. The company launched a Partner Advisory Board and is implementing new programmes to strengthen partner alignment and execution. Key partners attending include NCC Group, Optiv, Thrive, CDW and Sentinel Technologies. Horizon3.ai recently reported 102% year-over-year ARR growth, with over 5,200 organisations globally using its NodeZero platform to identify exploitable attack paths. The company was recognised by Fast Company as one of the World's Most Innovative Companies of 2026.

Sentinel
Apr 9th, 2026
Sentinel Technologies acquires High Performance Technologies to expand IT capabilities

Sentinel Technologies has acquired High Performance Technologies (HPT), a Southeastern-based IT solutions provider, to expand its service offerings and geographic reach. The acquisition combines Sentinel's scale and resources with HPT's technical expertise and agile delivery model. HPT, founded in 2002, specialises in customised IT lifecycle solutions across traditional, emerging and cloud technologies. The company's team will continue serving existing markets whilst gaining access to Sentinel's broader portfolio and next-generation technologies. Founded in 1982, Sentinel Technologies provides business technology services, cybersecurity and IT support. The acquisition advances Sentinel's growth strategy whilst maintaining both companies' customer-first approach. Financial terms were not disclosed.

Pamarco
Jul 18th, 2025
Sentinel's Cutting-Edge iPro Ink Management System Recognized with 2025 Pinnacle Award

CARROLLTON, TX - July 15, 2025 - Sentinel, a global leader in automated ink management solutions, is proud to announce it has been awarded a 2025 Pinnacle Award, recognizing the company's outstanding innovation for its iPro Ink Management System in the Technology category.

Sentinel
Mar 13th, 2025
Sentinel Wins Illumio 2025 Global Partner Award for Managed Service Provider of the Year

Illumio's Global Partner Awards honor exceptional partners from the past fiscal year who have gone above and beyond to cultivate strong, mutually beneficial relationships.

Sentinel
Feb 1st, 2024
Sentinel Technologies, Inc. Earns 2024 Top Workplaces for Remote Work Award

Sentinel Technologies, Inc. earns 2024 Top Workplaces for Remote Work award.