R

R3 LLC Tech Stack

Managed IT services and cybersecurity for enterprise clients

Information Technology & Services Frederick, Maryland 51–200 employees Founded 2007 Privately Held

R3 is a 51–200-person managed IT and cybersecurity services firm built around Microsoft and Azure infrastructure. The tech stack is heavily Azure-native (Sentinel, Monitor, Log Analytics, Defender, Landing Zones) paired with ConnectWise Automate for service delivery, signaling deep integration into the Microsoft enterprise ecosystem. Active hiring across support, engineering, and security—with a notable Development Environment Lead role—combined with projects around Sentinel SIEM deployment, infrastructure-as-code, and patch automation suggests R3 is scaling its internal platform maturity to match growing client demand.

Tech Stack 39 technologies

Core StackIntune Windows Server Active Directory Python Mailchimp Canva Azure Microsoft 365 Microsoft Defender for Endpoint Teams Exchange Online ConnectWise Automate Mimecast Cisco Meraki Azure Sentinel Microsoft Defender for Cloud Azure Monitor Azure Log Analytics PowerShell Azure Activity Logs Azure Security Center Azure Logic Apps Windows Kusto Query Language Windows Server 2012 R2 macOS Azure Policy Instagram TikTok LinkedIn+8 more

AdoptingAzure Landing Zones

What R3 LLC Is Building

◆Challenges

Reducing downtime across client-facing services
Security compliance alignment
Server infrastructure migrations
Optimizing sentinel performance
Patch management challenges
Cost-effective sentinel deployment
Cost-effectiveness of azure sentinel
Remote patch management
Service delivery gaps
Meeting slas

▲Active Projects

Azure sentinel siem implementation
Implement procedural improvements
Design and implement azure sentinel architecture
Develop custom analytics rules and hunting queries
Implement automation playbooks for incident response
Server infrastructure migrations
Remote patch management
Custom analytics rules development
Azure landing zones aligned with caf
Infrastructure-as-code initiatives

Hiring Activity

Accelerating20 roles · 15 in 30d

Department

Support

6

Engineering

5

Ops

3

Security

2

Finance

1

HR

1

Marketing

1

Seniority

Senior

6

Intern

4

Mid

4

Lead

2

Junior

1

Manager

1

Principal

1

Notable leadership hires: Development Environment Lead

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About R3 LLC

R3 delivers managed IT services, cybersecurity, and governance/risk/compliance support to enterprise clients across law, finance, healthcare, and construction verticals. The firm handles end-to-end infrastructure design, cloud migration (particularly to Azure), disaster recovery, help-desk operations, and security monitoring. Service delivery runs through ConnectWise Automate with visibility provided by Azure Sentinel SIEM and Microsoft Defender tooling. The company operates from Frederick, Maryland and has built its service model around consulting-driven resource allocation and accountability-based client outcomes.

HeadquartersFrederick, Maryland

Company Size51–200 employees

Founded2007

Hiring MarketsUnited States

Frequently Asked Questions

What tech stack does R3 use for IT services?

R3's core stack is Azure (Sentinel, Monitor, Defender, Log Analytics, Landing Zones), Microsoft 365, Intune, Active Directory, ConnectWise Automate for service delivery, Cisco Meraki for networking, and Mimecast for email security. PowerShell and Kusto Query Language are used for automation and analytics.

What is R3 working on?

R3 is implementing Azure Sentinel SIEM with custom analytics rules and hunting queries, migrating client server infrastructure to Azure, deploying Azure Landing Zones aligned with Cloud Adoption Framework, automating patch management and incident response, and building infrastructure-as-code initiatives to improve operational scale.