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Callens Tech Stack

Industrial heat and HVAC systems for process manufacturing

Mechanical Or Industrial Engineering Waregem 201–500 employees Founded 1966 Privately Held

Callens is a Belgian family-owned industrial services firm established in 1966, now operating across four locations (Waregem, Geel, Liège, Arnhem) serving mid-market process manufacturers. The tech stack is Microsoft-centric (365, Azure, Entra, Teams, SharePoint) with VMware and Veeam for infrastructure — a standard enterprise foundation typical of established industrial firms. Current hiring momentum centers on operations and engineering roles with mid-level seniority, paired with active projects in workplace modernization, security hardening, and cloud management, suggesting the company is strengthening internal systems alongside external service delivery.

Tech Stack 11 technologies

Core StackIntune VMware Microsoft 365 Azure Entra ID Azure Teams SharePoint Online Exchange Online Veeam Aruba Topdesk

What Callens Is Building

◆Challenges

Meeting higher safety expectations
Ensuring compliance with iso 9001 and iso 14001
Preventing unsafe incidents
Modernizing digital workplace
Strengthening it security
Need permanent hr partner

▲Active Projects

Afvalstoffenregisters
Watertellers
Veiligheidsmachtigingen
Workplace modernization
Security enhancement
Cloud management
Regional recruitment

Hiring Activity

Accelerating6 roles · 3 in 30d

Department

Ops

2

Engineering

1

HR

1

Support

1

Seniority

Mid

4

Senior

1

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About Callens

Callens provides integrated heat and air-handling solutions for the process industries — steam systems, thermal oil, industrial HVAC, rental boilers, and piping — alongside technical support and compliance. The company operates four regional hubs and serves customers requiring reliable process temperature control and industrial infrastructure. A 57-year track record reflects stability; current strategic priorities include ISO 9001 and ISO 14001 compliance, workplace safety enhancements, and digital infrastructure modernization. Hiring is localized to Belgium and tilted toward operations and mid-level technical roles.

HeadquartersWaregem

Company Size201–500 employees

Founded1966

Hiring MarketsBelgium

Frequently Asked Questions

What is Callens' tech stack?

Microsoft 365 ecosystem (Teams, SharePoint, Exchange), Azure cloud platform with Entra ID, VMware, Veeam backup, and Topdesk IT service management. Primarily enterprise Microsoft infrastructure.

Where is Callens headquartered?

Waregem, Belgium. The company also operates offices in Geel (Belgium), Liège (Belgium), and Arnhem (Netherlands), serving the Benelux and northwest European process industries.