How TSK Supports 1,000+ Employees with Nitro PDF Pro and Nitro Sign

Key Results

15+ years using Nitro
67% of TSK employees use Nitro
50+ countries served by TSK
Integrates with existing business systems

TSK, a global engineering and construction company, has relied on Nitro for more than 15 years to support document workflows across its international workforce.

After initially selecting Nitro for its cost-effectiveness, functionality, and performance, TSK expanded its use to Nitro Sign to provide employees and clients with a secure, easy-to-use electronic signature solution. Today, more than 1,000 of TSK's 1,500 employees regularly use Nitro PDF Pro and Nitro Sign.

Widespread adoption

More than 1,000 TSK employees regularly use Nitro PDF Pro and Nitro Sign to process contracts and other important internal and external documents.

Secure solution

Nitro's OTP functionality ensures every signature is secure and compliant for TSK employees and their clients.

Seamlessly integrated

Pre-built integrations have enabled TSK to connect Nitro with other key business tools and make it an integral part of their operations.


Company	TSK
Industry	Engineering and Construction
Headquarters	Gijón, Spain
Employees	1,500
Customer since	2010
Challenge	Support a growing global workforce with secure digital document and eSignature workflows
Solution	Nitro PDF Pro and Nitro Sign
Results	More than 1,000 employees regularly use Nitro; secure eSigning with OTP functionality; integrations connect Nitro with other business tools

Why did TSK need an eSignature solution?

TSK is a global engineering business that provides sustainable technology solutions to industrial and energy-sector clients in more than 50 countries. As TSK's clients increasingly moved from manual to digital signing, its employees also needed a secure, easy-to-use electronic signature solution.

TSK had already relied on Nitro for its PDF editing needs since 2010. The company originally evaluated four PDF editing tools and selected Nitro based on cost-effectiveness, functionality, and overall performance.

When TSK began evaluating eSignature solutions, the company considered whether Nitro could provide the same combination of functionality, usability, and value for electronic signing that it had provided for PDF editing.

TSK CISO Iván Busto Alvarez explains: “End users were requesting a specific solution that many of their clients were using. But we also knew that Nitro had their own eSignature platform. The question was, could Nitro meet our requirements for eSigning as well as it does for PDF editing?”

The Final Results

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The Conclusion

How did TSK choose Nitro Sign?

TSK evaluated Nitro's eSignature capabilities through product demonstrations to determine whether they met its user requirements.

Nitro proved to be a strong fit for TSK's needs while offering a significantly lower cost than alternative providers. The company's existing relationship with Nitro was also an important consideration.

TSK's IT team valued having an established technology partner that already understood its needs and had provided ongoing support, flexibility, and assistance since the company's initial deployment in 2010.

Security was another critical requirement. TSK specifically needed one-time password (OTP) functionality as part of its eSignature solution. Nitro Sign provided the required capability.

The Final Results

The Conclusion

How does TSK use Nitro PDF Pro and Nitro Sign?

More than 1,000 of TSK's 1,500 employees regularly use Nitro PDF Pro and Nitro Sign to process contracts and other important internal and external documents.

Nitro supports TSK's digital document workflows by combining PDF editing and electronic signatures in solutions that employees can use to process business documents.

TSK also uses pre-built integrations to connect Nitro with other key business tools, making Nitro an integral part of its broader operations.

What results did TSK achieve with Nitro?

Key outcomes

More than 1,000 of TSK’s 1,500 employees regularly use Nitro PDF Pro and Nitro Sign
Nitro's OTP functionality supports secure electronic signatures
Pre-built integrations connect Nitro with other key business tools
TSK commends Nitro’s relability and low maintenance

TSK achieved widespread adoption of Nitro across its workforce while adding secure electronic signing capabilities to its existing PDF workflows.

The company's long-term use of Nitro also allowed TSK to build on an established technology partnership rather than introduce a separate eSignature provider.

Why did TSK choose Nitro PDF Pro and Nitro Sign?

TSK chose Nitro because it provided the functionality, cost-effectiveness, security, and ease of use the company required for its document workflows.

When TSK needed electronic signatures, Nitro provided an opportunity to extend that established partnership. Product demonstrations confirmed that Nitro Sign met user requirements, while OTP functionality addressed an important security requirement.

For TSK, the combination of PDF editing, eSigning, established support, integrations, and cost-effectiveness made Nitro a natural choice for its digital document workflows. "We have more than 1,000 employees regularly using Nitro–and virtually no problems,” said Juan Castrillón Díaz, IT Specialist at TSK. “This shows you what a robust and easy-to-use solution it is."