What technologies does 4Specialist use?

4Specialist uses Outlook, Microsoft Office 365, Mobile Friendly. View their full technology stack — including all 3 detected tools — on StackWho.

Who is the Chief Executive Officer of 4Specialist?

Piotr Plusa is the Chief Executive Officer at 4Specialist. Get verified contact information on StackWho.

Where is 4Specialist located?

4Specialist is based in Warszawa, woj. mazowieckie, Poland.

4Specialist

Q: What industry is 4Specialist in?

4Specialist operates in the human resources industry.

4specialist.com

human resources

4specialist.com

Warszawa, woj. mazowieckie, Poland

11-50 employees

LinkedIn Profile

About 4Specialist

administration, hr, account, bookkeeping, payroll, recruitment agency, human resources services, executive search, candidate screening, legal experts, legal services, consulting, boutique agency, services, candidate profiling, financial services, deep industry understanding, talent sourcing, recruitment process, candidate database

4Specialist's Tech Stack

Email

Microsoft Office 365 Outlook

Frontend

Mobile Friendly

Decision Makers at 4Specialist

1 contact

Piotr Plusa

Chief Executive Officer

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3 technologies detected · 1 decision maker · Emails available

Sales Outreach Angle

4Specialist uses Outlook, Microsoft Office 365, Mobile Friendly among other technologies. Use StackWho to identify the right decision-maker email for targeted sales outreach, recruiting, or partnership development.

4Specialist's Position in the StackWho Database

• 4Specialist is 1 of 6,565 human resources companies tracked in StackWho.
• 6,560 human resources companies in our database have verified decision-maker emails (100% of the cohort).
• 2,024 companies in woj. mazowieckie are in the StackWho database.
• 2,059 human resources companies are in the 11-50 employee range (same size as 4Specialist).

Technology detection from public web signals. Decision-maker contacts compiled from LinkedIn public profiles, company filings, and verified outbound testing. Methodology & sources · Updated July 2026.

Frequently Asked Questions

What technology does 4Specialist use?

4Specialist uses Outlook, Microsoft Office 365, Mobile Friendly. This data is sourced from StackWho's technology detection engine.

How do I contact the decision makers at 4Specialist?

StackWho has verified email addresses for 1 decision maker at 4Specialist. Pro members can access direct emails for the CEO, CTO, VP of Engineering, and other key contacts. Use StackWho to reach 4Specialist directly for sales, recruiting, or partnerships.

What industry is 4Specialist in?

4Specialist operates in the human resources industry, headquartered in Warszawa, woj. mazowieckie, Poland. StackWho tracks technology stacks and decision maker contacts for companies across all industries.

Can I export 4Specialist's contact data?

Yes. StackWho Pro members can export decision maker contact data for 4Specialist and similar companies to CSV. Use the export feature to build targeted prospect lists segmented by technology stack, industry, or location.