Karim Mernit

I manage payroll for accounting firms and multi-site companies, securing every stage of the employee lifecycle and ensuring smooth transitions to modern tools.

I transform manual, time-consuming, and error-prone payroll processes into automated, compliant, and precisely managed systems, regardless of the complexity of collective agreements.

Who I cater to:

- Accounting firms managing multi-sector and multi-collective agreement client portfolios

- Companies and groups with multiple subsidiaries looking to secure their personnel administration

- HR decision-makers facing overload due to outdated software or lack of internal expertise

Why me?

- Over 600 client files supported across all my missions

- Over 20 different collective agreements mastered simultaneously

- 100% guaranteed service continuity during transitions and urgent takeovers

- Managed multiple migrations to Silae without production interruptions

Examples of professional achievements:

- Migration of 150 client portfolios to a new tool without any salary payment delays

- Urgent takeover of a portfolio of 300 payslips under 20 collective agreements due to staff absence

- Centralization of 340 monthly payslips with elimination of repetitive manual entries

- Support for executives during URSSAF audits and securing complex departure procedures

They trusted me: Fiteco • BCRH & Associés • Rm consult'in • EXCLEA

What I offer:

- Full payroll management, from employee onboarding to termination

- Payroll software migration management, including training

- Legal security and continuous regulatory monitoring

- Daily social consulting and audit support

- Guaranteed service continuity, including in emergencies

Don't wait, let's secure your payroll management together

EXCLEA needed to secure its multi-collective agreement payroll management against time-consuming manual processes and significant risks of regulatory non-compliance for its clients.

I was tasked with ensuring the reliability of payroll production for 75 client files and managing the complete transition to an automated and efficient tool.

Actions taken:

- Migration and transfer of 70 complex client files to Silae to centralize the production of 340 monthly payslips

- Automation and setup of specific calculation rules to eliminate repetitive monthly manual entries

- Technical management of collective agreement mergers and integration of specific rules like the thirteenth month and bonuses

- Continuous regulatory monitoring and direct client advice to anticipate legal developments and ensure their compliance

👉 Results achieved:

- Successful technological transition with no interruption in payroll production for clients

- Significant monthly time savings and drastic reduction in data entry error risk thanks to automation

- Full compliance and legal security for the entire client portfolio

I worked with accounting firms and companies where payroll management threatened to disrupt operations or generate major compliance errors.

I focused on securing payslip production, ensuring reliability during the transition to a new management tool, and maintaining service continuity during unforeseen absences in complex multi-collective agreement contexts.

Actions taken:

- Overall management of the migration of 150 client portfolios to Silae software

- Full deployment of payroll and personnel administration processes for a large hotel group with 18 subsidiaries

- Technical setup audits and training for payroll managers to secure and ensure the reliability of daily operations

- Urgent takeover of a portfolio of 30 files representing 300 payslips under 20 different collective agreements due to a prolonged staff absence

- Operational management of a portfolio of 30 files representing 300 monthly payrolls

👉 Results achieved:

- 100% guaranteed service continuity with no salary payment delays during transitions

- Regulatory security of payroll processes and immediate skills enhancement for payroll managers