Marian de Jong

Marian de Jong

Finance

I have been with Yellowstone International’s Finance department since April 2008. Together with Henny and Lisette I take care of anything financial in our subsidiaries Yellowstone Managed Services and Yellowstone Contract Management, like timesheets, accounts payable and accounts receivable and so on.

I work on Mondays, Tuesdays, Wednesdays, and Thursdays.

Henny Thijs

Henny Thijs

Finance

Since April 2006 I have been working in Finance here at Yellowstone International. On Mondays, Thursdays and Fridays Marian, Lisette and I handle all administrative and financial matters for Yellowstone Managed Services and Yellowstone Contract Management.  Moreover, I keep our pension and absenteeism records, and oversee the accountants and auditors in compliance with our NEN-certification.

I work on Mondays, Thursdays and Fridays

Lisette van der Steen

Finance

Yellowstone International has grown fast, and early 2019 I joined the finance team, ensuring the correct registration, invoicing and handling of timesheets. I assist Marian and Henny in all their financial duties, such as recording absenteeism.

I work on Mondays, Tuesdays, Wednesdays till 12:00 a.m., Thursdays and Fridays till 12:00 a.m.