Oilfield services group Schlumberger has selected Tulchan to handle the financial PR surrounding its pounds 3.6bn all-cash offer for information technology services group Sema.
The win marks Tulchan's first major international transaction business after the agency launched in May last year.
Tulchan founder Andrew Grant leads the account, heading a two-strong team.
'It's the company's first major acquisition in the UK. They wanted a team to guide them through the mysteries of the British market,' said Grant.
He added that Tulchan will be targeting the financial media and Sema's shareholders as part of the remit.
The agency reports to Schlumberger vice-president of communications Rex Ross and CEO Euan Baird. Schlumberger's acting investment bank, Lehman Brothers, recommended Tulchan to the firm. Baird expects to conclude the Sema deal within the next three months.
The Franco-American firm also acquired a smartcard division of French IT company Groupe Bull last Friday (9 February) for pounds 224m. Schlumberger recorded revenue of pounds 6.6bn in 2000.