The company raised $A75 million in an oversubscribed initial public offering at $1.63 per share.

On volume of a little more than 646,000, shares briefly touched an intraday high of $1.625 before closing at $1.50.

The IPO is fully underwritten by Goldman Sachs Australia and UBS’ Australian arm.

The issue price will give the company an implied market capitalisation of $477.9 million.

Calibre delivers its services through four key subsidiaries – Xstract Mining Consultants, Calibre Global, Brown Consulting and Safety & Rescue Australia.

Pro forma revenue for the 2013 financial year is forecast to be $715 million with earnings before interest, tax, depreciation and amortisation of $89 million.

Calibre’s existing shareholders are not selling any shares in the IPO, with their shares subject to escrow.

US energy and infrastructure investment group First Reserve Corporation will retain a 60.9% holding and company founder Ray Munro will hang onto 11.6% of the company.

Calibre chairman Ray Horsburgh said the offer would allow it to pursue its growth strategy.

As well as Horsburgh and Munro, the board comprises managing director Rod Baxter, independent non-executive directors Peter Housden and Geoff Tomlinson and non-executive directors Brian MacDonald and Alex Williams.

This article first appeared in ILN's sister publication MiningNews.net.