Click here for more detail on the Feb. 1 sentence of Pierre Duhaime, who was terminated in 2012 as evidence of ethics lapses on projects surfaced in the Montreal-based global giant, which has since transformed its C-suite and its corporate transparency.

But SNC-Lavalin also faces new business challenges in a more tense Canada-Saudi Arabia political climate.

Even so, some analysts remain bullish on the company's future.