A senior Sydney lawyer employed by the Australian government and a former financial worker have been charged over their alleged involvement in a sophisticated drug syndicate.

On Thursday morning following a two-month police investigation, Nick Gouliaditis was arrested at his Sydney office in Martin Place, where he is employed as a senior executive lawyer with the Australian Government Solicitor - the agency that provides legal advice to the government.

Police lead the 34-year-old lawyer from his Martin Place office. Credit:Police Media

The 34-year-old was charged with suppling the drugs methylamphetamine (ice) and gamma-hydroxybutyrate (GHB) as well as dealing in the proceeds of crime, resisting arrest and possessing a prohibited firearm.

In a bail application before Central Local Court on Friday, it was alleged that Mr Gouiliaditis and his co-accused, Andrew Connell, 25, were part of a "sophisticated syndicate" that supplied drugs to mid-level drug dealers.