Friday's landmark ruling against the former telecoms monopoly is bound to reverberate in French boardrooms as it could pave the way for other similar collective procedures.
The court sentenced Lombard to a year in jail, of which eight months will be suspended, and a €15,000 ($NZ25,00) fine.
Yet since that term is under two years and as Lombard does not present a danger to society, he will not spend time behind bars under French court rules.
The traumatic episode of workers' deaths at the company in the late 2000s led to deep soul-searching over corporate culture in France.
The court found Orange guilty of the same charge, and fined it €75,000.
"In financial terms, the sentence is light, but this is the first time a French company gets a criminal conviction for moral harassment and that is very bad in terms of reputation," said a lawyer specialising in white-collar crime.
The lawyer, who declined to be named, added the ruling will be a major concern for other companies as it sets a precedent for corporate responsibility in moral harassment and employee burn-out cases.
Many individual managers have been convicted of harassment - and often fired as a result - but not companies themselves.
Orange, which in 2018 had core earnings of €3.3 billion, said it would not appeal the verdict.
Orange has previously acknowledged the suffering expressed by victims and recognised there may have been management errors in implementing the restructuring plan but denies there was any systemic plan or intention to harass employees.
COMPENSATION CLAIMS
Prosecutors argued that some of the methods employed in a deep restructuring of the company, then known as France Telecom, after privatisation prompted a wave of suicides.
Lombard (77) and three other former Orange executives also accused of "moral harassment" have denied any wrongdoing and said the restructuring plan was an economic necessity.
Orange used the last day of the trial in July to offer compensation to victims and relatives of those who died. The presiding judge estimated that claims for compensation so far were about €2 million.
The case centres around a drive by the former state monopoly to shed 22,000 jobs and redeploy another 10,000 as it adapted to competition in the private sector.
In a country where workers employed on state contracts expect jobs for life and employees in both private and public sectors enjoy strong labour law protection, unions alleged that management sought ways to encourage workers to quit or accept reassignment.
Prosecutors listed at least 18 suicides and 13 suicide attempts between April 2008 and June 2010.
Where to get help in NZ
Suicide/depression related
Need to talk? Free call or text 1737 any time for support from a trained counsellor
Depression healthline: 0800 611 116
Lifeline Aotearoa: 0800 543 354
Suicide Crisis Helpline: 0508 828 865 (0508 TAUTOKO)
Samaritans: 0800 726 666
Alcohol Drug Helpline: 0800 787 797
General mental health inquiries: 0800 44 33 66
The Depression Helpline: 0800 111 757