Forces TV a media outlet for the UK military in March this year ran an article on a Satanist member of the Church of Satan who worked in the British navy. Chris Cranmer had his religion and right to practice as a Satanist in rituals on navy ships registered in 2004 including a Satanic ritual for his burial at sea if he were to be killed in action.
At the time politicians, admirals and Christian religious figures complained, but Cranmer has been recognised for his work ethic and promoted to a position in the Military of Defence.
The UK military has a vigorous selection policy which weeds out those unsuited to a role in the military, but for those with the right skill set and attitude, their religion of Satanism would not bar them from service or promotion in the military. The UK laws also now protects Satanists from discrimination based upon their religion. Generally those that have issues with Satanists in the military are pandering to subjective folk tales that cast Satanism in a negative light based upon Christian and Hollywood stereotypes.
In the US military Michael Aquino rose to the rank of Lieutenant colonel, and made a significant contribution to military intelligence philosophy despite Christian evangelists working hard to destroy his career.
The few individuals who do publically identify themselves in the military as Satanists have proven to be excellent and dedicated military officers, and have a good track record in their careers. Indeed, the military would benefit from a study of the qualities of Satanists that make them excellent military officers, then make greater efforts to recruit them to the services.