The duo are joined by Paul Clayton who arrives as assistant manager, writes Tom Feaheny.
The Lions are also going back to being part-time.
The ex Solihull Moors and Chester boss is joined by the former Alfreton Town manager.
“We have been a long term admirer of the work Russ did at Alfreton Town along with Nicky Law in gaining promotion to the Premier Division and to the brink of League football at their peak," Douglas told the club's website.
“We are really excited to have the new management team in place as we look to get stability back into our club. We are a family club and at this point in time we need everybody connected with the club to pull together as we aim to recover from what was a really testing 12 months for the club.”