Lord Wormald became the shortest-serving cabinet secretary in the history of the post when he left in February.
Women say pension delays are causing further financial stress after losing their husbands.
Jayne Brady sent an email to NI Civil Service staff on Wednesday as she launched a "scoping exercise" after Jeffrey Donaldson's conviction.
Alison Williams says she still has not received her money as Capita misses a government deadline.
Pension payments have been delayed after Capita took over administration of the civil servants' scheme.
Alison Williams, from Jarrow, says she is out of pocket as Capita grapple with a backlog of cases.
Civil servants from Charlwood and Fetcham say they have been hit by delays in pension payments.
Dame Antonia will be the first woman to hold the post and replaces Sir Chris Wormald as the UK's top civil servant.
Claims emerge after the Cabinet Office said there was only one complaint about Antonia Romeo's conduct which was dismissed after an inquiry.
