A month-long battle for control of the Finance Sector Union culminates this week with the close of postal voting for senior national and state officer positions. National secretary Julia Angrisano is under challenge from Victorian-based NAB employee Nick Perna who is promising to rein in spending and re-engage with the union's 31,236 members.Angrisano took the reins of the FSU in controversial circumstances two years ago when her predecessor Fiona Jordan was booted from office by the union's national executive.Perna is vowing to "finish the good work" that Jordan started with a pledge to transform the culture of the organisation."Four years ago members elected a national secretary on the promise of implementing change," Perna said in an emailed statement to Banking Day."Two years ago, mostly unelected union leaders forced her out."I'll finish the good work she started."Perna says the union is losing 6000 members a year, a claim that does not appear to be supported by disclosures made in the union's official returns filed to the Fair Work Commission.The runoff in FSU membership has slowed since Angrisano took the helm in the 2016 financial year.Union subscriptions fell by 1440 in the 12 months to the end of June last year, but are down 17,000 on a decade ago.Perna's critique of the current leadership appears more effective on the sensitive issue of financial management.The FSU has continued to post big deficits in recent years as it struggled to keep a lid on costs.It recorded a deficit of $539,000 in 2017 following the deficit of $2.8 million in 2016.While the balance sheet indicates the union remains financially sound with net assets of $36.7 million, Perna argues the recent financial performance is not sustainable."There is a serious disconnect between member money spent on back office expenses, and what's spent on industrial activities to protect and engage our members to make the finance industry one we can all be proud of," Perna stated in the email."I'm running on the platform to change the culture of the FSU from one of just membership sales targets, to one of engagement and on that will re-energise our member base."To do this we need to reorganise the FSU and cut the waste of member money."While the battle between Angrisano and Perna is the centrepiece of the election, a string of other positions are also being contested.Perna is backing incumbent national president Louise Arnfield who was elected unopposed at the 2014 union elections.Arnfield is under challenge from Bank SA employee Johanna Tran who is supporting Angrisano in the contest for national secretary.FSU assistant secretary Nathan Rees will be elected unopposed. The former Premier of New South Wales said his decision to join the union was influenced by the leadership demonstrated by Angrisano."Speaking personally, I wouldn't have come on board with the union if it wasn't for the leadership that Julia has showed," he told Banking Day."I'm very confident she will be re-elected because I think she is the best candidate for the job."Rees questioned Perna's attacks on the union's spending.On