Medium-sized firms with between 500 to 1,000 employees will be the most aggressive hirers in the second half of 2015, specialist recruitment firm Robert Half said in its Singapore Employment Report.

Robert Half's study found that medium-sized firms in Singapore are stepping up in their efforts to secure talent, and are also planning to hire more new employees than smaller or larger firms in the same industry.

According to the survey, 58 per cent of medium-sized firms will hire additional finance and accounting staff, and 51 per cent will be on the lookout for technology professionals.

This represents a change from the first half of 2015 when large firms were the most active hirers.

Recruitment will be most active in the banking and financial services sector, with two out of every three (66 per cent) medium-sized firms planning to employ new staff in the next six months.

Ms Stella Tang, Managing Director of Robert Half Singapore, said that medium-sized firms may be planning to grow their businesses.

"There is a strong sense of confidence among mid-sized companies right now. They are keen to make new hires to give them the capacity to seize opportunities they can see," she said.

Those who join a medium-sized firm can look forward to learning a range of skill, Ms Tang added.

"Medium-sized companies are successful companies with potential to grow more. Employees are often given a wider range of responsibilities within the company and can be promoted quickly if they perform."

The survey polled 400 senior hiring decision makers in the sectors of banking and financial services, finance and accounting, and technology and IT on their hiring intentions for the second half of 2015.