Engineering and design firm AECOM Technology Corp. said Wednesday that it intends to go public during the second or third quarter of this year.

No indications of the amount of shares or the initial price were disclosed.

AECOM, which is based in Los Angeles and has more than 28,000 employees, had $3.4 billion in revenues last year.

The company previously filed for an IPO in February of 2002 but withdrew it without comment in April 2003. The company’s 2002 revenues were about $1.7 billion and the price of the IPO was estimated between $16 and $18.