Colin Shears & Associates phone 29 Yaralla Crs Thornleigh, New South Wales 2120 map Gryphon Systems Engineering Pty Ltd phone 24 Adamson Ave Thornleigh, New South Wales 2120 map if (!IN_DEV) { ?> } ?> Richard Duggan Pty Ltd Consulting Engineers phone Suite 18, 265- 271 Pennant Hills Rd Thornleigh, New South Wales 2120 map