專職

专 = 二 + ㇉ + ㇏ : Let's say the expert is a scientist. Also, 专 reminds me a little bit of the wheelchair symbol. Thus I choose a scientist in a wheelchair as symbol for 专.

专 = 二 + ㇉ + ㇏ : In front of the anthill, the scientist and Julian Giant Squid are focused on one thing: Electrifying the wheelchair of the scientist. Deeply concentrated they connect a capacitor to the wheelchair, which indeed starts to move a little.

职 = 只 + 耳 : James II of England (zh) has to visit the governmental office (职) in the space station's kitchen (Ø2) to ask about his taxes. There's a cuttlefish (只) on duty, and James literally has the cuttlefish's ear (耳).