1) Asker 2) Canvasser 3) Enquirer 4) Exit person 5) Gallup 6) Gallup employee 7) Gallup staffer 8) Gallup, Harris or Roper 9) Headcounter 10) Inquirer 11) One asking for opinions 12) One assessing public opinion 13) One assessing sentiment 14) Opinion gatherer 15) Person with opinions 16) Poll taker 1) Head counter 2) Researcher 
[n] - someone who conducts surveys of public opinion
poll taker noun someone who conducts surveys of public opinion; `a pollster conducts public opinion polls`; `a headcounter counts heads`