Three are masters of all they survey.
The success of Guy Sampson, Robert Moore and Michael Bell, bring the number of RICS accredited surveyors at the firm to 27, largest employer of RICS-accredited rural surveyors in the region.
The APC, which takes around two years to complete, demonstrates a high level of academic knowledge along with practical knowledge and hands-on experience.
Candidates have to submit a thesis and undergo a rigorous panel interview for their final assessment. Generally, the course has a two-thirds pass rate.
Hugh Fell, senior partner at George F White, said: "We pride ourselves on the excellent career opportunities we offer our staff and always encourage and support individuals to reach their full potential so we can offer the best level of expertise to our clients.
Guy, Robert and Michael are hardworking, excellent at their jobs, and well-liked in the rural community. "They're a credit to George F White and we're delighted they've achieved RICS accreditation."
Meanwhile, Smiths Gore has appointed Duncan Winspear to head its new farm management department in Corbridge.
Previously based in York, Newcastle University graduate Mr Winspear will shortly be joined in Corbridge by Richard Cantillon from the firm's Dumfries office.
Smiths Gore partner Michael Orde said: "Duncan has been with Smiths Gore now for a number of years, and he is exactly the right person to be taking our new farm management and consultancy operation based in Corbridge forward.
"He is well known within the sector, with an excellent reputation, and already has a strong client portfolio which we expect to grow with the expansion of the department that he is now leading in Northumberland."
SUCCESS Guy Sampson, Robert Moore and Michael Bell have all achieved their Assessment of Professional Competence