Found this by accident:
https://www.arcadeattack.co.uk/podcast-february-1-2020/

He has a bit of business man mentality, maybe thats why Quake has been given a bit secondary treatment with outsourcing q4 and qc, but gotta still give credit to him for Q2DM1 and Q3DM6 also Q1DM6, I think all three games would have suffered without these maps.