If he's referring to technician in the sense of a biology laboratory, then that's someone hired, usually with either a bachelor's or master's degree, who carries out the routine work in the lab (some universities give them the title "Research Assistant"). Their role generally includes making common reagents, such as buffer solutions, assisting with certain procedures (for example, we have a technician who primarily does our electron microscopy work), ordering supplies, keeping the lab clean, etc.
They are not usually cited as authors on papers because they do not contribute ideas to the work, nor are they responsible for the analysis, interpretation or writing of the paper. They are usually recognized in the acknowledgments for their help. Generally, their most important job skill is to follow instructions carefully and consistently.
However, if someone is fortunate enough to have a technician who has a lot of experience and interest in the work, sometimes they do begin to contribute original ideas to the project and are given more of a primary role in conducting it and making decisions about it, in which case, they do get cited as a co-author (and soon after, submit their resignation because they've finally decided to go to grad school...someone with that level of curiosity isn't satisfied to remain a technician for long).
The real distinction comes about as level of interest more than anything else. Most technicians I've worked with could have gone on for a PhD or could have contributed more to a project, but they just don't have that desire or level of interest in the project or the curiosity to want to really understand the scientific questions involved; they are content to show up for their 8 to 5 job and follow the instructions given to them each day.
Other than that, they are still valued members of the lab team environment. In fact, new students often are learning from the technician initially, at least when it comes to the "how to" type questions (the "why" questions are reserved for their mentor).