Lambert's primary task was to direct construction work at the T4 killing centres, particularly the construction of gas chambers and crematoria.
 In testimony Lambert claimed that he merely erected room dividers and installed doors, a claim largely discredited.
Since Brandenburg and Grafeneck had already been completed before Lambert joined the T4 program, he worked at Hartheim, Sonnenstein, Bernburg, and Hadamar as the program's "expert for the construction of gas chambers".

After T4's termination, Lambert was posted to Operation Reinhard in Lublin reservation for the purpose of bricklaying assignments which constructed the gas chambers in Sobibór and Treblinka extermination camps.
At Lublin Lambert joined the SS.
During this time, however, his work was often interrupted for further construction jobs in Germany and Austria involving the still-ongoing Action 14f13.
With the help of Ukrainian volunteers, and condemned Jewish prisoners, Lambert constructed solid gassing facilities at Sobibor and Treblinka: "Using his expert knowledge about gassing installations, Lambert was able rapidly to complete all work on the big gas house [in Treblinka]".

During his testimony at the Sobibór trial in Hagen, Germany (whose lead defendant was Kurt Bolender), lasting from 6 September 1965 until 20 December 1966, Lambert stated:
I was in the extermination camp of Jews for about two to three weeks.
It was sometime in autumn 1942, but I don’t remember exactly when.
At that time I was assigned by Wirth to enlarge the gassing structure according to the model of Treblinka.

I went to Sobibor together with Lorenz Hackenholt, who was at that time in Treblinka.
First of all, I went with Hackenholt to a sawmill near Warsaw.
There Hackenholt ordered a big consignment of wood for reconstruction in Sobibor.

Finally, both of us went to Sobibor.
We reported there to the camp commander, Reichleitner.
He gave us the exact directives for the construction of the gassing installations.
 The camp was already in operation, and there was a gassing installation.
 Probably the old installation was not big enough, and reconstruction was necessary.

Today I cannot tell exactly who participated in the reconstruction work.
However, I do remember that Jewish prisoners and so-called Askaries (Ukrainian auxiliaries) took part in the work.


During this time that building was in progress, no transports with Jews arrived.

In addition, Lambert directed construction at several nearby forced labour camps such as Dohorucza and the Poniatowa concentration camp.
Reportedly, Lambert attempted to remain an uninvolved expert devoted solely to his work and not interested in the conditions which surrounded it.
 According to one survivor, Jankiel Wiernik, Lambert avoided looking at dead bodies and treated his Jewish work crew in a professional manner.

Unterscharführer Herman  [sic] was humane and likeable.
 He understood us and was considerate of us.
When he first entered Camp II and saw the piles [of bodies] that had been suffocated by the gas, he was stunned.
 He turned pale and a frightened look of suffering fell over his face.
He quickly took me from the place so as not to see what was going on.
With regard to us, the workers, he treated us very well.
Frequently he would bring us food on the side from the German kitchen.
In his eyes one could see his good-heartedness... but he feared his friends.
All his deeds and movements expressed his gentle soul.

At the conclusion of Operation Reinhard, Lambert was posted to Trieste, where he continued installing cremation facilities at the concentration camp Risiera di San Sabba.

After the war, Lambert was arrested on 28 March 1962.
At the First Treblinka Trial in 1965, Lambert was tried for the first time and sentenced to four years' imprisonment for aiding and abetting the murder of at least 300,000 people.
 Having already served this time, he was allowed to live as a free man.
At the Sobibór Trial in 1966, Lambert was acquitted.
At the trials Lambert denied involvement in the killing operation and claimed that he merely suspected that the bu
Lambert's primary task was to direct construction work at the T4 killing centres, particularly the construction of gas chambers and crematoria.  In testimony Lambert claimed that he merely erected room dividers and installed doors, a claim largely discredited. Since Brandenburg and Grafeneck had already been completed before Lambert joined the T4 program, he worked at Hartheim, Sonnenstein, Bernburg, and Hadamar as the program's "expert for the construction of gas chambers".
After T4's termination, Lambert was posted to Operation Reinhard in Lublin reservation for the purpose of bricklaying assignments which constructed the gas chambers in Sobibór and Treblinka extermination camps. At Lublin Lambert joined the SS. During this time, however, his work was often interrupted for further construction jobs in Germany and Austria involving the still-ongoing Action 14f13. With the help of Ukrainian volunteers, and condemned Jewish prisoners, Lambert constructed solid gassing facilities at Sobibor and Treblinka: "Using his expert knowledge about gassing installations, Lambert was able rapidly to complete all work on the big gas house [in Treblinka]".
During his testimony at the Sobibór trial in Hagen, Germany (whose lead defendant was Kurt Bolender), lasting from 6 September 1965 until 20 December 1966, Lambert stated:
I was in the extermination camp of Jews for about two to three weeks. It was sometime in autumn 1942, but I don’t remember exactly when. At that time I was assigned by Wirth to enlarge the gassing structure according to the model of Treblinka.
I went to Sobibor together with Lorenz Hackenholt, who was at that time in Treblinka. First of all, I went with Hackenholt to a sawmill near Warsaw. There Hackenholt ordered a big consignment of wood for reconstruction in Sobibor.
Finally, both of us went to Sobibor. We reported there to the camp commander, Reichleitner. He gave us the exact directives for the construction of the gassing installations.  The camp was already in operation, and there was a gassing installation.  Probably the old installation was not big enough, and reconstruction was necessary.
Today I cannot tell exactly who participated in the reconstruction work. However, I do remember that Jewish prisoners and so-called Askaries (Ukrainian auxiliaries) took part in the work.

During this time that building was in progress, no transports with Jews arrived.
In addition, Lambert directed construction at several nearby forced labour camps such as Dohorucza and the Poniatowa concentration camp. Reportedly, Lambert attempted to remain an uninvolved expert devoted solely to his work and not interested in the conditions which surrounded it.  According to one survivor, Jankiel Wiernik, Lambert avoided looking at dead bodies and treated his Jewish work crew in a professional manner.
Unterscharführer Herman  [sic] was humane and likeable.  He understood us and was considerate of us. When he first entered Camp II and saw the piles [of bodies] that had been suffocated by the gas, he was stunned.  He turned pale and a frightened look of suffering fell over his face. He quickly took me from the place so as not to see what was going on. With regard to us, the workers, he treated us very well. Frequently he would bring us food on the side from the German kitchen. In his eyes one could see his good-heartedness... but he feared his friends. All his deeds and movements expressed his gentle soul.
At the conclusion of Operation Reinhard, Lambert was posted to Trieste, where he continued installing cremation facilities at the concentration camp Risiera di San Sabba.
After the war, Lambert was arrested on 28 March 1962. At the First Treblinka Trial in 1965, Lambert was tried for the first time and sentenced to four years' imprisonment for aiding and abetting the murder of at least 300,000 people.  Having already served this time, he was allowed to live as a free man. At the Sobibór Trial in 1966, Lambert was acquitted. At the trials Lambert denied involvement in the killing operation and claimed that he merely suspected that the bu
Erwin Lambert