Drummond is actively engaged in a battle against Sintraminergetica, the union which
represents its workers. In March 2009, 4000 workers peacefully protested against the poor and hazardous working conditions at Drummond’s mining sites. The strike was called because Fenoco, Drummond’s coal transport contractor, refused to negotiate a labour proposal (CBA) despite its legal obligation to bargain with the 600 union members
in addition to an on-the-job worker fatality. In response to the strike, Drummond suspended and/ or fired at least 9 workers.
Similarly, Fenoco (which is partially owned by Drummond) illegally fired 25 workers, 8 of which were union leaders. In such an atmosphere, many of the workers are afraid to join the union or to protest against the poor working conditions. Even today, coal union members are threatened; the Colombian advocate Alirio Uribe reported that several union members received invitations to their own funerals in April 2012.
 Suhner, Stefan 2010: Sicherheitsrisiken für Kohlekritiker und Gewerkschafter – ungelöste Menschenrechtsfragen in den Kohlenminen des Departement Cesar: http://www.askonline.ch/themen/wirtschaft-und-menschenrechte/bergbau-und-rohstoffkonzerne/glencore-in-kolumbien/sicherheitsrisiken-fuer-kohlekritiker-und-gewerkschafter/ (10.10.12)
 E.on Annual meeting, May 2012 http://www.kritischeaktionaere.de/fileadmin/Dokumente/Reden_2012/Rede_E.on_HV_2012_Alirio_Uribe.pdf (15.10.2012)