Jabarkan Pendidikan dari Rekson Silaban

Sarjana Ekonomi Universitas Simalungun Sumatera Utara

Pasca Sarjana Manajemen Universitas Negeri Jakarta

Non degree: International Labor Standards, International Institute of Worker Education, Ternood, Belgium 2005-2006

Dewan Pengawas BPJS Ketenagakerjaan 2016 – 2021

General Council of International Trade Union Confederation (ITUC), Brussels 2005-2015

Dewan pengarah (Governing Body for International Labor Organization, ILO) Geneva, Swiss 2005-2014

Direktur Indonesia Labor Institute sampai 2015

Ketua MPO KSBSI 2019 - 2023

Ketua Umum Perkumpulan Senior GMKI 2002-2015

Executive Board Word Confederation of Labor (WCL) 2002-2007

Ketua GMKI Pematang Siantar 1990-1992