Information for Albert Schweitzer Foundation

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Basic information

Item Value

Staff count by year

Hover over a name to see the position and date range. This table only includes positions where at least the start date is known. The positions count can count the same person multiple times if they held different positions. For each year, a person is included if they were at the organization for any part of the year; this means the actual staff count at any point during the year can be lower.

Year Positions count Researchers General staff Associates Board members Advisors
2009 1 Mahi Klosterhalfen
2010 2 Mahi Klosterhalfen, Silja Kallsen-MacKenzie
2011 3 Mahi Klosterhalfen, Robin Rader, Silja Kallsen-MacKenzie
2012 9 Mahi Klosterhalfen, Mahi Klosterhalfen, Mahi Klosterhalfen, Rolf Hohensee, Silja Kallsen-MacKenzie, Wolfgang Schindler Christoph Maisack, Erich Gräßer, Hans Hinrich Sambraus
2013 14 Hans-Georg Kluge, Luisa Böhle, Mahi Klosterhalfen, Mahi Klosterhalfen, Mahi Klosterhalfen, Robin Rader, Rolf Hohensee, Silja Kallsen-MacKenzie, Wolfgang Schindler Christoph Maisack, Erich Gräßer, Hans Hinrich Sambraus, Kurt Schmidinger, Markus Keller
2014 14 Hans-Georg Kluge, Luisa Böhle, Mahi Klosterhalfen, Mahi Klosterhalfen, Mahi Klosterhalfen, Robin Rader, Rolf Hohensee, Silja Kallsen-MacKenzie, Wolfgang Schindler Christoph Maisack, Erich Gräßer, Hans Hinrich Sambraus, Kurt Schmidinger, Markus Keller
2015 15 Hans-Georg Kluge, Inken Jakob-Thome, Luisa Böhle, Mahi Klosterhalfen, Mahi Klosterhalfen, Mahi Klosterhalfen, Robin Rader, Rolf Hohensee, Silja Kallsen-MacKenzie, Wolfgang Schindler Christoph Maisack, Erich Gräßer, Hans Hinrich Sambraus, Kurt Schmidinger, Markus Keller
2016 17 Anna Stief Hans-Georg Kluge, Inken Jakob-Thome, Janika Kleine, Luisa Böhle, Mahi Klosterhalfen, Mahi Klosterhalfen, Mahi Klosterhalfen, Robin Rader, Rolf Hohensee, Silja Kallsen-MacKenzie, Wolfgang Schindler Christoph Maisack, Erich Gräßer, Hans Hinrich Sambraus, Kurt Schmidinger, Markus Keller
2017 20 Anna Stief Anna Stief, Ewa Prokopiak, Hans-Georg Kluge, Inken Jakob-Thome, Janika Kleine, Luisa Böhle, Mahi Klosterhalfen, Mahi Klosterhalfen, Mahi Klosterhalfen, Robin Rader, Rolf Hohensee, Silja Kallsen-MacKenzie, Wolfgang Schindler Christoph Maisack, Erich Gräßer, Hans Hinrich Sambraus, Kurt Schmidinger, Markus Keller, Silja Kallsen-MacKenzie
2018 20 Anna Stief, Anne Schäfer, Ewa Prokopiak, Hans-Georg Kluge, Inken Jakob-Thome, Janika Kleine, Jonas Becker, Luisa Böhle, Mahi Klosterhalfen, Mahi Klosterhalfen, Mahi Klosterhalfen, Robin Rader, Rolf Hohensee, Wolfgang Schindler Christoph Maisack, Erich Gräßer, Hans Hinrich Sambraus, Kurt Schmidinger, Markus Keller, Silja Kallsen-MacKenzie
2019 23 Anna Stief, Anne Schäfer, Anne Schäfer, Diana von Webel, Ewa Prokopiak, Hans-Georg Kluge, Inken Jakob-Thome, Janika Kleine, Jonas Becker, Luisa Böhle, Mahi Klosterhalfen, Mahi Klosterhalfen, Mahi Klosterhalfen, Robin Rader, Rolf Hohensee, Stephanie Knabe, Wolfgang Schindler Christoph Maisack, Erich Gräßer, Hans Hinrich Sambraus, Kurt Schmidinger, Markus Keller, Silja Kallsen-MacKenzie
2020 61 Eva Seifert, Sophie Langner, Theresa Fedder Aleksandra Furgała, André Sabosch, Andrea Broszio, Anna Stief, Anna Stief, Anna-Maria Renner, Anne Bohl-Gorny, Anne Schäfer, Anne Schäfer, Anne Schäfer, Anne Schäfer, Carsten Halmanseder, Diana von Webel, Doreen Rothe, Elisa Volkmer, Esther Rabofski, Esther Rabofski, Ewa Prokopiak, Florian Witkowski, Hans-Georg Kluge, Henner Brünjes, Inken Jakob-Thome, Janika Kleine, Jennifer Wilke, Jennifer Wilke, Jonas Becker, Kai Tittmann, Karolina Kunda-Kuwieckij, Konstantinos Tsilimekis, Lina Petri, Linda Eickelau, Loretta Schulte, Luisa Böhle, Luisa Böhle, Mahi Klosterhalfen, Mahi Klosterhalfen, Mahi Klosterhalfen, Mareike Klinger-Strobel, Marietheres Reinke, Martin Brandenburg, Michelle Pliquett, Milena Henn, Natascha Brecht, Nele Köster, Rieke Petter, Robin Rader, Robin Rader, Rolf Hohensee, Sabrina Grela, Silja Kallsen-MacKenzie, Stephanie Knabe, Ulf Jürgens, Wolfgang Schindler Christoph Maisack, Erich Gräßer, Hans Hinrich Sambraus, Kurt Schmidinger, Markus Keller
2021 63 Eva Seifert, Florian Werner, Sophie Langner, Theresa Fedder Aleksandra Furgała, André Sabosch, Andrea Broszio, Anna Stief, Anna Stief, Anna-Maria Renner, Anne Bohl-Gorny, Anne Schäfer, Anne Schäfer, Carsten Halmanseder, Corinna Schumann, Diana von Webel, Doreen Rothe, Elisa Volkmer, Esther Rabofski, Esther Rabofski, Ewa Prokopiak, Felice Lewandowski, Florian Witkowski, Hans-Georg Kluge, Henner Brünjes, Inken Jakob-Thome, Janika Kleine, Jennifer Wilke, Jennifer Wilke, Jonas Becker, Kai Tittmann, Karolina Kunda-Kuwieckij, Konstantinos Tsilimekis, Lea Tahnee Budna, Lina Petri, Linda Eickelau, Loretta Schulte, Luisa Böhle, Mahi Klosterhalfen, Mahi Klosterhalfen, Mahi Klosterhalfen, Mareike Klinger-Strobel, Marietheres Reinke, Martin Brandenburg, Michelle Pliquett, Milena Henn, Natascha Brecht, Nele Köster, Rieke Petter, Robin Rader, Robin Rader, Rolf Hohensee, Sabrina Grela, Silja Kallsen-MacKenzie, Stephanie Knabe, Sylvi Paulick, Ulf Jürgens, Wolfgang Schindler Christoph Maisack, Erich Gräßer, Hans Hinrich Sambraus, Kurt Schmidinger, Markus Keller
2022 63 Eva Seifert, Florian Werner, Sophie Langner, Theresa Fedder Aleksandra Furgała, André Sabosch, Andrea Broszio, Anna Stief, Anna Stief, Anna-Maria Renner, Anne Bohl-Gorny, Anne Schäfer, Anne Schäfer, Carsten Halmanseder, Corinna Schumann, Diana von Webel, Doreen Rothe, Elisa Volkmer, Esther Rabofski, Esther Rabofski, Ewa Prokopiak, Felice Lewandowski, Florian Witkowski, Hans-Georg Kluge, Henner Brünjes, Inken Jakob-Thome, Janika Kleine, Jennifer Wilke, Jennifer Wilke, Jonas Becker, Kai Tittmann, Karolina Kunda-Kuwieckij, Konstantinos Tsilimekis, Lea Tahnee Budna, Lina Petri, Linda Eickelau, Loretta Schulte, Luisa Böhle, Mahi Klosterhalfen, Mahi Klosterhalfen, Mahi Klosterhalfen, Mareike Klinger-Strobel, Marietheres Reinke, Martin Brandenburg, Michelle Pliquett, Milena Henn, Natascha Brecht, Nele Köster, Rieke Petter, Robin Rader, Robin Rader, Rolf Hohensee, Sabrina Grela, Silja Kallsen-MacKenzie, Stephanie Knabe, Sylvi Paulick, Ulf Jürgens, Wolfgang Schindler Christoph Maisack, Erich Gräßer, Hans Hinrich Sambraus, Kurt Schmidinger, Markus Keller

Number of full-time staff at the beginning each year

The following table lists some dates and people who were at the organization on the given date (namely, the start of the year). The table may not list every person who worked for the organization (e.g. they could have joined and left in the middle of a single year). This table excludes associates, interns, advisors, and board members.

Date Staff count Staff
2009-01-01 1 Mahi Klosterhalfen
2010-01-01 1 Mahi Klosterhalfen
2011-01-01 2 Mahi Klosterhalfen, Silja Kallsen-MacKenzie
2012-01-01 2 Mahi Klosterhalfen, Silja Kallsen-MacKenzie
2013-01-01 7 Mahi Klosterhalfen, Mahi Klosterhalfen, Mahi Klosterhalfen, Robin Rader, Rolf Hohensee, Silja Kallsen-MacKenzie, Wolfgang Schindler
2014-01-01 9 Hans-Georg Kluge, Luisa Böhle, Mahi Klosterhalfen, Mahi Klosterhalfen, Mahi Klosterhalfen, Robin Rader, Rolf Hohensee, Silja Kallsen-MacKenzie, Wolfgang Schindler
2015-01-01 10 Hans-Georg Kluge, Inken Jakob-Thome, Luisa Böhle, Mahi Klosterhalfen, Mahi Klosterhalfen, Mahi Klosterhalfen, Robin Rader, Rolf Hohensee, Silja Kallsen-MacKenzie, Wolfgang Schindler
2016-01-01 10 Hans-Georg Kluge, Inken Jakob-Thome, Luisa Böhle, Mahi Klosterhalfen, Mahi Klosterhalfen, Mahi Klosterhalfen, Robin Rader, Rolf Hohensee, Silja Kallsen-MacKenzie, Wolfgang Schindler
2017-01-01 12 Anna Stief, Hans-Georg Kluge, Inken Jakob-Thome, Janika Kleine, Luisa Böhle, Mahi Klosterhalfen, Mahi Klosterhalfen, Mahi Klosterhalfen, Robin Rader, Rolf Hohensee, Silja Kallsen-MacKenzie, Wolfgang Schindler
2018-01-01 13 Anna Stief, Anne Schäfer, Ewa Prokopiak, Hans-Georg Kluge, Inken Jakob-Thome, Janika Kleine, Luisa Böhle, Mahi Klosterhalfen, Mahi Klosterhalfen, Mahi Klosterhalfen, Robin Rader, Rolf Hohensee, Wolfgang Schindler
2019-01-01 15 Anna Stief, Anne Schäfer, Anne Schäfer, Ewa Prokopiak, Hans-Georg Kluge, Inken Jakob-Thome, Janika Kleine, Jonas Becker, Luisa Böhle, Mahi Klosterhalfen, Mahi Klosterhalfen, Mahi Klosterhalfen, Robin Rader, Rolf Hohensee, Wolfgang Schindler
2020-01-01 17 Anna Stief, Anne Schäfer, Anne Schäfer, Diana von Webel, Ewa Prokopiak, Hans-Georg Kluge, Inken Jakob-Thome, Janika Kleine, Jonas Becker, Luisa Böhle, Mahi Klosterhalfen, Mahi Klosterhalfen, Mahi Klosterhalfen, Robin Rader, Rolf Hohensee, Stephanie Knabe, Wolfgang Schindler
2021-01-01 52 Aleksandra Furgała, André Sabosch, Andrea Broszio, Anna Stief, Anna Stief, Anna-Maria Renner, Anne Bohl-Gorny, Anne Schäfer, Anne Schäfer, Carsten Halmanseder, Diana von Webel, Doreen Rothe, Elisa Volkmer, Esther Rabofski, Esther Rabofski, Eva Seifert, Ewa Prokopiak, Florian Witkowski, Hans-Georg Kluge, Henner Brünjes, Inken Jakob-Thome, Janika Kleine, Jennifer Wilke, Jennifer Wilke, Jonas Becker, Kai Tittmann, Karolina Kunda-Kuwieckij, Konstantinos Tsilimekis, Lina Petri, Linda Eickelau, Loretta Schulte, Luisa Böhle, Mahi Klosterhalfen, Mahi Klosterhalfen, Mahi Klosterhalfen, Mareike Klinger-Strobel, Marietheres Reinke, Martin Brandenburg, Michelle Pliquett, Milena Henn, Natascha Brecht, Nele Köster, Rieke Petter, Robin Rader, Robin Rader, Rolf Hohensee, Sabrina Grela, Sophie Langner, Stephanie Knabe, Theresa Fedder, Ulf Jürgens, Wolfgang Schindler
2022-01-01 57 Aleksandra Furgała, André Sabosch, Andrea Broszio, Anna Stief, Anna Stief, Anna-Maria Renner, Anne Bohl-Gorny, Anne Schäfer, Anne Schäfer, Carsten Halmanseder, Corinna Schumann, Diana von Webel, Doreen Rothe, Elisa Volkmer, Esther Rabofski, Esther Rabofski, Eva Seifert, Ewa Prokopiak, Felice Lewandowski, Florian Werner, Florian Witkowski, Hans-Georg Kluge, Henner Brünjes, Inken Jakob-Thome, Janika Kleine, Jennifer Wilke, Jennifer Wilke, Jonas Becker, Kai Tittmann, Karolina Kunda-Kuwieckij, Konstantinos Tsilimekis, Lea Tahnee Budna, Lina Petri, Linda Eickelau, Loretta Schulte, Luisa Böhle, Mahi Klosterhalfen, Mahi Klosterhalfen, Mahi Klosterhalfen, Mareike Klinger-Strobel, Marietheres Reinke, Martin Brandenburg, Michelle Pliquett, Milena Henn, Natascha Brecht, Nele Köster, Rieke Petter, Robin Rader, Robin Rader, Rolf Hohensee, Sabrina Grela, Sophie Langner, Stephanie Knabe, Sylvi Paulick, Theresa Fedder, Ulf Jürgens, Wolfgang Schindler

Full history of additions and subtractions

This table shows the full change history of positions. Each row corresponds to at least one addition or removal of a position. Additions are in green and subtractions are in red. If a position name changed, it is listed simultaneously as an addition (of the new name) and removal (of the old name) and colored yellow. Additionally there are faded variants of each color for visited links.

Date Number of positions Number of positions added Number of positions removed Positions added Positions removed
2009-01-01 1 1 0 Mahi Klosterhalfen
2010-06-01 2 1 0 Silja Kallsen-MacKenzie
2010-12-01 1 0 -1 Silja Kallsen-MacKenzie
2011-01-01 2 1 0 Silja Kallsen-MacKenzie
2011-06-01 3 1 0 Robin Rader
2011-12-01 1 0 -2 Robin Rader, Silja Kallsen-MacKenzie
2012-01-01 2 1 0 Silja Kallsen-MacKenzie
2012-05-01 9 7 0 Christoph Maisack, Erich Gräßer, Hans Hinrich Sambraus, Mahi Klosterhalfen, Mahi Klosterhalfen, Rolf Hohensee, Wolfgang Schindler
2013-01-01 10 1 0 Robin Rader
2013-07-01 13 3 0 Hans-Georg Kluge, Kurt Schmidinger, Markus Keller
2013-11-01 14 1 0 Luisa Böhle
2015-01-01 15 1 0 Inken Jakob-Thome
2016-08-01 16 1 0 Anna Stief
2016-09-01 17 1 0 Janika Kleine
2017-07-01 16 0 -1 Silja Kallsen-MacKenzie
2017-08-01 18 2 0 Ewa Prokopiak, Silja Kallsen-MacKenzie
2017-09-01 17 0 -1 Anna Stief
2017-10-01 18 1 0 Anna Stief
2018-01-01 19 1 0 Anne Schäfer
2018-09-01 20 1 0 Jonas Becker
2019-01-01 21 1 0 Anne Schäfer
2019-02-01 20 0 -1 Silja Kallsen-MacKenzie
2019-05-01 21 1 0 Diana von Webel
2019-08-01 22 1 0 Stephanie Knabe
2020-03-01 22 3 -3 Anne Schäfer, Luisa Böhle, Silja Kallsen-MacKenzie Anne Schäfer, Anne Schäfer, Luisa Böhle
2020-06-01 23 1 0 Milena Henn
2020-07-01 24 1 0 Esther Rabofski
2020-08-01 58 34 0 Aleksandra Furgała, Andrea Broszio, André Sabosch, Anna Stief, Anna-Maria Renner, Anne Bohl-Gorny, Anne Schäfer, Carsten Halmanseder, Doreen Rothe, Elisa Volkmer, Esther Rabofski, Eva Seifert, Florian Witkowski, Henner Brünjes, Jennifer Wilke, Jennifer Wilke, Kai Tittmann, Karolina Kunda-Kuwieckij, Konstantinos Tsilimekis, Lina Petri, Linda Eickelau, Loretta Schulte, Mareike Klinger-Strobel, Marietheres Reinke, Martin Brandenburg, Michelle Pliquett, Natascha Brecht, Nele Köster, Rieke Petter, Robin Rader, Sabrina Grela, Sophie Langner, Theresa Fedder, Ulf Jürgens
2021-08-01 63 5 0 Corinna Schumann, Felice Lewandowski, Florian Werner, Lea Tahnee Budna, Sylvi Paulick

List of people (72 positions)

Person Title Start date End date Employment type Source Notes
Wolfgang Schindler Director 2012-05-01 [1]
Mahi Klosterhalfen Director 2012-05-01 [1]
Mahi Klosterhalfen Management & Administration President (team Germany) 2012-05-01 [2]
Rolf Hohensee Director 2012-05-01 [1]
Erich Gräßer Scientific Advisory Board 2012-05-01 advisor [1]
Christoph Maisack Scientific Advisory Board 2012-05-01 advisor [1]
Hans Hinrich Sambraus Scientific Advisory Board 2012-05-01 advisor [1]
Hans-Georg Kluge Director 2013-07-01 [3]
Markus Keller Scientific Advisory Board 2013-07-01 advisor [3]
Kurt Schmidinger Scientific Advisory Board 2013-07-01 advisor [3]
Mahi Klosterhalfen President (team Germany) 2009-01-01 [4], [5]
Konstantinos Tsilimekis COO (team Germany) 2020-08-01 [4]
Andrea Broszio Assistant to the President and Office Management (team Germany) 2020-08-01 [4]
Stephanie Knabe Financial Management (team Germany) 2019-08-01 [4], [6]
Anne Schäfer Human Resources (team Germany) 2020-08-01 [4]
Anne Schäfer SpenderInnen-Service; Fundraising (team Germany) 2018-01-01 2020-03-01 [7]
Anne Schäfer Personalverwaltung & management (team Germany) 2019-01-01 2020-03-01 [7]
Anne Schäfer Abteilungsleitung Personal (team Germany) 2020-03-01 [7]
Anne Bohl-Gorny Knowledge Management (team Germany) 2020-08-01 [4]
Sabrina Grela Quality Management (team Germany) 2020-08-01 [4]
Ulf Jürgens Knowledge Management (team Germany) 2020-08-01 [4]
Michelle Pliquett Knowledge Management and Evaluation (team Germany) 2020-08-01 [4]
André Sabosch IT Director (team Germany) 2020-08-01 [4]
Martin Brandenburg IT Administration (team Germany) 2020-08-01 [4]
Henner Brünjes Webmaster (team Germany) 2020-08-01 [4]
Diana von Webel Comunications Director (team Germany) 2019-05-01 [4], [8]
Nele Köster Vegan Taste Week Editor (team Germany) 2020-08-01 [4]
Lina Petri Editor (team Germany) 2020-08-01 [4]
Rieke Petter Management of Vegan Taste Week, Editor (team Germany) 2020-08-01 [4]
Jennifer Wilke Social media and Online Editor (team Germany) 2020-08-01 [4]
Jennifer Wilke Communications Editor (team Germany) 2020-08-01 [2]
Florian Witkowski Graphic Designer (team Germany) 2020-08-01 [4]
Carsten Halmanseder Campaigns Director (team Germany) 2020-08-01 [4]
Jonas Becker Consumer & Corporate Campaigns (team Germany) 2018-09-01 [4], [9]
Natascha Brecht Consumer & Corporate Campaigns (team Germany) 2020-08-01 [4]
Anna-Maria Renner Consumer & Corporate Campaigns (team Germany) 2020-08-01 [4]
Kai Tittmann Consumer & Corporate Campaigns (team Germany) 2020-08-01 [4]
Elisa Volkmer Consumer & Corporate Campaigns (team Germany) 2020-08-01 [4]
Linda Eickelau Campaigns & Volunteer Management (team Germany) 2020-08-01 volunteer [4]
Doreen Rothe Campaigns & Volunteer Management (team Germany) 2020-08-01 volunteer [4]
Mareike Klinger-Strobel Campaigns & Volunteer Management (team Germany) 2020-08-01 volunteer [4]
Marietheres Reinke Animal Welfare Director (team Germany) 2020-08-01 [4]
Sophie Langner Research (team Germany) 2020-08-01 [4]
Eva Seifert Research (team Germany) 2020-08-01 [4]
Luisa Böhle Corporate Outreach Director (team Germany) 2013-11-01 2020-03-01 [4], [10]
Luisa Böhle Director of Corporate Outreach Germany (team Germany) 2020-03-01 full-time [10]
Theresa Fedder Corporate Outreach Director Research (team Germany) 2020-08-01 [4]
Inken Jakob-Thome Corporate Relations Manager (team Germany) 2015-01-01 [4], [11]
Janika Kleine Animal Welfare and Vegan Projects (team Germany) 2016-09-01 [4], [12]
Robin Rader Animal Welfare and Vegan Projects (team Germany) 2020-08-01 [4]
Robin Rader Campaigner (team Germany) 2011-06-01 2011-12-01 [13]
Robin Rader Corporate Relations Manager Corporate Outreach (team Germany) 2013-01-01 [13]
Anna Stief Animal Welfare and Vegan Projects (team Germany) 2020-08-01 [4]
Anna Stief Research (team Germany) 2016-08-01 2017-09-01 [14]
Anna Stief Corporate Relations Manager (team Germany) 2017-10-01 [14]
Loretta Schulte Corporate Outreach Specialist (team Germany) 2020-08-01 full-time [4], [15]
Esther Rabofski Animal Welfare and Vegan Projects (team Germany) 2020-08-01 [4]
Esther Rabofski Corporate Outreach Manager (team Germany) 2020-07-01 [16]
Silja Kallsen-MacKenzie Internationalization Director (team Germany) 2020-03-01 [4], [17]
Silja Kallsen-MacKenzie Executive Assistant to the CEO (team Germany) 2010-06-01 2010-12-01 full-time [17]
Silja Kallsen-MacKenzie Food Business Manager (team Germany) 2011-01-01 2011-12-01 full-time [17]
Silja Kallsen-MacKenzie Director of Corporate Outreach (team Germany) 2012-01-01 2017-07-01 full-time [17]
Silja Kallsen-MacKenzie Director of Corporate Outreach Germany & Poland, Board Member of Fundacja Alberta Schweitzera (team Germany) 2017-08-01 2019-02-01 full-time [17]
Ewa Prokopiak Corporate Relations Manager (team Poland) 2017-08-01 [18], [19]
Karolina Kunda-Kuwieckij Communication & Campaigns Manager (team Poland) 2020-08-01 [18]
Aleksandra Furgała Office Assistant (team Poland) 2020-08-01 [18]
Sylvi Paulick Management & Administration Assessor (team Germany) 2021-08-01 [2]
Lea Tahnee Budna Vegan Taste Week Editor (team Germany) 2021-08-01 [2]
Milena Henn Social Media & Newsletters (team Germany) 2020-06-01 [2], [20]
Felice Lewandowski Consumer & Corporate Campaigns (team Germany) 2021-08-01 [2]
Corinna Schumann Consumer & Corporate Campaigns (team Germany) 2021-08-01 [2]
Florian Werner Corporate Outreach Research (team Germany) 2021-08-01 [2]

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