About us

About us.

We organise und conduct surgical missions for our team as well as for volunteering teams. One of our major interests is teaching and training of local medical personnel.

Ms Tatjana, who is based on the field at the moment arranges all necessary procedures such as communication with the local authorities as well as local hospitals and health care facilities, who host our teams during the surgical missions. She recruits and pre screens patients to be operated on by our surgical teams. Furthermore she purchases all necessary materials and drugs needed for the missions from within South Sudan and if necessary from the neighbouring countries. Materials and drugs that can not be purchased from within South Sudan and it‘s neighbouring countries will be purchased from Germany and delivered to the field.

Services we provide

The services we provide are as following:

  • Gynecological surgeries including Gynecologic oncology
  • Obstetrics
  • Vescicovaginal and rectovaginal Fistula surgeries
  • General und visceral surgery including Thyroid surgery
  • Plastic surgery


Board of Directors

Dr. Diana Joseph
Chairwoman
Obstetrician and Gynaecologist

Dr. Diana Joseph is a specialist for Obstetrics and Gynecology. She is a co-founder and the Chairwoman of “HISS”. During her residency training Dr. Joseph has completed the common trunk training in general surgery. Dr. Joseph has been conducting surgical campaigns in South Sudan with Ms. Gerber since 2015. These included general surgery, vesico-vaginal and recto-vaginal fistula campaigns as well as gynecological campaigns.



Dr. Carsten Seeschaaf
Vice-Chairman
General Practitioner

Dr. Carsten Seeschaaf is a senior resident in general medicine. He is a co-founder and the Vice Chairman of HISS.



Ms. Tatjana Gerber
Treasurer
Health coordinator for the catholic diocese in South Sudan
Registered Nurse and
Holder of BA degree in Business Administration

Ms. Tatjana Gerber is a registered nurse, she also holds a diploma in business administration. Ms. Gerber has been working in international cooperation development for the past 8 years. She has been based in South Sudan for 4 years, where she was the Matrone of one of the health facilities. Ms. Gerber is currently the medical coordinator for the catholic diocese in South Sudan. She has organized many surgical campaigns with Teams of doctors during this time. Ms. Gerber is a co-founder and treasurer of “HISS”.



Our supporting medical professionals:

Dr. Franklin Danki Sillong
Urologist and fistula Surgeon

Dr. Franklin Danki Sillong is a specialist for Urology. Dr. Sillong worked as a senior doctor in Leipzig, Germany for many years. He than moved back to Cameroon, where he developed and is now head of what has now become one of Cameroon’s largest urological hospitals.

Since 2018 Dr. Sillong has been launching fistula campaigns in South Sudan on a regular basis. The people of South Sudan is benefitting greatly from his extra ordinary expertise. We are very grateful for his excellent work and looking forward for more mutual work in future.



Dr. Thilo Schwalenberg
Urologist and fistula Surgeon General and Visceral Surgeon

Dr. Thilo Schwalenberg has a specialization in Urology as well as general and visceral surgery. Dr. Schwalenberg worked for many years as a senior doctor at a teaching hospital in Leipzig, Germany. He later on moved to Berlin, where he is currently based. With his great expertise Dr. Schwalenberg has helped developed a urological hospital in Cameroon, which has now become one of the largest in the country. In 2018 Dr. Schwalenberg participated in one of our big fistula campaigns in Wau, South Sudan. We are looking forward to more mutual work with him in the future.



Dr. Martin Frank
Senior Consultant for Maternal Health, Gynaecological Surgery and Education,

Specialist in Gynaecology and Obstetrics

Diploma in Tropical Medicine and Public Health (DTMPH)
Diploma in Education

Dr. Frank has been active as a charity worker in Madagascar for years now. His colleagues and him conduct workshops for midwives on Site on a regular basis to help train the local midwives. Find more information please visit their Website (https://fanajana.de/). We are very grateful for his support and we look forward to working with him in South Sudan as planned.



Ms. Agnes Kivumbi
Former field coordinator
Senior Mobile TB Officer
Anaesthetist/Senior Midwife

Ms. Agnes Kivumbi is an Anaesthetist and a Senior Midwife. She is also a Senior Mobile TB Officer and a former field coordinator. Ms. Kivumbi has been a health aid worker in South Sudan for the past years. She has been supporting us and participating in many of our projects since 2015.