Image ADventas team

About us

Peter Langner

Founder & CEO

Peter Langner studied Computer Science at the University of Hamburg.

He became self-employed by founding ADventas Consulting GmbH in 2006. Together with his team he advises and supports your export management company in implementing S/4HANA.

Besides that Peter is SAP Mentor and head of the DSAG work group Global Trade Management.

When he is not working, Peter loves to play his guitar, read science fiction novels and to spend time with his cat Kimba on the couch.


Paul Offner

Functional Consultant SAP GTM/MM

Paul Offner studied Business Informatics and helps you by implementing and servicing your company's SAP GTM module.

Besides working at ADventas, Paul likes to play volleyball and to go to the gym. He is also on the managing-committee of the Bergstedter Schachklub and became the Jusos' beerpong champion with his brother a few years ago. Because of his fondness for home-style cooking he gets called a culinary grandma every now and then.

If he would be winning the lottery someday Paul would take that as a chance to unhurriedly study maths again.


Christopher O'Donnell

Technical Consultant SAP GTM/MM/SD

Christopher O'Donnell studied Technical Business Administration at the HAW in Hamburg with a focus on Logistics.

At ADventas he supports our team as a Functional Consultant for the modules SAP GTM, MM and SD.

Christopher is a passionate dad of twins. Besides that he enjoys going to the cinema, reading a lot of books and he is a football enthusiast carrying the rhombus in his heart.


Dr. Lawrence Cabac

Technical Consultant SAP GTM/MM/SD

Dr. Lawrence Cabac studied Computer Science at the University of Hamburg Informatik and also did his PhD there.

He supports our team as a Technical Consultant for SAP GTM, MM and SD.


Timo John

Technical Consultant SAP GTM/MM/SD

Timo John studied Business Informatics at the FH Nordakadmie in Hamburg. He complements our team as a Technical Consultant for SAP GTM, MM and SD with a huge preference for Code Quality. Besides that Timo was a SAPTechEd Community Speaker and loves to share his knowledge with others in lectures and trainings.

Timo is a family man and if he had to describe himself in two words, those words would be nerd and techie. The latter is shown by the fact that among other things he enjoys working on his home automization. Apart from that Timo also likes fotographing and spending time in his garden.

Lena Dunaieva

Technical Consultant

Lena Dunaieva is studying Business Informatics at the Leuphana University in Lüneburg. She supports our team as a Technical Consultant with a lot of passion for ABAP and software development. Besides working and studying Lena likes dancing salsa as well as inline skating and practising slalom. She is also learning Italian and loves to spend time with friends. Especially with those, where dogs are more than welcome.

Sara Maria Langner

Marketing & Communications

Sara Maria Langner completed a course on Social Media Management at the ILS Fernschule. From content creation to packing advent calendars, at ADventas she does everything that falls into the area of marketing and communications.

Besides her work at ADventas Sara is studying physics. She also loves to dance and to spend time with people as well as good books, art and piano music.


ADventas Consulting GmbH
Peter Langner
Kattjahren 8
22359 Hamburg

Tel.  +49 (40) 6055 9401
Fax  +49 (40) 6055 9400
Mob +49 (151) 1221 4867