Peter started his army career at the medical services of the Royal Netherlands Army. As an officer he served, amongst others, in project management (accredit military courses with civil certificates in co-operation with the Dutch Ministry of Education and Science); as Head Operational Management at the Army Logistics Training Centre (more than 12,000 students a year) and setting up and assess the Administrative Organization for Armed Forces GPs, dentists, physiotherapists and the medical insurance services.
As an author he also wrote several text and work books published at “Edu ‘Actief”.
After his army career, he started two businesses (SLS and Apeldoorns Talencentrum), which he manages with a partner and where 35 freelance language teachers of 17 languages are employed. At WuoA Peter Seas is lecturing the intensive Dutch Languages course as well as the Dutch as a second language modules.General Linguistics, English (business and ESP)