The Princess Royal will visit firms in Brighton and Hove on Thursday.
The princess will visit the offices of Kineo in Church Street, Brighton and the Carers Centre in Hove.
City & Guilds e-learning company Kineo moved into its new offices in Sovereign House last year.
The Princess Royal, who is president of the City & Guilds London Institute, will formally open the office and present certificates to long-serving employees at the firm.
The firm was named E-learning Company of the Year Award in Britain last year and now employs more than 120 people.
The Carers Centre in Bedford Place supports people who are anyone caring for a partner, relative or friend who needs help because of illness, disability, substance misuse or old age. It was established in 1988 as a drop-in centre in Hove.