Martha Horler is a Programme Manager for a Digital and Technology Solutions degree apprenticeship with 15 years of experience in higher education. She discussed ways to build an external reputation such as connecting with external organizations in her field, engaging in personal branding activities like setting up an online profile, and getting involved with organizations like submitting conference proposals and writing articles. The document provided tips on researching one's interests and values to develop expertise, using social media platforms, and taking action such as setting up a website or domain name to start building an external reputation.