Johnston joins from Auchrannie Resort in Arran, where she worked for over three years as its HR and people development manager.
During her time there, the venue implemented “positive changes”, such as becoming Living Wage Accredited.
Johnston, who is described as a “people-person”, has worked in hospitality since the age of 18, and has previous experience working with JJW Hotels & Resorts and The Roxburghe Hotel.
Johnston said: “This is an amazing industry. I want more people seeing hospitality as a career choice, and not just as a part-time gap.
“There’s career opportunities, it’s rewarding, and you learn valuable skills for life.”
David Tracey, managing director of Manorview group, said: “Our Head of People role is an incredibly important one for us.
“The Manorview culture is very people-focused and while we’ve been busy implementing lots of initiatives over the past three years, there’s still so much more we want to achieve and progress towards.”
He added: “Claire’s appointment will help drive our journey, and we’re delighted she’s joined our team.”
Johnston said: “The Manorview Group’s passion for people resonates with me, and their forward-thinking plans, drive and energy is infectious. I’m very excited about the challenge and delighted to become part of their team.”
The Manorview Hotels & Leisure Group began in 2007 after the purchase of The Commercial Hotel in Wishaw.
Its portfolio consists of eight hotels, two pubs, two nightclubs, a leisure club and luxury spa.
For the past three years,the group said it focused on “culture and people development” through such initiatives as the “HeartCount Profit Share Fund, HeartCount Days, long service celebrations, team listening sessions, annual team party, a dedicated employee App, training programmes, career pathways, awards, team recognitions, giveaways and charity initiative”.