Herberts will work alongside his Harry Morgan, head of private investment management, who himself joined in March to spearhead the new venture. Both previously worked together at Adam & Company.
It has been a busy year for Thomas Miller Investment which last month named John Bearman as its new chief investment officer.
The firm has in excess of £2.7bn in funds under management running tailored investment portfolios for insurance mutuals, charities, pension schemes, governments and private clients.