Lankester left CDR last month after 20 months with the firm. She had previously been with Weber Shandwick Square Mile for six months after freelancing at the New York office of Capital MS&L.
The group is working across Smiths' four divisions: aerospace, detection, medical and speciality engineering.
Smiths has continued to expand by acquisition and this month paid £14m for Lorch Microwave, adding microwave filter technology to its electronic components and subsystems business Interconnect.
At the beginning of the month the company announced a 20 per cent year-on-year hike in sales.