In January 1981, he was promoted to Minister of Finance.

In 1968 he was promoted to Minister of State for Trade.

In 2006, she was promoted to Minister of Health.

In 1940, he was promoted to Minister of Finance.

Lyster was promoted again to Minister for Health in 1991.

On February 3, 1977, he was promoted to Minister of Health.

In December of the same year, he was promoted to Minister for Education.

In 1982, he was promoted to Minister of National Revenue.

In November 1990, he was promoted to Minister of State.

On July 6, 1983, he was promoted to Minister of Revenue.