One of his godfathers was his father's first cousin, Sir Richard Graves MacDonnell, and the other was his uncle, Edmund Allen Meredith, for whom he was given his middle name.

He was called to the Bar of Quebec in 1884, commencing his career as a barrister specializing in corporate law in the firm of Abbott & Badgeley at Montreal.

(brother of his cousin's wife, Lady Vincent Meredith), took over from the ageing Sir John Abbott and William Badgley to become the firm's new senior partners.

Campbell, Meredith & Allan continued the firm's dominance, acting as lawyers to the majority of the residents of the Golden Square Mile.

He was the Solicitor to the Shipping Federation of Canada in the early 1900s, and represented his client company, the CPR, as their Chief Consul at the investigation into the sinking of the RMS Empress of Ireland, presided over by Lord Mersey.

[1] Privy Council cases took him often to England, and he twice turned down offers to become a judge, preferring to maintain the business connections he held with many of his client companies.

His personal popularity, derived from graciousness of manner and sincerity of feeling, coupled with his intimate association with many of Canada's larger business concerns made him a desirable addition to the boards of a number of the country’s foremost corporations including: the Bank of Montreal; Royal Trust Company; Canadian Pacific Railway; Canadian Pacific Steamships; Standard Life of Edinburgh; Royal Securities Corporation; The National Steel Car Corporation; Canadian Cottons Ltd.; Lake Superior Corporation; National Liverpool Insurance Company (England); Montreal & General Investor Ltd.; The Banker's Trust Company and the Liverpool, London & Globe Insurance Company in England.

His interest in various educational and cultural undertakings was well known, particularly in the progress and welfare of Bishops University, where he led the successful financial campaign of 1924.

As an advocate to many of the country's largest corporations, along with his family connections and strength of character, Meredith wielded a very considerable influence in Quebec.

To commemorate the event, Meredith instituted a scholarship payable each year to the graduating student of the law faculty who obtained the highest marks.

He and his two former business partners, Charles Sandwith Campbell and James Bryce Allan, also endowed the Prix Jette, awarded annually to the best student in civil law at their shared alma mater, Université Laval.

From 1903, Meredith lived at a house designed for him by Robert Findlay on Pine Avenue in Montreal's Golden Square Mile.

In 1942, Mrs. Meredith went to stay with her daughter Shearme and her husband, Lt.-Col. John Lionel Philips, at their home Abbey Cwmhir Hall.

As a young man he'd also played ice hockey, and he was elected the honorary president of the Montreal Victorias when they won the Stanley Cup in 1895, 1896 and 1897.

Rather serious in his outlook on things and events, yet with a charming touch of Puck and Ariel in his nature, he united the imagination of his Irish ancestry with a sense of reality, responsibility and sympathetic feeling for others to a rare degree.

He died at his home on Pine Avenue in the Golden Square Mile shortly after eleven o’clock of that morning, predominantly of old age.