Mijnals started his playing career on the Mr. Bronsplein in Paramaribo, Suriname, together with his brother. The two would be coached by their father, then Hoofdklasse player, and Surinamese International Louis Mijnals. Mijnals played in the youth ranks of Remo on the Bronsplein before getting picked up by S.V. Robinhood.
SV Robinhood
In 1951, Mijnals joined Robinhood where his older brother had already been playing. As an attacker he was known for his speed and goal scoring ability. While his brother departed for a professional career in Brazil, Mijnals remained in Suriname, helping Robinhood to four national titles during his tenure with the club. In 1957, Mijnals moved to the Netherlands in pursuit of a professional career, joining USV Elinkwijk of Utrecht where he would play with his brother once more.
USV Elinkwijk
In 1957, Mijnals joined USV Elinkwijk from Utrecht competing the DutchEredivisie, the top flight of football in the Netherlands. He joined his brother and former Robinhood teammates Michel Kruin, Erwin Sparendam and Charly Marbach once more. Together they made up what was known as the "five-leaf clover", a group of Surinamese players who had been signed by the club. He amassed 66 caps for Elinkwijk scoring 7 regular season goals in three seasons with the club. He was then transferred to SV Zeist, remaining in Utrecht.
Final years
In 1960, Mijnals was transferred to SV Zeist, relegating to second division. He would go on to play for VV Zwartemeer and FC Hilversum before retiring as a player.
International career
Mijnals played for the Suriname national team. He made two appearances in 1954, in a set of friendly matches against the Netherlands at the André Kamperveen Stadion in Paramaribo. The first match ended in a 4–3 loss, with his brother scoring the third goal of the match. The second encounter ended in a 2–0 loss.
Personal life
Mijnals is the second son of former Suriname International Louis Mijnals. His older brother Humphrey Mijnals played for both the Netherlands, and the Suriname national teams, and was the first player of Surinamese descent to play for the Dutch national team. He and his brother played together for almost the entirety of their playing careers. His younger brother Stanley Mijnals was also a professional football player in Suriname.
