By profession he was a chemical engineer but he spent his life in serving Farahi's school of thought.

Allama Khalid Masud was born in Lilla Town, Jhelum District, Pakistan.

His father Saif U Rehman completed his education in 1926 from Oriental College Lahore where he learnt Arabic as major subject.

In 1985 he was offered position of Research Scholar in Quaid e Azam Library, Bagh e Jinnah Lahore.

But after completion of his studies he did not join Jamiat's parent party Jamat-e-Islami and preferred to learn Qur'an and Hadith from Maulana Amin Ahsan Islahi.

In 1958 Maulana Amin Ahsan Islahi separated from politics and Jamat-e-Islami and created a Halqa Taddabur Qur'an O Hadith.

Khalid Masud did a major role in converting knowledge of his teacher from his lectures into text for the benefits of the public.

[3] After death of Maulana Islahi, management of Madras Ul Islah, Siray Mir Azam Garh UP India arranged Imam Farahi Seminar in January 1999 and especially invited Allama Khalid Masud in place of Maulana Islahi.

He converted audio lectures of his teacher Maulana Islahi into books by editing and adding and deleting necessary / unnecessary portions.

In this book he tried to discuss and to clear some issues related to life of Muhammad in the light of Qur'an with a different and non-traditional approach.

Most of his published works are in the form of notes that were later compiled by his followers such Maulana Amin Ahsan Islahi and Allama Khalid Masud.

His effort made it easier for student to learn Arabic grammar He wrote a number of books for children on the topics of science.

[8] He translated following great books into Urdu language to make it easier for students of science and philosophy.

Famous scholar and companion of Islahi School of thought Allama Javed Ahmed Ghamidi offered his funeral prayer at Dongi Ground Samanabad Lahore.