Barclay's early career was spent at the University of Glasgow, where he was a lecturer from 1984 to 1996, senior lecturer from 1996 to 2000, and professor from 2000 to 2003. In 2003, he was named the successor to James D.G. Dunn as the Lightfoot Professor of Divinity at Durham University. Barclay is the current President of the British New Testament Society. He is the former editor of the academic journal New Testament Studies.
''Paul and the Gift''
One of Barclay's most recent works, Paul and the Gift, has drawn considerable praise from scholars around the world. It has been hailed by Markus Bockmuehl and Tim Foster as the most significant book on Paul since E.P. Sanders's Paul and Palestinian Judaism. Douglas Moo has said it is "one of the best books on Pauline theology in the last twenty years." Paul Foster likewise proclaims, "This book will be not only much-discussed in Pauline scholarship, it will be much-prized for the genuine advances it offers in understanding Paul’s thought." Paul and the Gift was also reviewed by scholars in popular publications such as Books & Culture and First Things. One of the insights from Paul and the Gift that led to its very positive reception is the manner in which Barclay develops Paul's theology of grace. By setting this concept in the context of ancient notions of gift, Barclay discerns six key ways in which gift, and thus grace, can be conveyed in Paul: superabundance, singularity, priority, incongruity, efficacy, and non-circularity. In an interview with Christianity Today, Barclay explains, "So while I disagree with the New Perspective in its sidelining grace within Paul’s thought, I agree with its emphasis that Paul was fundamentally concerned with creating new communities that crossed ethnic and social boundaries."
Criticism of N.T. Wright
Although they maintain a warm relationship, Barclay has been an outspoken critic of N.T. Wright's work on Paul. This has led to several high-profile debates between the two, most recently at New College, Edinburgh University on 15 June 2016 concerning each author's most recent books. They also debated Paul's relationship to the Roman Empire at the 2007 Society of Biblical Literature Annual Meeting in San Diego. Barclay's plenary speech from this session is now published as a chapter in his most recent work, Pauline Churches and Diaspora Jews.
Selected works
Jews in the Mediterranean Diaspora: From Alexander to Trajan . 2nd ed. Cornerstones. London: T&T Clark, 2018.
Paul and the Gift. Grand Rapids: Eerdmans, 2015.
The Last Years of Paul: Essays from the Tarragona Conference. Edited with Puig i Tàrrech and Jörg Frey. WUNT 352. Tübingen: Mohr Siebeck, 2015.
Pauline Churches and Diaspora Jews. WUNT 275. Tübingen: Mohr Siebeck, 2011. Reprinted, Grand Rapids: Eerdmans, 2016.
Against Apion. Flavius Josephus: Translation and Commentary 10. Leiden: Brill, 2006.
Divine and Human Agency in Paul and His Cultural Environment. Edited with Simon Gathercole. LNTS 335. London: T&T Clark, 2006.
Negotiating Diaspora: Jewish Strategies in the ROman Empire. LSTS 45. London: T&T Clark, 2004.
Diaspora. Translated by Paolo Bernardini. Introduzione allo studio della Bibbia 17. Brescia: Paideia, 2004.
Colossians and Philemon. Sheffield Guides. Sheffield: Sheffield Academic Press, 1997. Reprinted, T&T Clark Studies Guides. London: T&T Clark, 2004.