Pennsylvania

In the year of his arrival in the United States, Beschter was assigned as a priest to St. Mary's Church in Lancaster, Pennsylvania.^[7] By the following year, he had been made pastor of the church,^[1] making him the only Jesuit pastor of St. Mary's following the restoration of the Society in America.^[8] Though assigned to St. Mary's, he drew the praise of Archbishop Carroll for simultaneously ministering to three congregations in the area, which comprised American, German, and Irish parishioners.^[9] His appointment as pastor quieted an existing quarrel within the parish over the nationality and language of the pastor. Beschter's predecessor, Herman J. Stoecker, was not proficient in English, to the consternation of the Irish congregants. Stoecker had succeeded Francis Fitzsimons, an Irishman who could not speak German, which ruffled the German majority of parishioners. Beschter's proficiency in English as well as his native German made him a satisfactory solution to the dispute.^[10]

During his pastorate, the church established a mission to Lebanon, Pennsylvania, in 1810, as it had done in other locations throughout the state in the past. Beschter celebrated the laying of the cornerstone of the mission church, named St. Mary of the Assumption,^[11] on July 23 of that year.^[12] Presiding over the ceremony, he preached in both English and German to a congregation of Catholics and Protestants,^[13] which included one Moravian, three Lutheran and three Reformed pastors.^[9] Beschter was described as having garnered the support and attachment of the congregation as pastor.^[14] Upon the end of his pastorate in 1812,^[1] he was replaced by another Irishman, Michael J. Byrne.^[9] Though successful as a pastor and a "very holy man", Carroll found Beschter in "want of a better education in the Society", as with many of the other foreign Jesuit missionaries in America.^[15]

Maryland

Beschter then became involved in the establishment of the Jesuit novitiate at White Marsh Manor in Prince George's County, Maryland. Though the Jesuits had an established presence in White Marsh dating to around 1741,^[16] it was not until 1814 that serious efforts to establish a new novitiate there were undertaken. Beschter escorted the first group of novices from Frederick, Maryland to the novitiate at White Marsh, where they arrived on July 12, 1814.^[17] For some time during that year, he acted as master of novices at White Marsh.^[18]

He is next noted as having been an assistant curate to Louis de Barth in Conewago in Adams County, Pennsylvania, in 1816.^[19] As the Catholic community surrounding Conewago grew, the initially dependent mission churches were granted greater degrees of autonomy, though still retaining an association with Conewago. Beschter was placed in charge of one of these – Brandt Chapel – in the Pigeon Hills area of Paradise in York County.^[20] Later that year, he was stationed in Frederick, where he remained for two years.^[21] By 1818, Beschter had fallen ill and became involved in disagreements with Bishop Michael Egan of Philadelphia,^[9] and so left for Georgetown in Washington, D.C.^[1] To mark the tercentenary of Martin Luther's writing of the Ninety-five Theses, a pamphlet was published in Philadelphia under Beschter's name titled "The Blessed Reformation – Martin Luther portrayed by himself". In reality, the pamphlet was written by Anthony Kohlmann, who used Beschter's name as a pseudonym.^[22]

In 1820, Beschter was appointed pastor of St. John the Evangelist Church in Baltimore, Maryland, on the site of the present St. Alphonsus Church.^[1] Succeeding F. X. Brosius,^[23] he led the mostly German congregation until 1828,^[1] when he was succeeded by Louis De Barth.^[23] Beschter became involved in the tensions stemming from American Jesuits' skepticism of their Continental European counterparts being put in charge of American institutions. He defended the Jesuit Superior General, Luigi Fortis' appointment of Polish-born Francis Dzierozynski in 1820 as socius,^{[lower-alpha 2]} consultor, and admonitor to Charles Neale (the mission superior for the United States), which vested Dzierozynski with broad authority.^[25] He condemned the "curious" American view that "sovereignty rests essentially in the people", as well as their opposition to monarchy.^[26] On February 2, 1821, the status of gradus in the Society of Jesus was conferred on Beschter.^{[lower-alpha 3][28]} When Dzierozynski was later made mission superior in 1823, Beschter again supported him.^[29]