5 Updated link to R. Jachter's article (published 03 July 2014 in the Jewish Link of Bergen County)
source | link

Qitzur Shulhhan Arukh - Yalqut Yosef, Siman 56:11 writes (my translation):

מנהג האשכנזים כדעת הרמ''א, לעמוד בשעה שעונים קדיש וברכו, וספרדי שמתפלל עם אשכנזים, נכון שיעמוד גם הוא עמהם בעת אמירת קדיש וברכו, כדי שלא יהיה בכלל יושב בין העומדים.

The Ashkenazi custom, per the ReM"A, is to stand when responding to Qaddish and Barekhu. And, as for a Sepharadi praying with Ashkenazim, it is proper for him to also stand with them when responding to Qaddish and Barekhu, so as not to sit among those standing.

My $0.02: Perhaps Hakham 'Ovadiah is poseq this way since standing among those sitting or sitting amongst those standing could cause Mahhloqet. Again, that interpretation is mine and he does not write that explicitly. He simply writes "so as not to sit among those standing".

Rav Chaim (Howard) Jachter rules similarly (in "Sephardic and Ashkenazic Practice: Do You Sit or Stand for Kaddish?Sephardic and Ashkenazic Practice: Do You Sit or Stand for Kaddish?") for an Ashkenazi praying amidst Sepharadim (i.e. that one should follow Minhag HaMaqom):

In addition to conforming to Minhag HaMakom (which, in general, is the proper practice – see Mishnah Pesahim 4:1) it seems disrespectful to Hashem if one would exclude himself from a Kehillah which is standing in honor of Hashem. Conversely, it seems appropriate for an Ashkenazi praying at a Sephardic synagogue to follow the custom of the Kehillah to remain seated for Kaddish.

Qitzur Shulhhan Arukh - Yalqut Yosef, Siman 56:11 writes (my translation):

מנהג האשכנזים כדעת הרמ''א, לעמוד בשעה שעונים קדיש וברכו, וספרדי שמתפלל עם אשכנזים, נכון שיעמוד גם הוא עמהם בעת אמירת קדיש וברכו, כדי שלא יהיה בכלל יושב בין העומדים.

The Ashkenazi custom, per the ReM"A, is to stand when responding to Qaddish and Barekhu. And, as for a Sepharadi praying with Ashkenazim, it is proper for him to also stand with them when responding to Qaddish and Barekhu, so as not to sit among those standing.

My $0.02: Perhaps Hakham 'Ovadiah is poseq this way since standing among those sitting or sitting amongst those standing could cause Mahhloqet. Again, that interpretation is mine and he does not write that explicitly. He simply writes "so as not to sit among those standing".

Rav Chaim (Howard) Jachter rules similarly (in "Sephardic and Ashkenazic Practice: Do You Sit or Stand for Kaddish?") for an Ashkenazi praying amidst Sepharadim (i.e. that one should follow Minhag HaMaqom):

In addition to conforming to Minhag HaMakom (which, in general, is the proper practice – see Mishnah Pesahim 4:1) it seems disrespectful to Hashem if one would exclude himself from a Kehillah which is standing in honor of Hashem. Conversely, it seems appropriate for an Ashkenazi praying at a Sephardic synagogue to follow the custom of the Kehillah to remain seated for Kaddish.

Qitzur Shulhhan Arukh - Yalqut Yosef, Siman 56:11 writes (my translation):

מנהג האשכנזים כדעת הרמ''א, לעמוד בשעה שעונים קדיש וברכו, וספרדי שמתפלל עם אשכנזים, נכון שיעמוד גם הוא עמהם בעת אמירת קדיש וברכו, כדי שלא יהיה בכלל יושב בין העומדים.

The Ashkenazi custom, per the ReM"A, is to stand when responding to Qaddish and Barekhu. And, as for a Sepharadi praying with Ashkenazim, it is proper for him to also stand with them when responding to Qaddish and Barekhu, so as not to sit among those standing.

My $0.02: Perhaps Hakham 'Ovadiah is poseq this way since standing among those sitting or sitting amongst those standing could cause Mahhloqet. Again, that interpretation is mine and he does not write that explicitly. He simply writes "so as not to sit among those standing".

Rav Chaim (Howard) Jachter rules similarly (in "Sephardic and Ashkenazic Practice: Do You Sit or Stand for Kaddish?") for an Ashkenazi praying amidst Sepharadim (i.e. that one should follow Minhag HaMaqom):

In addition to conforming to Minhag HaMakom (which, in general, is the proper practice – see Mishnah Pesahim 4:1) it seems disrespectful to Hashem if one would exclude himself from a Kehillah which is standing in honor of Hashem. Conversely, it seems appropriate for an Ashkenazi praying at a Sephardic synagogue to follow the custom of the Kehillah to remain seated for Kaddish.

4 Direct link to the Se'if in QSA-YY, and a direct link to the article by R. Jachter
source | link

Qitzur Shulhhan Arukh - Yalqut Yosef, Siman 56:11Qitzur Shulhhan Arukh - Yalqut Yosef, Siman 56:11 writes (my translation):

מנהג האשכנזים כדעת הרמ''א, לעמוד בשעה שעונים קדיש וברכו, וספרדי שמתפלל עם אשכנזים, נכון שיעמוד גם הוא עמהם בעת אמירת קדיש וברכו, כדי שלא יהיה בכלל יושב בין העומדים.

The Ashkenazi custom, per the ReM"A, is to stand when responding to Qaddish and Barekhu. And, as for a Sepharadi praying with Ashkenazim, it is proper for him to also stand with them when responding to Qaddish and Barekhu, so as not to sit among those standing.

My $0.02: Perhaps Hakham 'Ovadiah is poseq this way since standing among those sitting or sitting amongst those standing could cause Mahhloqet. Again, that interpretation is mine and he does not write that explicitly. He simply writes "so as not to sit among those standing".

Rav Chaim (Howard) Jachter rules similarlyrules similarly (7/3/2014 issue, page 41/72in "Sephardic and Ashkenazic Practice: Do You Sit or Stand for Kaddish?") for an Ashkenazi praying amidst Sepharadim (i.e. that one should follow Minhag HaMaqom):

In addition to conforming to Minhag HaMakom (which, in general, is the proper practice – see Mishnah Pesahim 4:1) it seems disrespectful to Hashem if one would exclude himself from a Kehillah which is standing in honor of Hashem. Conversely, it seems appropriate for an Ashkenazi praying at a Sephardic synagogue to follow the custom of the Kehillah to remain seated for Kaddish.

Qitzur Shulhhan Arukh - Yalqut Yosef, Siman 56:11 writes (my translation):

מנהג האשכנזים כדעת הרמ''א, לעמוד בשעה שעונים קדיש וברכו, וספרדי שמתפלל עם אשכנזים, נכון שיעמוד גם הוא עמהם בעת אמירת קדיש וברכו, כדי שלא יהיה בכלל יושב בין העומדים.

The Ashkenazi custom, per the ReM"A, is to stand when responding to Qaddish and Barekhu. And, as for a Sepharadi praying with Ashkenazim, it is proper for him to also stand with them when responding to Qaddish and Barekhu, so as not to sit among those standing.

My $0.02: Perhaps Hakham 'Ovadiah is poseq this way since standing among those sitting or sitting amongst those standing could cause Mahhloqet. Again, that interpretation is mine and he does not write that explicitly. He simply writes "so as not to sit among those standing".

Rav Chaim (Howard) Jachter rules similarly (7/3/2014 issue, page 41/72) for an Ashkenazi praying amidst Sepharadim (i.e. that one should follow Minhag HaMaqom):

In addition to conforming to Minhag HaMakom (which, in general, is the proper practice – see Mishnah Pesahim 4:1) it seems disrespectful to Hashem if one would exclude himself from a Kehillah which is standing in honor of Hashem. Conversely, it seems appropriate for an Ashkenazi praying at a Sephardic synagogue to follow the custom of the Kehillah to remain seated for Kaddish.

Qitzur Shulhhan Arukh - Yalqut Yosef, Siman 56:11 writes (my translation):

מנהג האשכנזים כדעת הרמ''א, לעמוד בשעה שעונים קדיש וברכו, וספרדי שמתפלל עם אשכנזים, נכון שיעמוד גם הוא עמהם בעת אמירת קדיש וברכו, כדי שלא יהיה בכלל יושב בין העומדים.

The Ashkenazi custom, per the ReM"A, is to stand when responding to Qaddish and Barekhu. And, as for a Sepharadi praying with Ashkenazim, it is proper for him to also stand with them when responding to Qaddish and Barekhu, so as not to sit among those standing.

My $0.02: Perhaps Hakham 'Ovadiah is poseq this way since standing among those sitting or sitting amongst those standing could cause Mahhloqet. Again, that interpretation is mine and he does not write that explicitly. He simply writes "so as not to sit among those standing".

Rav Chaim (Howard) Jachter rules similarly (in "Sephardic and Ashkenazic Practice: Do You Sit or Stand for Kaddish?") for an Ashkenazi praying amidst Sepharadim (i.e. that one should follow Minhag HaMaqom):

In addition to conforming to Minhag HaMakom (which, in general, is the proper practice – see Mishnah Pesahim 4:1) it seems disrespectful to Hashem if one would exclude himself from a Kehillah which is standing in honor of Hashem. Conversely, it seems appropriate for an Ashkenazi praying at a Sephardic synagogue to follow the custom of the Kehillah to remain seated for Kaddish.

3 changed Jachter source to more reliable one
source | link

Qitzur Shulhhan Arukh - Yalqut Yosef, Siman 56:11 writes (my translation):

מנהג האשכנזים כדעת הרמ''א, לעמוד בשעה שעונים קדיש וברכו, וספרדי שמתפלל עם אשכנזים, נכון שיעמוד גם הוא עמהם בעת אמירת קדיש וברכו, כדי שלא יהיה בכלל יושב בין העומדים.

The Ashkenazi custom, per the ReM"A, is to stand when responding to Qaddish and Barekhu. And, as for a Sepharadi praying with Ashkenazim, it is proper for him to also stand with them when responding to Qaddish and Barekhu, so as not to sit among those standing.

My $0.02: Perhaps Hakham 'Ovadiah is poseq this way since standing among those sitting or sitting amongst those standing could cause Mahhloqet. Again, that interpretation is mine and he does not write that explicitly. He simply writes "so as not to sit among those standing".

Rav Chaim (Howard) Jachter rules similarlyrules similarly (7/3/2014 issue, page 41/72) for an Ashkenazi praying amidst Sepharadim (i.e. that one should follow Minhag HaMaqom):

In addition to conforming to Minhag HaMakom (which, in general, is the proper practice – see Mishnah Pesahim 4:1) it seems disrespectful to Hashem if one would exclude himself from a Kehillah which is standing in honor of Hashem. Conversely, it seems appropriate for an Ashkenazi praying at a Sephardic synagogue to follow the custom of the Kehillah to remain seated for Kaddish.

Qitzur Shulhhan Arukh - Yalqut Yosef, Siman 56:11 writes (my translation):

מנהג האשכנזים כדעת הרמ''א, לעמוד בשעה שעונים קדיש וברכו, וספרדי שמתפלל עם אשכנזים, נכון שיעמוד גם הוא עמהם בעת אמירת קדיש וברכו, כדי שלא יהיה בכלל יושב בין העומדים.

The Ashkenazi custom, per the ReM"A, is to stand when responding to Qaddish and Barekhu. And, as for a Sepharadi praying with Ashkenazim, it is proper for him to also stand with them when responding to Qaddish and Barekhu, so as not to sit among those standing.

My $0.02: Perhaps Hakham 'Ovadiah is poseq this way since standing among those sitting or sitting amongst those standing could cause Mahhloqet. Again, that interpretation is mine and he does not write that explicitly. He simply writes "so as not to sit among those standing".

Rav Chaim Jachter rules similarly for an Ashkenazi praying amidst Sepharadim (i.e. that one should follow Minhag HaMaqom):

In addition to conforming to Minhag HaMakom (which, in general, is the proper practice – see Mishnah Pesahim 4:1) it seems disrespectful to Hashem if one would exclude himself from a Kehillah which is standing in honor of Hashem. Conversely, it seems appropriate for an Ashkenazi praying at a Sephardic synagogue to follow the custom of the Kehillah to remain seated for Kaddish.

Qitzur Shulhhan Arukh - Yalqut Yosef, Siman 56:11 writes (my translation):

מנהג האשכנזים כדעת הרמ''א, לעמוד בשעה שעונים קדיש וברכו, וספרדי שמתפלל עם אשכנזים, נכון שיעמוד גם הוא עמהם בעת אמירת קדיש וברכו, כדי שלא יהיה בכלל יושב בין העומדים.

The Ashkenazi custom, per the ReM"A, is to stand when responding to Qaddish and Barekhu. And, as for a Sepharadi praying with Ashkenazim, it is proper for him to also stand with them when responding to Qaddish and Barekhu, so as not to sit among those standing.

My $0.02: Perhaps Hakham 'Ovadiah is poseq this way since standing among those sitting or sitting amongst those standing could cause Mahhloqet. Again, that interpretation is mine and he does not write that explicitly. He simply writes "so as not to sit among those standing".

Rav Chaim (Howard) Jachter rules similarly (7/3/2014 issue, page 41/72) for an Ashkenazi praying amidst Sepharadim (i.e. that one should follow Minhag HaMaqom):

In addition to conforming to Minhag HaMakom (which, in general, is the proper practice – see Mishnah Pesahim 4:1) it seems disrespectful to Hashem if one would exclude himself from a Kehillah which is standing in honor of Hashem. Conversely, it seems appropriate for an Ashkenazi praying at a Sephardic synagogue to follow the custom of the Kehillah to remain seated for Kaddish.

2 added rav chaim jachter pesaq for ashko in seph shul
source | link
1
source | link