| Office | Post-nominal |
| Orders and Decorations |
| Military Medal for Gallantry | MMG |
| Distinguished Service Medal | DSM |
| Legal Positions, Etc. |
| Senior Counsel | SC |
| University Degrees[1] |
| Doctorate | DD, LLD, DLitt, LittD, DMus, MusD, DSc, ScD, DMed, DPhil, PhD, DSocSci, EngD, EdD, STD, etc. |
| Master's Degree | MA, MSc, MSci, MPhil, MLitt, MRes, MEng, MSocSc, MTh, LLM, MMath, MAcc, MFin, MBA, MEd, MEnt, MEd, PME, STL etc. |
| Bachelor's Degree | BA, BSc, LLB, BCL, BComm, BEng, BE, BAI, BArch, BD, BTh, BDes, BBS, BEd, STB, etc. |
| University Diplomas[1] |
| Higher Diploma | HDip |
| Postgraduate Diploma | PGD, PGDCCI(open), DCH, etc. |
| Diploma of Higher Education/Certificate of Higher Education | DipHE/CertHE |
| Peace Commissioner | PC |
| University Alumni |
| University College Cork | (NUI) |
| University College Dublin | (NUI) |
| University of Limerick | (Limerick) |
| University of Dublin (Trinity College) | (Dubl. - Dublinensis) |
| Dublin City University | (Dub City) |
| National University of Ireland, Galway | (NUI) |
| National University of Ireland, Maynooth | (NUI) |
| St. Patricks College, Maynooth (Pontifical University) | (Maynooth) |
| Open University | (Open) |
| Legal Qualifications |
| Bachelor's Degrees | LLB, DipLaw/CPE |
| Barrister at Law Degree | BL[2] |
| Master's Degrees | LLM, BCL, MJur |
| Diploma in Legal Studies | DipLegalStud |
| Doctorate | DPhil, PhD, LLD |
| Honorary Doctorate | DCL (Hon), LLD (Hon) |
| Medical Qualifications |
| Medicine | MB BCh BAO, BM BS, MD, etc. |
| Surgery | MRCS, FRCSI, MS, MCh, etc. |
| Physicians | MRCPI, FRCPI, MRCPath, MRCPsych etc. |
| Licentiates in Medicine and Surgery | LRCPI, LRCSI, LAH, etc. |
| Anaesthetists | MCAI, FFCAI, etc. |
| Biomedical Scientists (UK) or Medical Scientist (Ireland) | LIBMS, MIBMS, FIBMS, CSci (UK) or MACSLM, FACSLM (Ireland) |
| Nursing | BSc (Cur), BN |
| General Practitioners | MICGP, FRCGP |
| Medical Homeopaths | LFHOM, MFHOM, FFHOM |
| Pre-hospital Care Physicians | DipIMC RCSEd, FIMC RCSEd |
| Emergency Physicians | MCEM, FCEM |
| Physiotherapy | DPT, MCSP, FCSP, SRP, etc. |
| Pharmacists | MPSI, |
| Veterinary Nurses | VN, RVN |
| Veterinary Surgeons | BVSc, BVetMed, VetMB, BVM&S, MRCVS, FRCVS |
| Teaching Qualifications |
| Doctorate in Education | EdD |
| Postgraduate Certificate in Education | PGCE |
| Postgraduate Diploma in Education | PGDE |
| Graduate Diploma in Education | GDEd |
| Higher Diploma in Education | HDipEd |
| Certificate in Education | Cert. Ed. |
| Bachelor of Education | BEd |
| Engineering Qualifications |
| Chartered Engineer | CEng |
| Associate Engineer | AEng |
| Engineering Technician | EngTech |
| Information Technology Qualifications |
| Chartered IT Professional | CITP |
| Financial Services Qualifications |
| CFA Charterholder (CFA Institute) | CFA |
| Fellow of the Institute of Actuaries | FIA |
| Chartered Accountant | ACA, FCA |
| Chartered Certified Accountant(ACCA) | ACCA, FCCA |
| Certified Public Accountant | CPA |
| Chartered Institute of Management Accountants (CIMA) | ACMA, FCMA |
| Accounting Technician (Accounting Technicians Ireland - formerly called IATI) | MIATI |
| Professional Risk Manager (PRIMA) | PRM |
| Financial Risk Manager (GARP) | FRM |
| Fellowship and Membership of Learned Societies[3][4] |
| Member of the Academy of Clinical Science & Laboratory Medicine | MACSLM |
| Fellow of the Academy of Clinical Science & Laboratory Medicine | FACSLM |
| Member of the Institute of Archaeologists of Ireland | MIAI |
| Member of the Royal Irish Academy | MRIA |
| Member of the Engineers Ireland | MIEI |
| Member of the Royal College of Surgeons in Ireland | MRCSI |
| Member of the Geographical Society of Ireland | MGSI |
| Fellow of the Royal Academy of Medicine of Ireland | FRAMI |
| Member of the Royal Hibernian Academy | MRHA |
| Member of the Royal Institute of the Architects of Ireland | MRIAI |
| Member of the Royal Society of Antiquaries of Ireland | MSAI |
| Member of the Royal Dublin Society | MRDS |
| Member of the Honorable Society of King's Inns | MHSKI |
| Registered Member of the Archives and Records Association, Ireland | RMARA |
| Registered Member or Fellow of the Parental Alienation Awareness Association | MPAAA, FPAAA |
| Technician Member of Engineers Ireland | TechIEI |
| Fellow of Engineers Ireland | FIEI |
| Fellow of the Royal Anthropological Institute of Great Britain and Ireland | FRAI |
| Fellow of Trinity College | FTCD |
| Scholar of Trinity College | Sch |
| Member of the Public Relations Institute of Ireland[5] |
MPRII |
| Member of the Irish Society of Cinematographers[6] | ISC |
| Legislators |
| A Teachta Dála | TD |
| Member of the European Parliament | MEP |
| Religious Institutes[3] |
| Canons Regular | C.R. + Initials of specific Congregation e.g. C.R.I.C |
| Canons Regular of Premontré ("Praemonstratensians" or "Norbertines") | O.Praem. |
| Order of St Benedict ("Benedictines") | OSB |
| Order of Cistercians of Strict Observance ("Cistercians") | OCSO |
| Order of Preachers ("Dominicans" or "Blackfriars") Ordinis Praedicatorum | OP |
| Conventual Franciscans ("Franciscans" or "Greyfriars") | OFM Conv. |
| Capuchins Franciscans ("Capuchins") | OFM Cap. |
| Order of Friars Minor ("Franciscans") | OFM |
| Order of St Clare ("Poor Clares") | OSC |
| Order of St Augustine ("Augustinians") | OSA |
| Carmelites of the Ancient Observance ("Carmelites" or "Whitefriars") | O Carm. |
| Discalced Carmelites("Discalced Carmelites") | O.C.D. |
| Order of Servants of Mary ("Servites") | OSM |
| Brothers Hospitallers of St John of God ("St John of God Brothers") | OH |
| Society of Jesus ("Jesuits") | SJ or SI |
| Institute of the Blessed Virgin Mary ("Loreto Sisters") | IBVM |
| Vincentians | CM |
| Daughters of Charity | DC |
| Congregation of the Most Holy Redeemer ("Redemptorists") | C.Ss.R. |
| Congregation of the Passion ("Passionists") | C.P. |
| Congregatio Sancti Spiritus Holy Ghost Fathers | C.S.Sp. |
| Salesians | SDB |
| Society of the Divine Savior Salvatorians | SDB |
| Society of Mary ("Marists") | SM |
| Marist Brothers | FMS |
| Fratres Scholarum Christianorum ("De La Salle Brothers") | FSC |
| Religious Sisters of Mercy ("Mercy Sisters") | RSM |
| Religious Sisters of Charity ("Irish Sisters of Charity") | RSC |
| Presentation Sisters | IPBVM |
| Congregatio Fratrum Christianorum ("Congregation of Christian Brothers") | C.F.C. |
| Society of St Columban ("Columban Fathers") | SSC |
| Missionary Society of St Patrick ("Kiltegan Fathers") | SPS |